燃烧室中的非线性声波  

Nonlinear acoustic wave in combustors

作　　者：黄玉辉[1] 王振国[2] 周进[2] 

机构地区：[1]第二炮兵第四研究所,北京100085 [2]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《推进技术》2002年第6期492-495,共4页Journal of Propulsion Technology

基　　金：国家自然科学基金资助项目(19882008)

摘　　要：采用计算流体力学(CFD)方法对燃烧室一维冷流和两维燃烧过程进行了数值仿真,着重研究了温度、密度、熵等变量的脉动与压力脉动的区别,以及喷射过程与声学振型的耦合。结果表明,压力和速度主要表现声特征,温度和密度部分表现声特征,部分表现流特征,而熵则只表现流特征。对于化学反应过程激发的燃烧振荡,最容易受到激发的振型是压力波腹与化学反应分布相关最强的振型。One and two dimensional combustions in combustors were numerically simulated by Calculation Fluid Dynamics (CFD) . The transmitting processes of temperature pulse, density pulse, entropy pulse, velocity pulse and pressure pulse were studied , and the coupling between the injecting process and acoustic modes was investigated. The results indicate that the transmitting processes of pressure pulse and velocity pulse mainly show acoustic characteristics, while the temperature pulse and density pulse partly show acoustic characteristics, partly show flow characteristics, and the transmitting process of entropy pulse only show flow characteristics. For the combustion instability driven by chemical reactions, the most inspirable acoustic mode is the one whose wave abdomen is the most correlative with chemical reaction distribution.

关 键 词：液体推进剂火箭发动机 燃烧室 燃烧稳定性 非线性声学 数值仿真 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]