대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제27권8호
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  • Pages.1150-1157
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  • 2003
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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난류에 의해 야기되는 이차유동 예측성능에 대한 비선형 κ-ε 난류모델의 평가

Evaluation of Nonlinear κ-ε Models on Prediction Performance of Turbulence-Driven Secondary Flows

  • 명현국 (국민대학교 기계자동차공학부)
  • 발행 : 2003.08.01
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초록

Nonlinear relationship between Reynolds stresses and the rate of strain of nonlinear k-$\varepsilon$models is evaluated theoretically by using the boundary layer assumptions against the turbulence-driven secondary flows in noncircular ducts and then their prediction performance is validated numerically through the application to the fully developed turbulent flow in a square duct. Typical predicted quantities such as mean axial and secondary velocities, turbulent kinetic energy and Reynolds stresses are compared with available experimental data. The nonlinear k-$\varepsilon$ model adopted in a commercial code is found to be unable to predict accurately duct flows with the prediction level of secondary flows one order less than that of the experiment.

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참고문헌

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