旋翼尾流对空空导弹的气动干扰研究

直升机发射导弹时,旋翼尾流对导弹产生很强的气动干扰,研究旋翼尾流对导弹的气动干扰对于改进机载导弹发射技术具有重要意义。结合动量理论和涡流理论,推导了桨叶环量方程,用广义尾流模型计算了旋翼下洗流场。并在此基础上用工程方法计算了有旋翼尾流干扰和无旋翼尾流干扰两种条件下的某空空导弹气动特性,揭示了旋翼尾流对导弹的气动干扰规律,为直升机载导弹的发射控制提供了参考依据。

Study on Aerodynamic Interference of Rotor Down- Wash Flow on a Air- to- Air Nissile

When a missile is launched form a helicopter, it will get the strong aerodynamic interference exerted by the rotor down-wash flow. Studying the aerodynamic interference of a helicopter rotor down-wash flow on the missile, is very important to improve the launch technique of the missile carried by a helicopter. Combining momentum theory and vortex theory, rotor circulation equation is deduced. The rotor down-wash flowfield is calculated using generalized down-wash flow model. On this basis, the air-to-air missile aerodynamic characteristic is calculated on both the conditions with and without rotor down-wash flow by means of engineering method. The rule of aerodynamic interference on a missile exerted by the rotor down-wash flow is posted. A reference is provided for the helicopter loading missile launch control.