Drag reduction control for blunt body in cross flow using flap actuators

Nobuhiko Kamagata, Akitoshi Matsui, Koichi Hishida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Active flow control, which can adapt to variable cross flow direction, is an effective technique to achieve drag reduction. The present study has investigated the effect of flap actuators to the blunt body and established a drag reduction control system for variation of cross flow direction. Numerical simulations were performed in order to obtain the optimal flap positions for drag reduction. A three force components transducer was introduced to measure drag force in order to investigate optimal flap angle to the flow direction. And flow structure around the body was examined using PIV (Particle Image Velocimetry). In this drag reduction system, flap actuators were controlled to the optical angle by detection of flow direction by investigation of non-separating flow, using pressure transducers as sensors. The flap actuators at the leading edge of the body promoted separated shear layer to approach to the body and lead to drag reduction at the optimal flap angle. Drag reduction rate is up to about 30%. This drag reduction control system adapted to variable cross flow direction raging from 0 to 40 deg. and reacted for drag reduction in 0.1 s.

Original languageEnglish
Pages (from-to)1742-1749
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume76
Issue number771
Publication statusPublished - 2010 Nov

Fingerprint

blunt bodies
drag reduction
Drag reduction
cross flow
Actuators
actuators
Control systems
Pressure transducers
shear layers
pressure sensors
Flow structure
particle image velocimetry
leading edges
Flow control
Velocity measurement
drag
Drag
Transducers
transducers
sensors

Keywords

  • Boundary layer
  • Flow control
  • Flow drag
  • Particle image velocimetry
  • Pressure distribution

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Drag reduction control for blunt body in cross flow using flap actuators. / Kamagata, Nobuhiko; Matsui, Akitoshi; Hishida, Koichi.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 76, No. 771, 11.2010, p. 1742-1749.

Research output: Contribution to journalArticle

@article{616320d5f12f4c9d8c33abf39af8cb7b,
title = "Drag reduction control for blunt body in cross flow using flap actuators",
abstract = "Active flow control, which can adapt to variable cross flow direction, is an effective technique to achieve drag reduction. The present study has investigated the effect of flap actuators to the blunt body and established a drag reduction control system for variation of cross flow direction. Numerical simulations were performed in order to obtain the optimal flap positions for drag reduction. A three force components transducer was introduced to measure drag force in order to investigate optimal flap angle to the flow direction. And flow structure around the body was examined using PIV (Particle Image Velocimetry). In this drag reduction system, flap actuators were controlled to the optical angle by detection of flow direction by investigation of non-separating flow, using pressure transducers as sensors. The flap actuators at the leading edge of the body promoted separated shear layer to approach to the body and lead to drag reduction at the optimal flap angle. Drag reduction rate is up to about 30{\%}. This drag reduction control system adapted to variable cross flow direction raging from 0 to 40 deg. and reacted for drag reduction in 0.1 s.",
keywords = "Boundary layer, Flow control, Flow drag, Particle image velocimetry, Pressure distribution",
author = "Nobuhiko Kamagata and Akitoshi Matsui and Koichi Hishida",
year = "2010",
month = "11",
language = "English",
volume = "76",
pages = "1742--1749",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "771",

}

TY - JOUR

T1 - Drag reduction control for blunt body in cross flow using flap actuators

AU - Kamagata, Nobuhiko

AU - Matsui, Akitoshi

AU - Hishida, Koichi

PY - 2010/11

Y1 - 2010/11

N2 - Active flow control, which can adapt to variable cross flow direction, is an effective technique to achieve drag reduction. The present study has investigated the effect of flap actuators to the blunt body and established a drag reduction control system for variation of cross flow direction. Numerical simulations were performed in order to obtain the optimal flap positions for drag reduction. A three force components transducer was introduced to measure drag force in order to investigate optimal flap angle to the flow direction. And flow structure around the body was examined using PIV (Particle Image Velocimetry). In this drag reduction system, flap actuators were controlled to the optical angle by detection of flow direction by investigation of non-separating flow, using pressure transducers as sensors. The flap actuators at the leading edge of the body promoted separated shear layer to approach to the body and lead to drag reduction at the optimal flap angle. Drag reduction rate is up to about 30%. This drag reduction control system adapted to variable cross flow direction raging from 0 to 40 deg. and reacted for drag reduction in 0.1 s.

AB - Active flow control, which can adapt to variable cross flow direction, is an effective technique to achieve drag reduction. The present study has investigated the effect of flap actuators to the blunt body and established a drag reduction control system for variation of cross flow direction. Numerical simulations were performed in order to obtain the optimal flap positions for drag reduction. A three force components transducer was introduced to measure drag force in order to investigate optimal flap angle to the flow direction. And flow structure around the body was examined using PIV (Particle Image Velocimetry). In this drag reduction system, flap actuators were controlled to the optical angle by detection of flow direction by investigation of non-separating flow, using pressure transducers as sensors. The flap actuators at the leading edge of the body promoted separated shear layer to approach to the body and lead to drag reduction at the optimal flap angle. Drag reduction rate is up to about 30%. This drag reduction control system adapted to variable cross flow direction raging from 0 to 40 deg. and reacted for drag reduction in 0.1 s.

KW - Boundary layer

KW - Flow control

KW - Flow drag

KW - Particle image velocimetry

KW - Pressure distribution

UR - http://www.scopus.com/inward/record.url?scp=79751480121&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79751480121&partnerID=8YFLogxK

M3 - Article

VL - 76

SP - 1742

EP - 1749

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 771

ER -