Turbulence in the core of a transpired channel

B. J. Balakumar, Ronald Adrian, Zhiqun Deng

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

Abstract

Flow in a fully transpired channel is examined using Particle-Image Velocimetry(PIV) to investigate the effect of stream-wise injection length scales on the core flow mean and turbulence properties. Instantaneous velocity fields are captured in a stream-wise - wallnormal plane at four different stream-wise locations (x/h=7,15,25,35) and four different porous surfaces: 3.175-mm, 4.7625-mm, 6.35-mm, 9.525-mm honeycombs. The 3.175-mm and 4.7625-mm honeycombs create smaller fluctuations in the wall-normal injection velocity and result in lower core turbulence. As a result, their mean flow profiles follow the inviscid Culick solution for a considerable distance downstream. The 6.35-mm and 9.525-mm honeycombs create higher wall-normal perturbations which get strongly amplified by the mean strain field resulting in a higher turbulence intensity downstream. As a result, their mean flow profiles deviate significantly from the Culick solution. It is found that the turbulence is profoundly affected by the mean details of the wall boundary conditions. In addition, for the first time, a database of turbulence statistics along with the complete boundary conditions (including the wall dynamic impedance) is provided to completely characterize the flow in a fully transpired channel.

Original languageEnglish (US)
Title of host publication41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
StatePublished - 2005
Event41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Tucson, AZ, United States
Duration: Jul 10 2005Jul 13 2005

Other

Other41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
CountryUnited States
CityTucson, AZ
Period7/10/057/13/05

ASJC Scopus subject areas

  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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