液体射流在旋转气体中分裂破碎机理研究  

Study of mechanism of breakup of a liquid jet in swirling gas

作　　者：严春吉[1] 解茂昭[2] 殷佩海[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026 [2]大连理工大学动力工程系,辽宁大连116024

出　　处：《大连理工大学学报》2004年第5期657-661,共5页Journal of Dalian University of Technology

摘　　要：研究了旋转气流中空心柱液体射流的流动参数、喷嘴几何因素在液膜分裂破碎过程中的不稳定性作用.结果表明:液膜的分裂破碎主要是由表面张力引起的;液体Reynolds数在整个射流过程中起不稳定性的作用;在旋转气流中,内部气动力及内部旋转强度的变化,对液体射流的不稳定性没有影响,而外部气动力及外部旋转强度在液体射流的破碎过程中起着稳定性的作用;在旋转气流中,射流内半径与液膜厚度比起稳定性的作用.Effects of flow properties and nozzle geometry on the instability of the annular liquid sheet in swirling gas are investigated. The results are as follows: the breakup of liquid film is mainly caused by the surface tension; the liquid Reynolds number always acts on the instability in the process of the jet; the aerodynamic force and the swirling intensity of the air in the interior of the hollow cylinder have no effects on the stability of the jet, but those in the exterior of the hollow cylinder play stabilizing role in the liquid jet during the breakup; the ratio of radius of the nozzle to thickness of the liquid film exerts a stability in the process of a jet.

关 键 词：液体 射流 不稳定性 REYNOLDS数 旋转 分裂 液膜厚度 破碎机理 气体 研究 

分 类 号：O358[理学—流体力学]