【摘要】 基于Tsuji燃烧器模拟研究了常重力与微重力下超细水雾与二维对冲火焰作用的异同点,验证常重力下的试验结果对于微重力环境下的适用性.结果表明:无细水雾作用时,低应变率下火焰温度和位置对于重力较为敏感;细水雾作用后,高应变率下火焰温度对重力较为敏感.随着细水雾粒径的增大,重力和浮力对于粒子运动的影响逐渐增大.在常重力、低风速下使用较高浓度的小粒径水雾进行试验的结果对微重力下的情况有一定参考价值.更多还原

【Abstract】 This paper simulated the interaction between superfine water mist and 2-D counter-flow flame under both normal and micro gravity based on Tsuji-burner,and the results were compared.The goal was to find the conditions in which the results of normal gravity experiments could be applied to microgravity environment.The results showed that for low strain rate flame,flame temperature and position were more sensitive to gravity when no water mist was applied.For high strain rate flame,however,flame temperature was more sensitive to gravity when water mist was applied.As the droplet diameter of water mist increased,the influences of gravity and buoyancy gradually increased.It is suggested that low wind speed,high mass load,and small droplet diameter of water mist are the prerequisite for applying the experimental results under normal gravity to microgravity environment.更多还原