MIRA快背式模型主动减阻研究  

Research on Active Drag Reduction of MIRA Fastback Model

作　　者：张英朝[1] 郑镇雨 吴开广 张喆[1] Zhang Yingchao;Zheng Zhenyu;Wu Kaiguang;Zhang Zhe(Jilin University, State Key Laboratory of Automotive Simulation and Control, Changchun 130022)

机构地区：[1]吉林大学,汽车仿真与控制国家重点实验室,长春130022

出　　处：《汽车工程》2020年第5期588-592,共5页Automotive Engineering

基　　金：国家自然科学基金(11772140)资助。

摘　　要：参考被动减阻的机理,在MIRA车身的几个位置设置射流口实现射流吹气,以达到降低模型迎风面压力或增大背风面压力的目的。对比MIRA原模型瞬态仿真与试验结果,验证了仿真的准确性。对几个射流工况和原模型的瞬态仿真结果进行对比分析。通过阻力系数、表面静压系数和方向涡量的对比,确认了局部射流的减阻效果。最终实现气动阻力系数降低16.3%。By referring to the mechanism of passive drag reduction,jet ports are set in several positions of MIRA body to realize jet air blowing,so as to reduce the pressure on the windward side of the model or increase the pressure on the leeward side.The simulation accuracy is verified by comparing the transient simulation and experimental results of the original MIRA model.The transient simulation results of several jet flow conditions and original model are compared and analyzed.By comparing drag coefficient,surface static pressure coefficient and directional vorticity,the drag reduction effects of local jet flow are ascertained,and a 16.3%reduction of drag coefficient is achieved in the end.

关 键 词：MIRA快背式模型 格子-玻尔兹曼方法 VLES 流动控制 射流减阻 

分 类 号：U46[机械工程—车辆工程]