https://mil.news.sina.com.cn/jssd/2018-11-02/doc-ihnfikve5980889.shtml
中国歼10B推力矢量完胜苏35:尺寸小偏转角度大且耐用
中国歼10B推力矢量完胜苏35:尺寸小偏转角度大且耐用
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这一届珠海航展，很有意思的是，成飞不停刷屏，歼20编队一次又一次在珠海机场上空来回翻飞，而歼10B战斗机也不停的秀推力矢量喷管，谋杀了众多资深航空摄影师的快门次数，网络上大量高清大图流传，但是不少朋友还是觉得有点蒙圈，为啥看起来歼10B的推力矢量喷管和原始太行发动机喷管没啥两样，都一样尺寸，地面停机下垂也不明显，不像俄罗斯苏35战斗机粗长的喷管那么醒目。
这就是歼10B的推力矢量喷管下垂图
这是苏35战斗机的推力矢量，从这个角度看下垂不明显，但是
这就是苏35战斗机的推力矢量喷管，很长吧，大家记住喷管直径大约1米
小红圈是中国歼10B推力矢量，大红圈是俄罗斯苏35设计师思路，差距很大
或许就有人问了，为何都是推力矢量喷管，中国歼10B短小这么多，而俄罗斯苏35粗长到不能接受？
徐娘身老谩多情：中国与乌克兰发动机合作是否到尽头1/24
查看原图图集模式
近日，国内多家媒体组团赴乌克兰马达西奇公司采访调研，此次采访活动事宜“纪念改革开放40周年，中乌务实合作”为主题的。访团深入了解了马达西奇公司辉煌历史、研制能力和与中国合作的最新进展。中国某直辖市某马达西奇合伙企业总裁一同会见了采访团一行。本期《出鞘》我们就来谈谈马达西奇公司的前世今生，以及马达西奇背后的中国与乌克兰的“务实合作”。（查看完整内容搜索微信公众号：sinamilnews）
从外表来看，都是圆柱形的喷管，有人就会觉得差不多，其实俄罗斯苏35这种推力矢量喷管水平设计太差，可以算世界倒数，当然和俄罗斯历史上推力矢量喷管来比还是强不少。
推力矢量这个技术其实不是新花样，50年代开始很多导弹都开始使用，但是一直到了80年代，战斗机设计师在70年代开始三代机格斗上得到的经验表明，普通三代机由于气动舵面天生的特性，舵面从20度大多就开始气流分离，到了30度几乎几乎不可用，整机最大可控迎角一般不超过30度，这严重限制了飞机机动性发挥，所以科学家就放弃了普通气动舵面控制这一个路子，将目光投射到发动机上。
典型三代机机动性虽然比二代机大大提高，但是迎角大多不差过30度
发动机有个好处就是，安装位置靠后，而且推力巨大，稍微喷管偏转一点就可以得到很大的控制力矩，这就成了新科技的一个制高点，美国俄罗斯都耗费巨资开发推力矢量技术，扁的圆的，单方向的全方向的都有，最终F22第一个使用扁平推力矢量喷管服役，极大的提高了飞机机动性，以及隐身效能，但是带来了巨大的发动机推力损失和巨大的重量增加，即使采用了航天陶瓷技术疯狂减重，一台F119发动机推力矢量喷口加控制系统增重就超过200公斤。
美俄争霸，跟风是俄罗斯人本性，俄罗斯人在苏27上采用的扁平推力矢量技术，则遭到大败，高温燃起从燃烧室流动到喷口，圆形转方口推力损失高达14%-17%，而且发动机增重超过半吨，要知道AL-31F发动机整机才1500公斤，几乎三分之一，一架苏27使用两台推力矢量发动机的话，整机尾部就要增重1吨，为了配平机头也差不多增加1吨，全机增加2吨重量，这飞机完全废了，所以俄罗斯跪了，转向圆形推力矢量，学名叫轴对称推力矢量。
F22战斗机采用先进二元推力矢量，谁都不敢跟进，增重实在太多，推力损失太大
最终俄罗斯人采取了比较保守稳妥的设计，在AL-31F发动机上进行改进设计，型号改为AL-31FP发动机，设计特点是安装在喉道前的万向球形结构实现了俯仰偏转，这种设计的优点是，运动结构简单，容易实现，缺点是冷却和密封难度大，最终AL31FP发动机喷管转向部分使得发动机增重110公斤，长度增加0.4米！
可以看出，苏35推力矢量喷口运动方向是倾斜的
苏35战斗机的推力矢量采用万向接头式，由面积可调的收敛扩散喷管和可偏转的球形结构框架组成，球形结构框架安装在喉道前，通过绕万向球形接头转动收敛扩散喷管整体产生偏转得到矢量推力。
AL31FP发动机推力矢量喷管偏转轴线和垂直方向成32度夹角，偏转角度仅为15度，转向速度每秒30度，通过同步动作和差动，可以让飞机得到垂直方向和侧面方向矢量推力，这种设计也延续到了苏57战斗机上，喷管控制系统媒介为封闭在发动机控制系统中的航空油料，省事省钱。
这就是苏35发动机的推力矢量运动模式，同步动作和差动
从技术来说，俄罗斯人的推力矢量技术非常非常原始，设计师不敢在发动机喷口喉道以后做动作，所以在加力燃烧室段做的铰接，距离成飞歼10B这种平衡梁式的差2代技术，歼10B推力矢量喷管技术是在每一个做动器上的喉道和扩散一起动作，先进很多。
歼10B推力矢量喷口可以360度随便动作，比苏35设计更好些
而歼10B的推力矢量技术是作动环式的，它由矢量调节作动筒，喉道面积调节作动筒，调节环和调节环支撑机构组成，歼10B的推力矢量设计方案，和美国F110发动机上的差不多，轴对称矢量喷管有3个相互成120度的三个矢量调节作动筒，多个喉道面积调节作动筒，可以360度全方位偏转，最大偏转角速度60度每秒。
这是中国一个推力矢量方案，和歼10B大体相似稍有小小不同
按照某些资料的说法，按照推力矢量设计准则，俄罗斯方案完全不合格，推力矢量设计大体有以下要求：
矢量偏转角度应该达到20度，偏转后发动机性能损失小，稳态和过渡态矢量对发动机节流无限制，外形尺寸小，矢量对飞机尾翼无干扰，俯仰矢量推力最大应该达到20%的发动机加力推力，偏航矢量推力最大应该达到10%加力推力，俯仰变化率最大60度每秒，偏航则为30度每秒，控制系统特性应该满足推力矢量喷管动静特性要求。
发动机推力矢量偏转角度，和偏转快慢都很有讲究
按照这个标准来说，苏35的推力矢量严重不达标，主要体现在偏转角度小，只有15度，而且外形尺寸大，高速飞行偏转带来阻力过大，俯仰变化率也不够快。
实际上来说，歼10B推力矢量技术完爆苏35推力矢量技术，增重预计40-50公斤，对发动机和整机影响极小，而且喷管寿命很长。（作者署名：大水）
China 歼10B thrust vector wins Su 35: small size and large deflection angle and durable
China 歼10B thrust vector wins Su 35: small size and large deflection angle and durable
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At this year's Zhuhai Air Show, it is very interesting that Chengfei continued to brush the screen, and the 歼20 formation once again flew back and forth over Zhuhai Airport, while the 歼10B fighter did not stop the show thrust vector nozzle, murdering many The number of shutters of senior aeronautical photographers, a large number of high-definition big pictures on the Internet, but many friends still feel a bit of a circle, for the 啥10B thrust vector nozzle and the original Taihang engine nozzle are the same size, the same size The ground stoppage is not obvious, not as conspicuous as the thick nozzle of the Russian Su 35 fighter.
This is the squat 10B thrust vector nozzle drop diagram. This is the 歼10B thrust vector nozzle drop diagram.
This is the thrust vector of the Su 35 fighter. From this point of view, the droop is not obvious, but this is the thrust vector of the Su 35 fighter. From this point of view, the droop is not obvious, but
This is the thrust vector nozzle of the Su 35 fighter. It is very long. Let us remember that the diameter of the nozzle is about 1 meter. This is the thrust vector nozzle of the Su 35 fighter. It is very long. Let’s remember that the nozzle is about 1 meter in diameter.
The small red circle is the Chinese 歼10B thrust vector, the red circle is the Russian Su 35 designer idea, the gap is very large, the red circle is the Chinese 歼10B thrust vector, the big red circle is the Russian Su 35 designer ideas, the gap is very big
Perhaps someone asked, why are the thrust vector nozzles, China's 歼 10B is so short, and the Russian Su 35 is too thick to accept?
Xu Niang is old and passionate: whether the cooperation between China and the Ukrainian engine is at the end of 1/24
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Recently, a number of domestic media groups went to Uzbekistan to interview and investigate the issue. The interview event was held on the theme of "commemorating the 40th anniversary of reform and opening up and pragmatic cooperation between China and Ukraine." The delegation learned more about Madsic's glorious history, research capabilities and the latest developments in cooperation with China. The president of a Madsic partnership in a municipality directly under the Central Government of China met with the delegation. In this issue of "Sheathing", let's talk about Madsic's past and present, and the "pragmatic cooperation" between China and Ukraine behind Madic. (View full content search WeChat public number: sinamilnews)
From the outside, it is a cylindrical nozzle, some people will feel almost the same, in fact, the Russian Su 35 this thrust vector nozzle horizontal design is too bad, can be counted as the world countdown, of course, compared with the Russian history of the thrust vector nozzle Still a lot stronger.
The technique of thrust vector is not a new trick. Many missiles began to be used in the 1950s, but it was not until the 1980s that the experience of fighter designers in the 3rd generation of fighting in the 1970s showed that the ordinary three-generation machine was born with natural characteristics. The rudder surface is mostly separated from 20 degrees, and almost 30 degrees is almost unusable. The maximum controllable angle of attack of the whole machine is generally less than 30 degrees, which severely limits the maneuverability of the aircraft, so the scientist gave up the ordinary pneumatic rudder. Control this path and project your gaze on the engine.
Although the mobility of the typical three-generation machine is much higher than that of the second-generation machine, the angle of attack is not worse than 30 degrees. The typical three-generation machine mobility is greatly improved compared with the second-generation machine, but the angle of attack is mostly not less than 30 degrees.
The engine has the advantage that the installation position is backward, and the thrust is huge. A little controllable torque can be obtained by slightly deflecting the nozzle. This has become a commanding point of new technology. The United States and Russia have spent huge sums of money to develop thrust vector technology. The flat round, unidirectional omnidirectional, the F22 is the first to use a flat thrust vector nozzle, which greatly improves the maneuverability of the aircraft, as well as stealth performance, but brings huge engine thrust loss and The huge weight increase, even with the aerospace ceramic technology crazy weight loss, a F119 engine thrust vector spout plus control system gains more than 200 kg.
The United States and Russia are hegemony, and the follow-up is the nature of the Russians. The flat thrust vector technology adopted by the Russians on the Su-27 is defeated. The high temperature ignites from the combustion chamber to the nozzle, and the thrust loss of the circular square port is as high as 14%. 17%, and the engine gains more than half a ton. It is necessary to know that the AL-31F engine is only 1500 kg, almost one-third. If one Su-27 uses two thrust vector engines, the tail of the whole machine will gain 1 ton. In order to balance the nose, it also increased by almost 1 ton. The whole machine increased by 2 tons. The aircraft was completely scrapped, so Russia smashed and turned to the circular thrust vector. The scientific name was axisymmetric thrust vector.
F22 fighters use advanced binary thrust vector, no one dares to follow up, there is too much weight gain, too much thrust loss. F22 fighters use advanced binary thrust vector, no one dares to follow up, too much weight gain, thrust loss Too big
In the end, the Russians adopted a more conservative design and improved the design on the AL-31F engine. The model was changed to the AL-31FP engine. The design features a universal spherical structure installed in front of the throat to achieve pitch deflection. The advantage is that the movement structure is simple and easy to implement. The disadvantage is that the cooling and sealing are difficult. Finally, the steering part of the AL31FP engine nozzle makes the engine gain 110 kg and the length increases by 0.4 m!
It can be seen that the direction of motion of the Su 35 thrust vector nozzle is tilted. It can be seen that the motion direction of the Su 35 thrust vector nozzle is inclined.
The thrust vector of the Su 35 fighter is a universal joint type consisting of an area-adjustable convergent diffusion nozzle and a deflectable spherical structural frame. The spherical structural frame is installed in front of the throat and rotates around the universal spherical joint to converge the diffusion nozzle. The overall deflection produces a vector thrust.
The AL31FP engine thrust vector nozzle has a deflection angle of 32 degrees from the vertical direction, a deflection angle of only 15 degrees, and a steering speed of 30 degrees per second. By synchronous action and differential, the aircraft can obtain vertical and lateral direction vector thrust. This design also extends to the Su 57 fighter. The nozzle control system medium is the aviation fuel enclosed in the engine control system, saving money and money.
This is the thrust vector motion mode of the Su 35 engine, synchronous action and differential. This is the thrust vector motion mode of the Su 35 engine, synchronous action and differential
From the technical point of view, the Russian thrust vector technology is very very primitive, the designer does not dare to do the action after the engine nozzle throat, so the articulation in the afterburner section, the balance beam type of Chengfeiyu 10B Poor 2 generation technology, 歼 10B thrust vector nozzle technology is a movement of the throat and diffusion on each actuator, a lot advanced.
歼10B thrust vector spout can be 360 degrees casually, better than Su 35 design 歼 10B thrust vector spout can be 360 degrees casual movement, better than Su 35 design
The 歼10B thrust vector technology is an actuating ring type, which consists of a vector adjustment actuator, a throat area adjustment actuator, an adjustment ring and an adjustment ring support mechanism, a 推力10B thrust vector design scheme, and the US F110. On the engine, the axisymmetric vector nozzle has three vector adjustment actuators that are 120 degrees from each other. The multiple throat area adjustment actuators can be deflected 360 degrees in all directions. The maximum deflection angular velocity is 60 degrees per second. .
This is a thrust vector scheme in China. It is similar to the 歼10B in a slightly different way. This is a thrust vector scheme in China. It is similar to the 歼10B.
According to some data, according to the thrust vector design criteria, the Russian scheme is completely unqualified, and the thrust vector design generally has the following requirements:
The vector deflection angle should reach 20 degrees, the engine performance loss after deflection is small, the steady state and transition state vectors have no restriction on engine throttling, the size is small, the vector has no interference to the aircraft tail, and the pitch vector thrust should reach 20% of the engine plus For force thrust, the yaw vector thrust should reach 10% afterburning thrust, the pitch change rate is up to 60 degrees per second, and the yaw is 30 degrees per second. The control system characteristics should meet the dynamic and static characteristics of the thrust vector nozzle.
Engine thrust vector deflection angle, and deflection speed are very particular about the engine thrust vector deflection angle, and the deflection speed is very particular
According to this standard, the thrust vector of Su 35 is seriously not up to standard, mainly reflected in the small deflection angle, only 15 degrees, and the size is large, the high-speed flight deflection brings too much resistance, and the pitch change rate is not fast enough.
In fact, the 歼10B thrust vector technology completes the Su 35 thrust vector technology, the weight gain is expected to be 40-50 kg, the impact on the engine and the whole machine is very small, and the nozzle life is very long. (Author's signature: Dashui)
中国歼10B推力矢量完胜苏35:尺寸小偏转角度大且耐用
中国歼10B推力矢量完胜苏35:尺寸小偏转角度大且耐用
1,994
这一届珠海航展，很有意思的是，成飞不停刷屏，歼20编队一次又一次在珠海机场上空来回翻飞，而歼10B战斗机也不停的秀推力矢量喷管，谋杀了众多资深航空摄影师的快门次数，网络上大量高清大图流传，但是不少朋友还是觉得有点蒙圈，为啥看起来歼10B的推力矢量喷管和原始太行发动机喷管没啥两样，都一样尺寸，地面停机下垂也不明显，不像俄罗斯苏35战斗机粗长的喷管那么醒目。
或许就有人问了，为何都是推力矢量喷管，中国歼10B短小这么多，而俄罗斯苏35粗长到不能接受？
徐娘身老谩多情：中国与乌克兰发动机合作是否到尽头1/24
查看原图图集模式
近日，国内多家媒体组团赴乌克兰马达西奇公司采访调研，此次采访活动事宜“纪念改革开放40周年，中乌务实合作”为主题的。访团深入了解了马达西奇公司辉煌历史、研制能力和与中国合作的最新进展。中国某直辖市某马达西奇合伙企业总裁一同会见了采访团一行。本期《出鞘》我们就来谈谈马达西奇公司的前世今生，以及马达西奇背后的中国与乌克兰的“务实合作”。（查看完整内容搜索微信公众号：sinamilnews）
从外表来看，都是圆柱形的喷管，有人就会觉得差不多，其实俄罗斯苏35这种推力矢量喷管水平设计太差，可以算世界倒数，当然和俄罗斯历史上推力矢量喷管来比还是强不少。
推力矢量这个技术其实不是新花样，50年代开始很多导弹都开始使用，但是一直到了80年代，战斗机设计师在70年代开始三代机格斗上得到的经验表明，普通三代机由于气动舵面天生的特性，舵面从20度大多就开始气流分离，到了30度几乎几乎不可用，整机最大可控迎角一般不超过30度，这严重限制了飞机机动性发挥，所以科学家就放弃了普通气动舵面控制这一个路子，将目光投射到发动机上。
发动机有个好处就是，安装位置靠后，而且推力巨大，稍微喷管偏转一点就可以得到很大的控制力矩，这就成了新科技的一个制高点，美国俄罗斯都耗费巨资开发推力矢量技术，扁的圆的，单方向的全方向的都有，最终F22第一个使用扁平推力矢量喷管服役，极大的提高了飞机机动性，以及隐身效能，但是带来了巨大的发动机推力损失和巨大的重量增加，即使采用了航天陶瓷技术疯狂减重，一台F119发动机推力矢量喷口加控制系统增重就超过200公斤。
美俄争霸，跟风是俄罗斯人本性，俄罗斯人在苏27上采用的扁平推力矢量技术，则遭到大败，高温燃起从燃烧室流动到喷口，圆形转方口推力损失高达14%-17%，而且发动机增重超过半吨，要知道AL-31F发动机整机才1500公斤，几乎三分之一，一架苏27使用两台推力矢量发动机的话，整机尾部就要增重1吨，为了配平机头也差不多增加1吨，全机增加2吨重量，这飞机完全废了，所以俄罗斯跪了，转向圆形推力矢量，学名叫轴对称推力矢量。
最终俄罗斯人采取了比较保守稳妥的设计，在AL-31F发动机上进行改进设计，型号改为AL-31FP发动机，设计特点是安装在喉道前的万向球形结构实现了俯仰偏转，这种设计的优点是，运动结构简单，容易实现，缺点是冷却和密封难度大，最终AL31FP发动机喷管转向部分使得发动机增重110公斤，长度增加0.4米！
苏35战斗机的推力矢量采用万向接头式，由面积可调的收敛扩散喷管和可偏转的球形结构框架组成，球形结构框架安装在喉道前，通过绕万向球形接头转动收敛扩散喷管整体产生偏转得到矢量推力。
AL31FP发动机推力矢量喷管偏转轴线和垂直方向成32度夹角，偏转角度仅为15度，转向速度每秒30度，通过同步动作和差动，可以让飞机得到垂直方向和侧面方向矢量推力，这种设计也延续到了苏57战斗机上，喷管控制系统媒介为封闭在发动机控制系统中的航空油料，省事省钱。
从技术来说，俄罗斯人的推力矢量技术非常非常原始，设计师不敢在发动机喷口喉道以后做动作，所以在加力燃烧室段做的铰接，距离成飞歼10B这种平衡梁式的差2代技术，歼10B推力矢量喷管技术是在每一个做动器上的喉道和扩散一起动作，先进很多。
而歼10B的推力矢量技术是作动环式的，它由矢量调节作动筒，喉道面积调节作动筒，调节环和调节环支撑机构组成，歼10B的推力矢量设计方案，和美国F110发动机上的差不多，轴对称矢量喷管有3个相互成120度的三个矢量调节作动筒，多个喉道面积调节作动筒，可以360度全方位偏转，最大偏转角速度60度每秒。
按照某些资料的说法，按照推力矢量设计准则，俄罗斯方案完全不合格，推力矢量设计大体有以下要求：
矢量偏转角度应该达到20度，偏转后发动机性能损失小，稳态和过渡态矢量对发动机节流无限制，外形尺寸小，矢量对飞机尾翼无干扰，俯仰矢量推力最大应该达到20%的发动机加力推力，偏航矢量推力最大应该达到10%加力推力，俯仰变化率最大60度每秒，偏航则为30度每秒，控制系统特性应该满足推力矢量喷管动静特性要求。
按照这个标准来说，苏35的推力矢量严重不达标，主要体现在偏转角度小，只有15度，而且外形尺寸大，高速飞行偏转带来阻力过大，俯仰变化率也不够快。
实际上来说，歼10B推力矢量技术完爆苏35推力矢量技术，增重预计40-50公斤，对发动机和整机影响极小，而且喷管寿命很长。（作者署名：大水）
China 歼10B thrust vector wins Su 35: small size and large deflection angle and durable
China 歼10B thrust vector wins Su 35: small size and large deflection angle and durable
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At this year's Zhuhai Air Show, it is very interesting that Chengfei continued to brush the screen, and the 歼20 formation once again flew back and forth over Zhuhai Airport, while the 歼10B fighter did not stop the show thrust vector nozzle, murdering many The number of shutters of senior aeronautical photographers, a large number of high-definition big pictures on the Internet, but many friends still feel a bit of a circle, for the 啥10B thrust vector nozzle and the original Taihang engine nozzle are the same size, the same size The ground stoppage is not obvious, not as conspicuous as the thick nozzle of the Russian Su 35 fighter.
This is the squat 10B thrust vector nozzle drop diagram. This is the 歼10B thrust vector nozzle drop diagram.
This is the thrust vector of the Su 35 fighter. From this point of view, the droop is not obvious, but this is the thrust vector of the Su 35 fighter. From this point of view, the droop is not obvious, but
This is the thrust vector nozzle of the Su 35 fighter. It is very long. Let us remember that the diameter of the nozzle is about 1 meter. This is the thrust vector nozzle of the Su 35 fighter. It is very long. Let’s remember that the nozzle is about 1 meter in diameter.
The small red circle is the Chinese 歼10B thrust vector, the red circle is the Russian Su 35 designer idea, the gap is very large, the red circle is the Chinese 歼10B thrust vector, the big red circle is the Russian Su 35 designer ideas, the gap is very big
Perhaps someone asked, why are the thrust vector nozzles, China's 歼 10B is so short, and the Russian Su 35 is too thick to accept?
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From the outside, it is a cylindrical nozzle, some people will feel almost the same, in fact, the Russian Su 35 this thrust vector nozzle horizontal design is too bad, can be counted as the world countdown, of course, compared with the Russian history of the thrust vector nozzle Still a lot stronger.
The technique of thrust vector is not a new trick. Many missiles began to be used in the 1950s, but it was not until the 1980s that the experience of fighter designers in the 3rd generation of fighting in the 1970s showed that the ordinary three-generation machine was born with natural characteristics. The rudder surface is mostly separated from 20 degrees, and almost 30 degrees is almost unusable. The maximum controllable angle of attack of the whole machine is generally less than 30 degrees, which severely limits the maneuverability of the aircraft, so the scientist gave up the ordinary pneumatic rudder. Control this path and project your gaze on the engine.
Although the mobility of the typical three-generation machine is much higher than that of the second-generation machine, the angle of attack is not worse than 30 degrees. The typical three-generation machine mobility is greatly improved compared with the second-generation machine, but the angle of attack is mostly not less than 30 degrees.
The engine has the advantage that the installation position is backward, and the thrust is huge. A little controllable torque can be obtained by slightly deflecting the nozzle. This has become a commanding point of new technology. The United States and Russia have spent huge sums of money to develop thrust vector technology. The flat round, unidirectional omnidirectional, the F22 is the first to use a flat thrust vector nozzle, which greatly improves the maneuverability of the aircraft, as well as stealth performance, but brings huge engine thrust loss and The huge weight increase, even with the aerospace ceramic technology crazy weight loss, a F119 engine thrust vector spout plus control system gains more than 200 kg.
The United States and Russia are hegemony, and the follow-up is the nature of the Russians. The flat thrust vector technology adopted by the Russians on the Su-27 is defeated. The high temperature ignites from the combustion chamber to the nozzle, and the thrust loss of the circular square port is as high as 14%. 17%, and the engine gains more than half a ton. It is necessary to know that the AL-31F engine is only 1500 kg, almost one-third. If one Su-27 uses two thrust vector engines, the tail of the whole machine will gain 1 ton. In order to balance the nose, it also increased by almost 1 ton. The whole machine increased by 2 tons. The aircraft was completely scrapped, so Russia smashed and turned to the circular thrust vector. The scientific name was axisymmetric thrust vector.
F22 fighters use advanced binary thrust vector, no one dares to follow up, there is too much weight gain, too much thrust loss. F22 fighters use advanced binary thrust vector, no one dares to follow up, too much weight gain, thrust loss Too big
In the end, the Russians adopted a more conservative design and improved the design on the AL-31F engine. The model was changed to the AL-31FP engine. The design features a universal spherical structure installed in front of the throat to achieve pitch deflection. The advantage is that the movement structure is simple and easy to implement. The disadvantage is that the cooling and sealing are difficult. Finally, the steering part of the AL31FP engine nozzle makes the engine gain 110 kg and the length increases by 0.4 m!
It can be seen that the direction of motion of the Su 35 thrust vector nozzle is tilted. It can be seen that the motion direction of the Su 35 thrust vector nozzle is inclined.
The thrust vector of the Su 35 fighter is a universal joint type consisting of an area-adjustable convergent diffusion nozzle and a deflectable spherical structural frame. The spherical structural frame is installed in front of the throat and rotates around the universal spherical joint to converge the diffusion nozzle. The overall deflection produces a vector thrust.
The AL31FP engine thrust vector nozzle has a deflection angle of 32 degrees from the vertical direction, a deflection angle of only 15 degrees, and a steering speed of 30 degrees per second. By synchronous action and differential, the aircraft can obtain vertical and lateral direction vector thrust. This design also extends to the Su 57 fighter. The nozzle control system medium is the aviation fuel enclosed in the engine control system, saving money and money.
This is the thrust vector motion mode of the Su 35 engine, synchronous action and differential. This is the thrust vector motion mode of the Su 35 engine, synchronous action and differential
From the technical point of view, the Russian thrust vector technology is very very primitive, the designer does not dare to do the action after the engine nozzle throat, so the articulation in the afterburner section, the balance beam type of Chengfeiyu 10B Poor 2 generation technology, 歼 10B thrust vector nozzle technology is a movement of the throat and diffusion on each actuator, a lot advanced.
歼10B thrust vector spout can be 360 degrees casually, better than Su 35 design 歼 10B thrust vector spout can be 360 degrees casual movement, better than Su 35 design
The 歼10B thrust vector technology is an actuating ring type, which consists of a vector adjustment actuator, a throat area adjustment actuator, an adjustment ring and an adjustment ring support mechanism, a 推力10B thrust vector design scheme, and the US F110. On the engine, the axisymmetric vector nozzle has three vector adjustment actuators that are 120 degrees from each other. The multiple throat area adjustment actuators can be deflected 360 degrees in all directions. The maximum deflection angular velocity is 60 degrees per second. .
This is a thrust vector scheme in China. It is similar to the 歼10B in a slightly different way. This is a thrust vector scheme in China. It is similar to the 歼10B.
According to some data, according to the thrust vector design criteria, the Russian scheme is completely unqualified, and the thrust vector design generally has the following requirements:
The vector deflection angle should reach 20 degrees, the engine performance loss after deflection is small, the steady state and transition state vectors have no restriction on engine throttling, the size is small, the vector has no interference to the aircraft tail, and the pitch vector thrust should reach 20% of the engine plus For force thrust, the yaw vector thrust should reach 10% afterburning thrust, the pitch change rate is up to 60 degrees per second, and the yaw is 30 degrees per second. The control system characteristics should meet the dynamic and static characteristics of the thrust vector nozzle.
Engine thrust vector deflection angle, and deflection speed are very particular about the engine thrust vector deflection angle, and the deflection speed is very particular
According to this standard, the thrust vector of Su 35 is seriously not up to standard, mainly reflected in the small deflection angle, only 15 degrees, and the size is large, the high-speed flight deflection brings too much resistance, and the pitch change rate is not fast enough.
In fact, the 歼10B thrust vector technology completes the Su 35 thrust vector technology, the weight gain is expected to be 40-50 kg, the impact on the engine and the whole machine is very small, and the nozzle life is very long. (Author's signature: Dashui)
