摘要
为了研究工况压力对分层火焰系统中压力振荡频率的影响,通过实验方法测量了不同工况压力下分层火焰燃烧系统中的压力振荡特性,通过基于火焰响应模型的理论分析方法研究了压力振荡频率变化的原因。实验测试结果表明,当进口压力降低从2.6MPa降低至1.4MPa时,压力振荡频率具有规律性的减小约4%;而相对振荡幅值保持在0.2~0.3范围内,没有明显的规律。火焰响应模型的计算结果显示,雾化过程对火焰的响应特性影响最大。
In order to study the effects of operating pressure on the dynamic pressure oscillation in the stratified flames system,pressure oscillation characteristics in stratified flames system under different operating pressure were monitored experimentally. Then the reason leading to the change of pressure oscillation was analyzed based on a flame response model. The dominant frequency of pressure oscillation regularly decreased by 4% with the operating pressure decreasing from 2.6MPa to 1.4MPa,while the pressure oscillation amplitude normalized with operating pressure remained in the range of 0.2~0.3 without obvious rule. The computing results of flame response model show that the spray evaporization process dominated the flame response properties compared with other physical processes.
作者
秦皓
林宇震
李继保
QIN Hao LIN Yu-zhen LI Ji-bao(School of Energy and Power Engineering, Beihang University, Beijing 100191, China Commercial Aircraft Engine Company Limited, Aviation Industry Corporation of China, Shanghai 200241, China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2016年第10期1882-1892,共11页
Journal of Propulsion Technology
关键词
分层火焰
工况压力
火焰响应模型
Stratified flames
Operating pressure
Flame response model
