突扩燃烧室低频燃烧不稳定主动控制实验研究  

Active control of low-frequency combustion instabilities in a dump combustor

作　　者：秦飞[1] 董飞 何国强[1] 刘佩进[1] 

机构地区：[1]西北工业大学航天学院,西安710072 [2]西安航天发动机厂,西安710100

出　　处：《固体火箭技术》2010年第5期496-501,共6页Journal of Solid Rocket Technology

基　　金：国家自然科学基金(No.50806062)

摘　　要：采用实验手段,开展了突扩燃烧室低频燃烧不稳定主动控制方法研究。进行了燃料脉冲喷射开环主动控制实验,发现燃料脉冲喷射所形成的周期性放热与压强振动反相时会明显削弱压强振动幅度,喷射相位角和占空比是影响控制效果的重要因素。通过调节参数实验,确定了较优的控制参数范围。建立了具有反馈的自适应闭环控制策略,通过实验验证了闭环主动控制是一种能有效抑制突扩燃烧室低频燃烧不稳定的方法。Control technology of low-frequency combustion instabilities was investigated with experiments.Combustion instability active control experimental system and control equipments were designed.Open loop active control for pulsed liquid fuel injection was studied.Results show that periodic heat release due to fuel pulse injection is responsible for suppressing pressure oscillations.While the periodic heat release is in reverse phase with pressure oscillation,amplitude is reduced obviously.It＇s concluded that injection phase angle is the leading factor of control effect.Suitable range of control parameters was obtained by means of parameter modulation.Adaptive closed-loop control strategy with feedback was established.The experiment results indicate that closed-loop active control is an effectual method for suppressing pressure oscillations in dump combustors.

关 键 词：低频燃烧不稳定 突扩燃烧室 实验 燃烧控制 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]