高压微孔圆柱液体射流破碎实验研究  

Experiment Study on The Break Up of High Pressure Capillary Round Liquid Jet

作　　者：龚辰[1] 陆金刚[1] 闫龙龙[1] 杨敏官[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《工程热物理学报》2015年第3期505-508,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51176065);江苏省研究生科研创新基金(No.CXZZ11_0567)

摘　　要：借助高速摄影及显微技术对高压微孔圆柱射流破碎过程进行可视化实验研究。结果表明:高速显微摄影能够清晰捕捉射流的细微结构特征,高压微孔射流沿流向破碎是渐变过程,可分为四个阶段,分别是,表面波动产生与发展阶段、液滴开始剥离且射流直径显著减小阶段、射流开始断裂阶段、独立液块形成阶段。实验结果表明,高雷诺数下湍流引入的流场脉动不遵循瑞利模式下表面波的线性增长和端部破碎的规律。Visualization on the break up process of high pressure capillary round liquid jet is present here.Capture the process with the help of high-speed and microscopy photography.The results show that the process of the jet break up can be divied into four parts:the generate and develop of the surface disturbulence,the remarkable decrease of the diameter of jet with the generate of the droplets,the break up of the jet and the formation of liquid block.The flow field fluctuation that intruduced by turbulence of high Reynolds numbers is not follow Rayleigh model.The linear growth of surface wave and the regulation of the jet break up are not follow Rayleigh model either.

关 键 词：高压微孔圆柱射流 显微高速摄影 破碎 

分 类 号：O358[理学—流体力学]