Large eddy simulation of base drag reduction using jet boat tail passive flow control

Yang, Yunchao; Bartow, William; Zha, Gecheng; Xu, He-Yong; Wang, Jianlei

doi:10.1016/j.compfluid.2019.104398

Cited by 4 publications

(1 citation statement)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the features of long bluff body and square geometry, the negative pressure zone and high energy loss in the wake region emerge as a result of the flow separation caused by the square edge around the rear surface. The total pressure loss in the wake area creates a region with low pressure and low momentum on the rear surface that generates a large pressure drag (Yang et al , 2019). Because the freight property require that the container must maintain a square shape, it is difficult to apply the streamlined drag reduction strategy at the end of trucks.…”

Section: Introductionmentioning

confidence: 99%

Enhancing turbulence: a potential strategy for drag reduction based on ground transportation systems (GTS) model

Yang

Liu

2021

HFF

View full text Add to dashboard Cite

Purpose The purpose of this paper is to investigate the mechanism and performance of a potential strategy, which is to enhance turbulence to carry out drag reduction for heavy trucks. Design/methodology/approach Enhancing turbulence deflector (ETD) was placed on the roof surface of an ground transportation system (GTS) to investigate the drag reduction mechanism of enhancing turbulence. Transition shear-stress transport improved delay detach eddy simulation model was adopted to simulate the unsteady small-scale flow around the ETD. Findings By optimizing the three influencing factors, diameter, streamwise length and streamwise position, the optimized ETD has achieved a maximum drag reduction of 7.04%. The analysis of flow field results shows that enhancing turbulence can effectively suppress flow separation and reduce the negative pressure intensity in the wake region of GTS. Originality/value The present work provides another potential possibility for the improvement of the aerodynamic performance of heavy trucks.

show abstract

Section: Introductionmentioning

confidence: 99%