Journal of Advanced Marine Engineering and Technology

  • 제35권6호
  • /
  • Pages.809-813
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  • 2011
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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배열회수 안내덕트 내부의 난류유동 수치시뮬레이션

Numerical Simulation of Turbulent Flows in Inlet Duct of Heat Recovery Steam Generator

  • 곽승현 (한라대학교 공과대학 컴퓨터응용설계학과)
  • 투고 : 2011.06.13
  • 심사 : 2011.09.05
  • 발행 : 2011.09.30
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초록

배열회수시스템 입구덕트의 3차원 난류유동을 수치시뮬레이션 하였다. 본 연구는 덕트의 루프각을 부분적으로 수정하여 유동의 형상효과를 해석하는 것이 목표이다. 비구조 격자를 가지고 나비에 스톡스 방정식을 유한체적법으로 풀어 유체동력학적인 현상을 규명하였다. 유적선, 속도벡터, 동압, 잔차 등으로 수렴 등을 조사하였다. 난류모형은 k-epsilon, k-omega, reynolds stress 및 RNG k-epsilon 이다. 선회 및 비선회 조건을 2개의 덕트에 적용하였고 계산결과를 활용하여 최적형상설계를 검토하였다.

Turbulent flows are numerically simulated in the three dimensional inlet duct for heat recovery steam generator. The present study is aimed to analyze the effect of a variation in turbulent flow pattern by the change of roof angle in the transition duct. The finite volume based Navier-Stokes equations with unstructured grids are solved to make clear the flow dynamic phenomena. Reviews are made on with the data of path lines, velocity vectors, dynamic pressure, residuals for numerical convergence and so on. The k-epsilon, k-omega, Reynolds stress and RNG k-epsilon are used for generation of turbulence. Two types of roof angle are applied with and without the swirl in the duct. Turbulent flow patterns could be investigated for the optimum duct design based on the computational results.

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참고문헌

  1. B. Lindgren, O. Tornblom and A. V. Johansson, "Measurements in a plane asymmetric diffuser with 8.5 opening angle, Part II, comparison with model prediction for turbulence characteristics," Royal Inst. of Technology, Sweden
  2. C. U. Buice and J. K. Eaton, "Experimental investigation of flow through an asymmetric plane diffuser", Journal of Fluids Engineering, vol. 122, pp. 433-435, 2000. https://doi.org/10.1115/1.483278
  3. S. Obi and K. Masuda, "Experimental and computational study of turbulent separating flow in an asymmetric plane diffuser," The 9th Symp. on Turbulent Shear Flows, Kyoto, Japan, pp. 305.1-305.4, 1993.
  4. C. Hah, "Particle Wake Effects on the Drag Force of an Interactive Particle," Int'l. Journal Multiphase Flow, vol. 20, pp. 117-129, 1994. https://doi.org/10.1016/0301-9322(94)90009-4
  5. M. A. Habib and J. H. Whitelaw, "The Calculation of various diffuser flows with inlet swirl and inlet distortion effects," AIAA Journal vol. 21 no. 8, pp. 1127 -1133, 1983. https://doi.org/10.2514/3.8215
  6. B. E. Lee, S. B. Kwon and C. S. Lee, "On the effect of swirl flow of gas turbine exhaust gas in an inlet duct of heat recovery steam generator", ASME vol. 124, no. 3, pp. 496-502, 2002.
  7. J. H. Ferziger and M. Peric, "Computational Methods for Fluid Dynamics," Springer, 1997.