Ground clearance, rolling road, and scale effects on the wake of a bluff body: applications to pollutant dispersion in automotive engineering

本研究的目的是研究离地间隙对简化汽车模型下游发展的流动拓扑的影响。将研究不同的速度、比例模型(覆盖雷诺数高达300,000)和离地间隙。它们对Ahmed物体尾迹的影响将通过非侵入式(如LDA)和侵入性(如HWA和压力探头)测量技术获得的速度场和湍流场来分析。还将对不同的后倾角进行实验研究。这项研究还涉及到使用Ansys软件进行计算。计算结果将与实验结果(来自我们自己的测量或文献)进行比较。

The aim of this study is to investigate the ground clearance effects on the flow topology that is developed in the downstream of a simplified car model. Different velocities, scaled models (covering Reynolds numbers up to 300,000) and ground clearances will be studied. Their influence on the wake of the Ahmed body will be analysed from the velocity and turbulent fields obtained by non-intrusive (such as LDA) and intrusive (such as HWA and pressure probes) measurement techniques. Different rear slant angles will be also investigated experimentally. This study also involves computations using ANSYS software. The computational results will be compared with experimental results (from our own measurements or literature).