Transactions of the Korean Society of Mechanical Engineers (대한기계학회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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Analysis of Turbulent Flow in a Square Duct with a $180^{\circ}$ Bend

$180^{\circ}$곡관을 갖는 정사각 단면 덕트에서의 란류류동 해석

  • ;
  • 김명호 (고려대학교 대학원) ;
  • 문찬 (순천대학 기계공학과) ;
  • 최영돈 (고려대학교 공과대학 기계공학과)
  • Published : 1988.05.01
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Abstract

The paper describes the incorporation of an algebraic stress model(ASM) of turbulence in to a semi-elliptic solution procedure for the prediction of turbulent flow in passage around a 180.deg. square sectioned bend. The numerical results are obtained from a finite-volume discretization with applications of QUICK scheme and full find grid system without PSL approximation. Results show that the better agreements in velocity profiles with experimental data than those from k, $\varepsilon$ equation model with wall function and PSL are obtained. Predictions of Reynolds stresses also show good agreements with the experimental data.

본 연구에서는 미세격자구역에서 속도에 관한 모든 운송방정식(transport equation)과 압력방정식을 푸는 완전미세격자법을 채택하였고 거친 격자구역에서는 K, $\varepsilon$ 방정식모델과 Boussinesq의 난류모델로 과점성계수를 구하는 방법 대신 레이놀 즈응력을 대수식으로 직접 구하는 대수응력모델(algebraic stress model, ASM)을 사용하여 해석하였다.

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