Abstract: In order to obtain the characteristic of the velocity coupled response function，a new method of measuring the velocity-coupling response of aluminum solid propellants by using T burner is proposed，and through which the velocity-coupling response characteristics are examined when oscillation frequency is set about175Hz and pressure is set about 6.5MPa. The results show that，firstly，the characteristic of the velocity-coupling response is obviously different from the pressure-coupling response，and the value of the pressure-coupling is positive in the whole acoustic field in the chamber，but the value of the velocity-coupling could be either positive or negative in the acoustic field. Secondly，under the test conditions，the velocity-coupling response value is much larger than the pressure-coupling response value. Thus，for the nonlinear combustion instability in the sol. id rocket motor，the velocity-coupling response plays an important role that cannot be neglected. Finally，this method can be used to measure the coupling response function of both velocity and pressure at same time，which can be better used to analyze the combustion response characteristics of the aluminum solid propellant. Thus，this method can provide an important experimental technique for the analysis of the nonlinear combustion instabilityproblem of solid rocket motor.

Key words: Nonlinear combustion instability； Solid propellant； T-burner technology； Combustion re. sponse；Velocity-coupled response function

摘要： 为获得固体推进剂速度耦合响应特性，基于 T型燃烧器测量技术，建立了一种测量含铝复合推进剂速度耦合响应函数的实验方法，并在工作压强为 6.5MPa和振荡频率约为 175Hz条件下，开展了响应特性实验研究。实验结果表明:速度耦合与压强耦合有明显的不同，压强耦合在整个振荡区域内均表现出增益作用，而速度耦合在不同振荡区域内可表现出增益作用，也可以表现出抑制作用；在本文的工况参数条件下，速度耦合响应函数值远大于压强耦合响应函数值。在固体火箭发动机非线性燃烧不稳定中，速度耦合响应是不可忽略的重要影响因素。本文所建立的实验方法能在测量速度耦合响应函数的同时获得压强耦合响应函数，可更好地分析固体推进剂的燃烧响应特性。因此，该方法为分析固体火箭发动机非线性燃烧不稳定问题提供了重要的实验手段。

关键词: 非线性燃烧不稳定 ;固体推进剂； T型燃烧器技术 ;燃烧响应 ;速度耦合响应函数