基于PERA SIM Fluid的Ahmed类车体气动阻力研究  

Aerodynamic Drag Analysis of Ahmed Body Based on PERA SIM Fluid

作　　者：崔亮[1] CUI Liang(PERA Global,Beijing100025,China)

机构地区：[1]安世亚太科技股份有限公司,北京100025

出　　处：《工业技术创新》2023年第6期19-27,共9页Industrial Technology Innovation

摘　　要：本文以Ahmed类车体模型为研究对象,使用安世亚太自主研发的通用流体动力学仿真软件PERA SIM Fluid进行建模和仿真,研究了后背倾角为0°、12.5°、25°和35°的气动阻力特性。PERASIMFluid计算得到的车体尾部附近流线,和文献中不同后背倾角下的流线拓扑结构图相一致,验证了仿真结果的合理性。PERA SIM Fluid计算得到的阻力系数以及对称面上的X方向速度分量,也和文献中的风洞试验数据进行了对比,得到了相一致的结果,验证了软件的计算精度。本次研究的过程也表明了PERA SIM Fluid软件已经具备了易用性、可靠性和高精度的特点,是一款成熟的通用流体动力学仿真软件。In this paper,the Ahmed body model is taken as the research object,and the aerodynamic drag characteristics of the back inclination angles of 0,12.5,25 and 35 are studied by using PERA SIM Fluid,a general fluid dynamics simulation software independently developed by PERA Global.The streamline near the rear of the car body calculated by PERA SIM Fluid is consistent with the streamline topological structure diagram under different back inclination angles in the literature,which verifies the rationality of the simulation results.The drag coefficient calculated by PERA SIM Fluid and the X-direction velocity component on the symmetry plane are also compared with the wind tunnel test data in the references,and the consistent results are obtained,which verifies the calculation accuracy of the software.The process of this research also shows that PERA SIM Fluid software has the characteristics of ease of use,reliability and high precision,and it is a mature general fluid dynamics simulation software.

关 键 词：Ahmed类车体 气动阻力 PERA SIM Fluid 计算精度验证 

分 类 号：TB126[理学—工程力学]