Wake Flow Investigation on Notchback MIRA Model by PIV Experiments

Yingchao Zhang, Jinji Li, Zijie Wang, Qiliang Wang, Hongyu Gong and Zhe Zhang
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Yingchao Zhang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130015, China
Jinji Li: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130015, China
Zijie Wang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130015, China
Qiliang Wang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130015, China
Hongyu Gong: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130015, China
Zhe Zhang: State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130015, China

Energies, 2021, vol. 14, issue 15, 1-21

Abstract: To deepen our understanding of the flow field and flow mechanism of a car-like model, in this paper, an experimental investigation of the flow field of MIRA notchback 1/8 scale model is carried out using Particle Image Velocimetry (PIV) method. The tests are conducted in an open circuit wind tunnel at a Reynolds number of 9.16 × 10 5 . In order to obtain the detailed flow field structure of the notchback model, the PIV method was used to capture the flow field images from three orthogonal directions. By studying the vorticity and velocity vector figures of both the time-averaged and instantaneous states, a three-dimensional flow field schematic of the notchback model is summarized, and the formation mechanism and development process of the vortices are analyzed. This study not only provides an intuitive display of the three-dimensional flow field structure of the MIRA notchback model but, more importantly, it provides a reference for the development of automobile aerodynamic drag reduction by analyzing the flow mechanism, which is beneficial to energy conservation.

Keywords: PIV method; MIRA notchback model; 3D flow structure (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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