剪切同轴式喷嘴中心管壁厚对火焰的影响

推进技术 ›› 2008, Vol. 29 ›› Issue (3): 282-285.

剪切同轴式喷嘴中心管壁厚对火焰的影响

洪流,Oschwald M,仲伟聪

西北工业大学动力与能源学院陕西西安710072;德国宇航中心航天推进研究所;Hardthausen D-74239;陕西动力机械设计研究所陕西西安710100

发布日期:2021-08-15

Numerical and experimental investigation on edge diffusion effect of shear coaxial injector

School of Power and Energy,Northwestern Polytechnical Univ.,Xi’an 710072,China;Space Propulsion Inst.,German Aerospace Center,Hardthausen D-74239,Germany;Shaanxi Power Machinery Inst.,Xi’an 710100,China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究剪切同轴式喷嘴中心管壁厚度对火焰的影响,针对LOX/CH4火焰,采用数值方法计算了三种不同喷嘴中心管壁厚的长方体形燃烧室内的燃烧过程,计算表明,对于较大的管壁厚度,在紧贴管壁下游的区域将形成较大的回流区,有利于火焰稳定在喷嘴出口处,还给出了采用相同几何结构燃烧室的LOX/CH4燃烧试验结果,试验也得出了同样的趋势,随着中心管壁厚度的增加,火焰中心明显前移。

关键词: 同轴式喷嘴;火焰稳定性;液氧;甲烷;台阶扩散效应

Abstract: To study the edge diffusion effect of shear coaxial injector on the LOX/Methane flame,numerical simulation and experimental investigation on the flame attachment were performed at different LOX post wall thickness.Numerical simulation results show that greater wall thickness causes larger recirculation zone at the downstream of the LOX post,which is beneficial for flame attachment.Experimental results show the same tendency.

Key words: Shear coaxial injector;Flame stability;Liquid oxygen;Methane;Edge diffusion effect

洪流,Oschwald M,仲伟聪. 剪切同轴式喷嘴中心管壁厚对火焰的影响[J]. 推进技术, 2008, 29(3): 282-285.