Journal of Mechanical Science and Technology

  • 제18권4호
  • /
  • Pages.597-605
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  • 2004
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Direct Numerical Simulation of Turbulent Scalar Transport in a Channel with Wall Injection

  • Na, Yang (Center for Aerospace System Integration Technology, Department of Mechanical Engineering, Konkuk University)
  • 발행 : 2004.04.01
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초록

Turbulent temperature field in a channel subject to strong wall injection has been investigated via direct numerical simulation technique. These flows are pertinent to internal flows inside hybrid rocket motors. A simplified model problem where a regression process at the propellant surface is idealized by wall injection has been investigated to understand how the temperature field is modified. The effect of strong wall injection displaces thermal boundary layer away from the wall and this causes a sharp drop of friction temperature. Turbulent diffusivity and dissipation time scale for temperature field are found to show large variations in the streamwise direction under application of wall blowing. It is, thus, expected that more sophisticated turbulence models would be required to predict the disturbed temperature field accurately.

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참고문헌

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