加力燃烧室用锯齿冠状混合器混合特性数值研究  

Numerical study on the mixing characteristics of chevron mixers for the afterburner

作　　者：王亚盟[1] 张靖周[1] 高家春[2] 单勇[1] 刘涛[2] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]中国航空工业集团公司沈阳发动机设计研究所,沈阳110015

出　　处：《航空动力学报》2011年第1期72-77,共6页Journal of Aerospace Power

基　　金：航空科学基金(2008ZB0607)

摘　　要：通过三维计算流体动力学（CFD）数值计算,研究了加力燃烧室中三种不同型式的锯齿冠状混合器及环形混合器的掺混性能.结果表明：①锯齿冠状混合器下游形成了流向涡阵列,锯齿布置和倾角对其尺度和强度有较大的影响;②相邻锯齿交错布置的锯齿冠混合器的强化掺混效果最为显著且流动损失相对较低,总压恢复系数相对环形混合器降低在0.2%以内,在其作用下,加力燃烧室火焰稳定器前的外涵气流温度提高100~150 K左右.Three-dimensional computational fluid dynamics（CFD） computations were conducted to analyze the mixing characteristics of three types of chevron mixers and the confluent mixer used in the afterburner.The research results obtained in the present conditions show that：（1） an array of stream-wise vorticity could be induced by chevron mixers,and the stream-wise vorticity scale and intensity are affected seriously by the chevrons arrangement and inclined angle;（2） the chevron mixer with chevrons tilted alternately inward and outward demonstrates the best performance with higher thermal mixing efficiency and lower extra pressure loss,the total pressure recovery coefficient decreases 0.2% compared to confluent mixer,and the mixing flow temperature increases about 150K in front of flameholder by enhancing the mixing process between core flow and bypass flow.

关 键 词：齿冠状混合器 加力燃烧室 掺混 数值计算 混合特性 

分 类 号：V231.9[航空宇航科学与技术—航空宇航推进理论与工程]