서지주요정보
익단 틈새를 포함한 3차원 터보기계 이상유동장의 수치적 연구 = Numerical investigation of three-dimensional two-phase flow field in turbomachinery including tip clearance
서명 / 저자 익단 틈새를 포함한 3차원 터보기계 이상유동장의 수치적 연구 = Numerical investigation of three-dimensional two-phase flow field in turbomachinery including tip clearance / 윤주식.
저자명 윤주식 ; Yoon, Ju-Sig
발행사항 [대전 : 한국과학기술원, 2002].
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소장정보

등록번호

8013653

소장위치/청구기호

학술문화관(문화관) 보존서고

DAE 02007

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초록정보

The influence of gas-particle two-phase flow on the erosion of the blade and shroud of an axial compressor is numerically investigated using CFD(Computational Fluid Dynamics) method. In contrast to the quasi-three dimensional calculations used in the literature, the complete three-dimensional calculation is conducted in this paper to study erosion of blade and shroud and the tip-clearance flow. For this purpose, three-dimensional compressible turbulent flow code is developed. Code validation is conducted with respect to the various turbulent models(Baldwin-Lomax, k-ω, k-ε, and q-ω model) with the turbulent flat plate and VKI turbine cascade flow. For the present two-phase three-dimensional flow calculations with gas-particle two-way coupling, the three-dimensional Lagrangian particle tracing technique is developed. For efficiency of computation parallel processing is used. To further verify accuracy of the code in the case there are gas-particle interactions, the gas-solid particle mixture flow in the JPL nozzle is calculated using the three-dimensional grid and compared with earlier two-dimensional computational results. Particles passing through the tip-clearance in the DFVLR compressor can impact either on the blade tip or on the shroud after escaping the tip-clearance. It was found that larger particles moved more radially and caused more serious erosion on the blade and shroud.

서지기타정보

서지기타정보
청구기호 {DAE 02007
형태사항 viii, 87 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ju-Sig Yoon
지도교수의 한글표기 : 장근식
지도교수의 영문표기 : Keun-Shik Chang
학위논문 학위논문(박사) - 한국과학기술원 : 항공우주공학전공,
서지주기 참고문헌 : p. 43-45
주제 터보기계
이상유동
전산유체
부식
익단흐름
turbomachinery
two phase
CFD
erosion
tip clearance flow
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