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Drag reduction of an ahmed body using combined steady blowings

  • K. Liu
  • , B. F. Zhang
  • , Y. Zhou*
  • *Corresponding author for this work
  • China Aerodynamics Research and Development Center
  • Harbin Institute of Technology Shenzhen
  • Hong Kong Polytechnic University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Active drag reduction of an Ahmed body with slant angle of 25° has been experimentally investigated at a Reynolds number Re of 1.67 × 105, based on the square root of the body cross-sectional area. A combination of steady blowing is deployed along the upper and two side edges of the rear window and the upper edge of the vertical base, resulting in a maximum reduction in drag by 25%, which is higher than those reported in the literature for the same body. Measurements are conducted using particle image velocimetry. A marked modification is identified on the separation region over the rear window, the upper and lower recirculation bubbles behind the vertical base, and the C-pillar vortices, which is connected to the high drag reduction.

Original languageEnglish
Title of host publicationFluid-Structure-Sound Interactions and Control- Proceedings of the 4th Symposium on Fluid-Structure-Sound Interactions and Control, 2019
EditorsLixi Huang, Motoaki Kimura, Guoyi Peng, Yu Zhou, A.D. Lucey
PublisherPleiades Publishing
Pages63-68
Number of pages6
ISBN (Print)9789811075414
DOIs
StatePublished - 2019
Externally publishedYes
Event4th Symposium on Fluid-Structure-Sound Interactions and Control, FSSIC 2017 - Tokyo, Japan
Duration: 21 Aug 201724 Aug 2017

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

Conference4th Symposium on Fluid-Structure-Sound Interactions and Control, FSSIC 2017
Country/TerritoryJapan
CityTokyo
Period21/08/1724/08/17

Keywords

  • Ahmed body
  • Combined actuations Steady blowing
  • Drag reduction

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