基于CFD动网格的涡旋膨胀机工作腔内部流场模拟分析  

Simulation and Analysis of Flow Field in Working Chamber of a Moving Grid Scroll Expander Based on CFD

作　　者：张建立 邹辰辰 Zhang JianLi;Zou Chenchen(Tianjin Advanced Electromechanical System Design and Intelligent Control Key Laboratory,Tianjin University of Technology,Tianjin,300384;National Experimental Teaching Demonstration Center for Mechanical and Electrical Engineering,Tianjin University of Technology,Tianjin,300384)

机构地区：[1]天津理工大学天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]机电工程国家级实验教学示范中心(天津理工大学),天津300384

出　　处：《科技风》2022年第18期92-94,共3页

摘　　要：涡旋膨胀机运行过程中,工作腔内部流场状态参数难以通过试验测试获得。因此,以变径基圆渐开线型线的动、静涡旋盘为对象,建立了带有动边界、径向与轴向间隙的动、静涡旋盘啮合的三维流场数值模型[1]。利用CFD动网格技术设置流场边界、内部网格的变形,获得动、静涡旋盘啮合过程内部流场参数,结果表明:通过模拟结果可以得出膨胀机在工作腔内流体流动情况和温度和压力的分布规律,为涡旋膨胀机的设计提供了理论依据。The state parameters of flow field in the working chamber of scroll expander are difficult to be obtained by test.Therefore,taking the dynamic and static vortices with variable diameter base circle involute profile as the object,a three-dimensional numerical model of flow field meshing of the dynamic and static vortices with dynamic boundaries and radial and axial clearances was established[1].CFD dynamic mesh technology was used to set the flow field boundary and the deformation of the internal mesh,and the internal flow field parameters of the dynamic and static scroll meshing process were obtained.The results show that the fluid flow situation and the distribution law of temperature and pressure in the working chamber of the expander can be obtained through the simulation results.It provides a theoretical basis for the design of scroll expander.

关 键 词：涡旋膨胀机 CFD 动网格 

分 类 号：TH22[机械工程—机械制造及自动化]