锥形叶片旋转空化器数值仿真研究  

Numerical Simulation of Wedge-shape Blade Rotating Cavitator

作　　者：姚立明[1,2] 赵孟石 李倩 郑智颖 姚鸿宾[1] 李大尉 裴禹[1] YAO Li-ming;ZHAO Meng-shi;LI Qian;ZHENG Zhi-ying;YAO Hong-bin;LI Da-wei;PEI Yu(Laboratory of Electromechanical Technology, Institute of High Technology, Heilongjiang Academy of Sciences, Harbin 150020, China;Harbin High-technology Transfer and Incubation Center to Russia, Harbin 150028, China;School of Energy and Power Engineering, Notheast Electric Power University, Jilin 132012, China;School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

机构地区：[1]黑龙江省科学院高技术研究院机电技术研究室,黑龙江哈尔滨150020 [2]哈尔滨对俄高端技术转移孵化中心,黑龙江哈尔滨150028 [3]东北电力大学能源与动力工程学院,吉林吉林132012 [4]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《节能技术》2020年第4期299-303,共5页Energy Conservation Technology

基　　金：中央引导地方科技发展专项(ZY18C06):涡流空化法制备石墨烯技术研究及关键设备研制;黑龙江省科学院科学研究基金(KY2018GJS01):水力空化技术对水煤浆成浆特性的影响研究。

摘　　要：通过高速转动的叶片形空化器,可形成可控的超空泡。对于旋转超空泡的研究,非常重要而又十分复杂。本文采用数值仿真计算的方法,建立三维几何模型,采用Ansys Fluent软件进行模拟求解,对四叶片旋转空化器的工作特性进行分析。研究结果表明,旋转空化器形成的超空泡具有很强的规律性。在超空泡尾部具有明显的溃灭而形成向超空泡内部的射流,射流的产生使得超空泡尾部都具有内凹结构。在低转速下,旋转叶片尖端后部的回流使得超空泡无法覆盖叶片尖端,而随转速的增大超空泡逐渐覆盖叶片的尖端后部。旋转空化器转速的提升对超空泡的形成具有很明显的作用,形成的超空泡体积随转速呈指数增长。本文所得到的超空泡演变规律对旋转空化器的设计和应用都具有重要的参考意义。Controllable supercavitation can be formed by a blade-shaped cavitation rotating at a high speed.The study of rotating supercavitation is very important and very complicated.In this paper,the numerical simulation method is employed with a three-dimensional geometric model.The simulation is solved by Ansys Fluent,and the working characteristics of the four-blade rotating cavitator are analyzed.The results show that the supercavitation formed by the rotating cavitator has a strong regularity.There is a significant collapse at the tail of the supercavitation to form a jet into the interior of the supercavitation,and the generation of the jet causes the supercavitating tail to have a concave structure.At low rotating speeds,the backflow at the back of the tip of the rotating blade prevents the supercavitation to cover the blade tip,and as the rotating speed increases,the supercavitation gradually covers the back of the tip of the blade.The increase of the rotating speed of the rotating cavitator has a significant effect on the formation of supercavitation,and the volume of supercavitation increases exponentially with the rotational speed.The evolution rule of supercavitation obtained in this paper has important reference significance for the design and application of rotary cavitation.

关 键 词：旋转空化器 锥形叶片 超空泡 数值模拟 空泡体积 

分 类 号：TK019[动力工程及工程热物理]