振荡射流气动矢量喷管参数影响特性的试验研究  

Experimental Study on the Influence of Fluidic Thrust Vector Nozzle Parameters on Characteristics Using Sweeping Jets

作　　者：刘沛聪 周楷文 王士奇 温新 Liu Peicong;Zhou Kaiwen;Wang Shiqi;Wen Xin(Shanghai Jiao Tong University,Shanghai 200240,China;Aero Engine Academy of China,Beijing 101304,China)

机构地区：[1]上海交通大学,上海200240 [2]中国航空发动机研究院,北京101304

出　　处：《航空科学技术》2023年第10期9-16,共8页Aeronautical Science & Technology

摘　　要：基于康达效应的同向流矢量技术控制效率高、推力损失低,具备提高飞行器隐身性能的巨大潜力。为了探究马赫数Ma 0.35主流下二次流类型、二次流阵列个数、康达壁面半径R和终止角θ等参数对同向流矢量控制的影响,利用天平研究了9种不同的喷管模型的力学特性,获得矢量偏转力随次主质量流量比变化的控制规律。结果表明,主喷管高和康达壁面半径的比值H/R是对矢量偏转效率和控制稳定性最重要的因素,H/R越低,控制效率越高,控制曲线线性度越高;使用三个振荡射流阵列作为二次流的条件下,H/R从0.5减小到0.43,控制效率提高近49%,与使用定常射流相比,使用振荡射流作为二次流,显著提高了控制效率,增强了控制稳定性;对比分析显示,使用两个或三个振荡二次流阵列、H/R为0.43且θ为90°时,矢量控制效果最好。进一步地研究表明,H/R和θ对矢量控制效率的影响最大,而θ对控制曲线线性度几乎没有影响,本文研究还发现二次流阵列个数低于两个或H/R高于0.6时,控制特性急剧恶化。本文研究可为同向流矢量喷管的工程设计提供理论支撑。The codirectional flow vector technology based on Coanda effect has high control efficiency and low thrust loss,and has great potential to improve the stealth performance of aircraft.To study the influence of parameters such as secondary flow type,the number of secondary flow arrays,Coanda surface radius R,and termination angleθon coflow vector control for Mach numbers of primary flow up to 0.35,the mechanical characteristics of 9 different nozzle models are studied by a force measurement experiment using balance,and the control law curve of vector deflection force varying with the mass flow ratio of secondary flow to primary flow is obtained.The results show that H/R is the most important factor for the efficiency and control stability of coflow thrust vector.Lower H/R leads to higher control efficiency and higher linearity of the control curve.The control efficiency is increased by nearly 49%when the H/R is reduced from 0.5 to 0.43 under the condition of using three sweeping jets as the secondary flow.Compared to using steady jets,the control efficiency and stability are improved significantly using sweeping jets as the secondary flow.The results show that the control performance is the best when using two or three sweeping jets as secondary flow with H/R of 0.43 andθof 90°.In addition,the results show that H/R andθhave the greatest impact on the control efficiency,whileθhas little impact on the linearity of the control curve.The results also show that the control characteristics deteriorate sharply when the number of secondary flows is less than 2 or H/R is higher than 0.6.The research results provide theoretical support for the engineering design of coflow thrust vector nozzles.

关 键 词：流体推力矢量控制 振荡射流 同向流 康达效应 康达壁面半径 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]