The Effect of Dilution Air Jets on Aero-Engine Combustor Performance

被引：15

作者：

Xiao, Yinli ^{[1
]}

Cao, Zhibo ^{[1
]}

Wang, Changwu ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Engine & Energy, Xian 710072, Shaanxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF TURBO & JET-ENGINES | 2019年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

dilution air jet; aero-engine combustor; three-dome combustor sector; flamelet;

D O I：

10.1515/tjj-2018-0045

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

In aero-engine combustor, the primary and secondary dilution air jets play a vital role to achieve efficient combustion and provide a satisfactory temperature profile at the combustor exit. In the current research, seven kinds of three-dome combustor sector associated with different dilution holes arrangements are simulated using Flamelet model. The influences of location, number and diameter of dilution air holes on flow field and performance of combustor are analysed in detail. The results demonstrate that the variation of airflow distribution, while keeping the total admission area constant, impact the combustion efficiency and pattern profile considerably, yet has insignificant effect on the total pressure coefficient. The maximum combustion efficiency and minimum pattern factor can be achieved simultaneously with deliberate dilution jet holes arrangement.

引用

页码：257 / 269

页数：13