Structure of turbulence in channel flow with a fully transpired wall

Zhiqun Deng, Ronald Adrian, Christopher D. Tomkins

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The structure of turbulence in a channel flow with a fully transpired wall has been investigated experimentally. 2D Particle Image Velocimetry is used to measure the instantaneous flow fields within the channel for three different porous surfaces: 1/4′ honeycomb, foam (used as the direct porous interface and attached to a 1/4″ honeycomb) and 1/8″ honeycomb. Mean flow properties and statistics are obtained by analyzing the instantaneous measurements. Comparison with analytical and computational results is made. It is found that the boundary conditions on the porous surface are very important to the internal core flow evolution and flow pattern. For a coarse porous surface (in this paper, 1/4″ honeycomb), the mean flow differs significantly from the classical laminar solution and computational results, and much more turbulent shear stress is indicated. However, with small pore size (in this paper, 1/8′ ′ honeycomb), the mean velocity profiles are very close to the laminar solution for a considerable downstream length, even though large turbulence intensity (5%) is observed. Therefore, profound modification of the flow structure can occur due to the effect of non-ideal wall boundary conditions on the porous surface. In addition, the location where the maximum RMS turbulence intensity occurs moves closer to the porous surface with increasing downstream position.

Original languageEnglish (US)
Title of host publication39th Aerospace Sciences Meeting and Exhibit
StatePublished - 2001
Externally publishedYes
Event39th Aerospace Sciences Meeting and Exhibit 2001 - Reno, NV, United States
Duration: Jan 8 2001Jan 11 2001

Other

Other39th Aerospace Sciences Meeting and Exhibit 2001
CountryUnited States
CityReno, NV
Period1/8/011/11/01

Fingerprint

channel flow
Channel flow
Turbulence
turbulence
flow distribution
boundary condition
Boundary conditions
core flow
boundary conditions
flow structure
Flow structure
particle image velocimetry
velocity profile
foam
foams
flow pattern
Velocity measurement
Flow patterns
flow field
shear stress

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Deng, Z., Adrian, R., & Tomkins, C. D. (2001). Structure of turbulence in channel flow with a fully transpired wall. In 39th Aerospace Sciences Meeting and Exhibit

Structure of turbulence in channel flow with a fully transpired wall. / Deng, Zhiqun; Adrian, Ronald; Tomkins, Christopher D.

39th Aerospace Sciences Meeting and Exhibit. 2001.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Deng, Z, Adrian, R & Tomkins, CD 2001, Structure of turbulence in channel flow with a fully transpired wall. in 39th Aerospace Sciences Meeting and Exhibit. 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States, 1/8/01.
Deng Z, Adrian R, Tomkins CD. Structure of turbulence in channel flow with a fully transpired wall. In 39th Aerospace Sciences Meeting and Exhibit. 2001
Deng, Zhiqun ; Adrian, Ronald ; Tomkins, Christopher D. / Structure of turbulence in channel flow with a fully transpired wall. 39th Aerospace Sciences Meeting and Exhibit. 2001.
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