高电压技术2017，Vol.43Issue(12)：3981-3987,7.DOI:10.13336/j.1003-6520.hve.20171127022
当量比对超声速燃烧室等离子体点火流场及燃烧特性影响
Effect of Equivalence Ratio on Flow Field and Combustion Characteristics of Plasma Ignition in Supersonic Combustor
窦志国 1刘毅 1张鹏 1杨波2
作者信息
- 1. 装备学院激光推进及其应用国家重点实验室,北京101416
- 2. 63819部队,宜宾644000
- 折叠
摘要
Abstract
In order to understand the combustion organization and performances in a supersonic combustor by plasma jet ignition,we numerically investigated the plasma jet ignition in supersonic combustor.Moreover,we calculated the effects of the gas mixture equivalence ratio on the combustion efficiency,flow field characteristics,distribution of wall pressure and combustion products,and total pressure loss by adjusting the fuel injection pressure to reach a certain equivalence ratio value.The results show that increasing the gas mixture equivalence ratio will reduce the combustion efficiency;The region between cavity front wall and plasma jet is the most fierce combustion reaction with the highest temperature,the heat release region of combustion reaction increases and cavity temperature decreases as the gas mixture equivalence ratio rises from 0.138 to 0.311,however,the heat release region of combustion reaction decreases and the combustion reaction occurs in downstream cavity when the gas mixture equivalence ratio is 0.485 and 0.624.The rising point of combustor top wall pressure moves towards upstream and the value of pressure increases as the gas mixture equivalence ratio increases;The total pressure loss in the combustor is mainly caused by the oblique shock wave by fuel jet,airstream,and heat release of combustion.Increasing the gas mixture equivalence ratio will enhance the total pressure loss caused by the oblique shock,but the total pressure loss in the combustor is mainly caused by the heat release of combustion.The more fierce combustion reaction is,the bigger the total pressure loss will be.关键词
等离子体点火/超声速燃烧室/当量比/燃烧效率/总压损失Key words
plasma ignition/supersonic combustor/equivalence ratio/combustion efficiency/total pressure loss引用本文复制引用
窦志国,刘毅,张鹏,杨波..当量比对超声速燃烧室等离子体点火流场及燃烧特性影响[J].高电压技术,2017,43(12):3981-3987,7.
