Drag reduction on the 25° Ahmed body using a new zero-net-mass-flux flow control method

被引：0

作者：

Wang, Bingxin ^{[1
]}

Yang, Zhigang ^{[1
]}

Zhu, Hui ^{[1
]}

机构：

[1] Tongji Univ, Shanghai Automot Wind Tunnel Ctr, Shanghai 201804, Peoples R China

来源：

THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS | 2019年 / 33卷 / 05期

关键词：

Active flow control; Periodic-forcing jet; Drag reduction; Ahmed body; ACTIVE CONTROL; SEPARATION; SIMULATION; WAKE;

D O I：

10.1007/s00162-019-00500-3

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Periodic-forcing jets are applied to form a zero-net-mass-flux actuator for active flow control study on the 25 degrees Ahmed body. Unlike traditional synthetic jet, this new proposed zero-net-mass-flux actuator has managed to divide the blowing phase and suction phase apart on different separation edges on the rear part of the body. Numerical simulation based on the large eddy simulation method is carried out on the near-wake flow to obtain both time-averaged and transient information of the flow field. The effects of the new actuators on the flow topology, the static pressure distribution and the process of the flow are analyzed to understand the mechanism of the drag reduction. Overcoming the drawbacks of the synthetic jet, our new zero-net-mass-flux actuator has successfully reduced the aerodynamic drag by a maximum of 25.5%.

引用

页码：411 / 431

页数：21

共 13 条

[1] Drag reduction on the 25∘\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^{\varvec{\circ }}$$\end{document} Ahmed body using a new zero-net-mass-flux flow control method
Bingxin Wang
Zhigang Yang
Hui Zhu
Theoretical and Computational Fluid Dynamics, 2019, 33 (5) : 411 - 431
[2] Active flow control on the 25° Ahmed body using a new unsteady jet
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INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2019, 79
[3] Aerodynamic drag reduction and flow control of Ahmed body with flaps
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[4] Near and far field laminar flow structures in an axisymmetric zero-net-mass-flux jet
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PHYSICS OF FLUIDS, 2020, 32 (12)
[9] Generic Transport Aft-body Drag Reduction using Active Flow Control
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Flow, Turbulence and Combustion, 2007, 78 : 365 - 382
[10] Numerical Simulation on Flow Control for Drag Reduction of Revolution Body Using Dimpled Surface
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Defence Technology, 2011, (01) : 59 - 64

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