A New Method to Optimize the Wake Flow of a Vehicle: The Leading Edge Rotating Cylinder

Abstract

The wake flow of a vehicle significantly influences its aerodynamic performance and the stability during high-speed drive. Therefore, optimization of the vehicle wake flow is an effective way to improve its aerodynamic performance and further improve the handling stability and fuel economy. In this paper, a new method, the leading edge rotating cylinder, is used to optimize the wake flow of a vehicle. According to the results of simulations, this method can reduce the pressure drag, increase the negative lift force, and strengthen the stability of the vehicle under crosswind. Furthermore, this method optimizes not only the wake flow of the vehicle with rotating cylinders but also the interactive vehicles in the driving route in overtaking maneuvers or platoon driving. In conclusion, this method effectively optimizes the flow fields around the vehicles, and it significantly helps to improve the handling stability and fuel economy of the vehicle.

A research into the flow and vortex structures around vehicles during overtaking maneuver with lift force included

“…This is a pressure-based dynamic simulation, which uses the realizable k-e turbulence model [15][16][17] and a nonequilibrium wall function. And the second-order implicit temporal scheme based on the semi-implicit method for pressure-linked equations (SIMPLE) method is established in this article.…”

Yan rüzgar koşullarında ön kısmı düz plakalı bir otobüs modeli üzerindeki direncin düşürülmesi

“…Shao vd. [10] ise tasarladıkları tekerlekli otobüs modelinin arka alt ve üst kenarlarının içerisine dönen silindirler yerleştirmişler ve bu aktif akış kontrol yönteminin aerodinamik performansı iyileştirebilme potansiyelini sayısal olarak test etmişlerdir.…”