Effects of partial swirl on flow and combustion performance of afterburner

被引：0
|
作者：
Bi Y. [1 ]
Fan Y. [1 ]
Xiao F. [1 ]
Ma Z. [1 ]
Chen Y. [1 ]
机构：
[1] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2024年 / 45卷 / 02期
关键词：
Afterburner; Centrifugal force; Flow characteristics; High gravity combustion; Swirl flow;
D O I：
10.13675/j.cnki.tjjs.2210062
中图分类号：
学科分类号：
摘要：
To improve the organization of stable combustion difficulties of the advanced after-ramjet-burner，the local centrifugal force created by the partial inlet swirling inflow is utilized to enhance the mixing of fuel and air and accelerate the pilot flame propagation. The flow characteristics，combustion efficiency，ignition process and pilot flame development characteristics of partial swirling afterburner under different swirl inlet position and angles are studied by numerical simulation and experimental methods. Results show that the swirl inlet combination with multi zones and different swirl angles will increase the flow loss，but it can establish a local high gravity field to enhance the mixing of fuel and air and accelerate the flame propagation in the ignition process. Compared with the non-swirl inlet，the swirl inlet can increase the flame propagation velocity in the pilot zone. Furthermore，the swirl inlet can increase combustion efficiency by up to 2.35%. © 2024 Journal of Propulsion Technology. All rights reserved.
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