摘要
采用贴体曲线网格、RNG k-ε湍流模型和随机轨道法计算了火焰筒内的喷雾两相流动 ,构造了包括旋流器在内的主燃烧室计算网格 ,计算了 5种旋流器下的主燃烧室的气流场和喷雾场 ,分析了不同旋流器对喷雾场和气流场的影响 ,以及喷雾对气流场的影响 ,并与实验结果进行了对比。结果显示旋流器叶片角度增大或者外内旋流器流量比的增加 ,都会导致液滴的喷雾锥角增大。喷雾使气流场的速度减小 ,旋流强度降低 ,随着旋流器叶片角度增加或者外内旋流器流量比的增加 ,喷雾场对气流场的影响增大。
The body fitted grid, RNG k-Ε turbulence model and stochastic particle trajectory model were used in numerical simulation of two-phase flow in an aeroengine combustor. Five three-dimensional body-fitted girds were generated. Two-phase flow fields in the combustor with different kinds of swirlers were simulated numerically. The effects of the swirler on spray and effects of droplets on airflow were studied. The results show that the increase of the vane angle of a swirler or the increase of ratio of the outer/inner mass flow of the swirler results in the increase of spray angle, and the velocity and swirling strength of air flow decreases due to the existence of spray. The results are in agreement with the experimental data reasonably.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2001年第4期230-234,共5页
Journal of Combustion Science and Technology
基金
国家科技重点实验室基金资助项目 (97JS48.6.IZ480 3)
关键词
燃烧室
喷雾
数值计算
两相流
Combustors
Computational fluid dynamics
Computer simulation
Spraying
Turbulent flow
