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

The Korean Society of Mechanical Engineers (대한기계학회)
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Unsteady cascade flow calculations of using dual time stepping and the k-$\omega$ turbulence model

이중시간전진법과 k-$\omega$ 난류모델을 이용한 익렬 내부 비정상 유동해석

  • 최창호 (서울대학교 대학원 기계공학과) ;
  • 유정열 (서울대학교기계공학과)
  • Published : 1997.12.01
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Abstract

A numerical study on two-dimensional unsteady transonic cascade flow has been performed by adopting dual time stepping and the k-.omega. turbulence model. An explicit 4 stage Runge-Kutta scheme for the compressible Navier-Stokes equations and an implicit Gauss-Seidel iteration scheme for the k-.omega. turbulence model are proposed for fictitious time stepping. This mixed time stepping scheme ensures the stability of numerical computation and exhibits a good convergence property with less computation time. Typical steady-state convergence accelerating schemes such as local time stepping, residual smoothing and multigrid combined with dual time stepping shows good convergence properties. Numerical results are presented for unsteady laminar flow past a cylinder and turbulent shock buffeting problem for bicircular arc cascade flow is discussed.

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References

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