전향각이 큰 선형터빈 익렬을 통하는 난류유동의 수치해석

DOI QR코드

DOI QR Code

이훈구;유정열;윤준원
Lee, Hun-Gu;Yu, Jeong-Yeol;Yun, Jun-Won

  • 발행 : 1996.12.01

초록

A numerical analysis on three dimensional turbulent incompressible flows through linear cascades of turbine rotor blades with high turning angles has been performed by using a generalized k-.epsilon. model which is a high Reynolds number form and derived by RNG(renormalized group) method to account for the variation of the rate of strain. A second order upwind scheme is used to suppress numerical diffusion in approximating the convective terms. Body-fitted coordinates are adopted to represent the complex blade geometry accurately. For the case without tip clearance, velocity vectors and static pressure contours are shown to be in good agreement with previous experimental results. For the case with tip clearance, the effects of the passage vortex and tip clearance flow on the total pressure loss as well as their interactions are discussed.

키워드

선형터빈익렬;RNG방법;익단간극;2차유동