The studies of optimum wavelength choice in distributed roughness laminar flow control technique

Yueli Li, Dong Li, Yong Yang

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

Abstract

The key technique of swept wing distributed roughness laminar flow control technique is how to confirm the cross-flow disturbance wavelength used to control transition. The optimum control wavelength of infinite swept wing is studied with the point of physical mechanism of control wave and flow interaction. The method to determine the wavelength is discussed in this paper. By using this method, 8mm is the optimum control wavelength under Saric's experimental condition which consists with Saric's experimental result. By using adaptive search method 1.72mm is obtained as the optimum control wavelength under NWPU model testing condition. By using silk-screen technique roughness array with roughness elements spacing of 1.7mm is added at leadingedge x/c=4%, and transition location is delayed to trailing-edge.

Original languageEnglish
Title of host publication27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
Pages1271-1277
Number of pages7
StatePublished - 2010
Event27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010 - Nice, France
Duration: 19 Sep 201024 Sep 2010

Publication series

Name27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
Volume2

Conference

Conference27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
Country/TerritoryFrance
CityNice
Period19/09/1024/09/10

Keywords

  • Optimum control wavelength
  • Silk-screen
  • Swept wing
  • There-dimension Orr-Sommerfeld equation
  • Transition delay

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