摘要
通过动态压力测量、化学自发荧光相同步测量的方法对自激振荡燃烧动力学过程进行了实验研究,分析了不同空气流量、化学当量比和边界条件对振荡燃烧过程的影响.实验结果显示,燃烧热负荷的提高会导致燃烧段压力脉动幅值的提高,使燃烧更加不稳定.化学当量比越接近熄火极限,压力脉动的频率越高.同时燃烧室进出口边界条件的改变也会对振荡频率产生影响.
Combustion instabilities were studied experimentally by coupling unsteady heat release and pressure perturbations.In this paper,the experimental studies were conducted to analyze the dynamic processes of self-excited combustion oscillations through dynamic pressure and phase-locked chemiluminescence measurements.The effects of air mass flow,equivalence ratio and boundary conditions on combustion system were examined.This shows that the amplitudes of oscillation will enlarge with the increasing system load,leading to more unstable combustion.Moreover,the higher modes of oscillation frequency may occur when the combustion operation is closer to lean limits.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2011年第1期28-34,共7页
Journal of Aerospace Power
基金
国家重点基础研究发展计划(2007CB210106)
关键词
燃气轮机燃烧室
贫预混预蒸发燃烧
振荡燃烧
动态测量
相同步测量
gas turbine combustor
lean premixed prevaporized combustion
combustion instabilities
dynamical measurement
phase-locked measurement
