一种三通道进气先进旋涡燃烧室性能数值分析

Numerical Analysis of the Performance of a Three Channel Intake Advanced Swirl Combustor

为提高燃烧室性能,提出了一种三通道进气先进旋涡燃烧室(AVC),并对不同进气结构参数、后钝体高度H_2、腔体宽度L等的燃烧室性能进行了模拟。结果表明,在L/H_1=0.4~0.5、H_2/H_1=0.4~0.7及L/H_1=0.6~0.7、H_2/H_1=0.4~0.5的范围内(其中H_1为前钝体高度),AVC能形成稳定的双涡对结构。在研究范围内,燃烧室的总压损失系数及燃烧效率随H_2/H_1增大呈现先减小后增大的趋势;三通道进气AVC较双通道进气AVC,燃烧效率增加了11.59%,总压损失系数仅增加了0.12%。

A three channel intake advanced swirl combustor（ AVC ）was proposed to improve the performance of the combustor, and the performances of the eombustor with different intake structure parameters, different heights of rear bluff H2 and different cavity width L were simulated. The results showed that the AVC could form a stable dual-vortex pair structure in the range of L/H1 =0. 4 ~0. 5, H2/H1 =0. 4 ~ 0. 7 and L/H1 = 0. 6 ~ 0. 7, H2/H1 = 0. 4 - 0. 5 （ where H1 was defined as the height of front bluff）, and AVC could form a stable dualvortex pair structure. In the research area, the total pressure loss coefficient and combustion efficiency of combustor showed a tendency to decrease first and then increase with the increase of H2/H1. Compared with double channel intake AVC, the combustion efficiency of the three channel intake AVC increased by 11.59% , and the total pressure loss coefficient increased by only 0. 12%.