축대칭 실린더 형상에 대한 부분공동 유동의 이해 및 다상유동 해석 프로그램의 검증 = Understanding of Partial Cavitation Flow over Axisymmetric Cylinders and Verification of Multi-phase Flow Analysis Program

다국어 초록 (Multilingual Abstract)

A two-phase solver has been developed and is applied to model the cavitation flow. The governing equation system is the two-phase Reynolds Averaged Navier-Stokes(RANS) Equation in a homogeneous form in which both liquid and vapor phases are treated as incompressible fluids. It employs an implicit, dual time, preconditioned algorithm using finite difference scheme in curvilineal coordinates. In order to close the model, a low Reynolds number k-ε turbulence model is introduced. A standard k-ε turbulence model is also used for the purpose of comparison. Other closure models incorporated relate to the mass transfer rates between liquid and vapor phases. The experimental cavitating flows around a hemispherical fore-body, an ogive fore-body and a caliber-0 fore-body cylinders are employed to test the solver.

목차 (Table of Contents)

• 1. 서론 = 1
• 2. 지배방정식 및 수치해석 방법 = 3
• 2.1 이론적 배경 = 3
• 2.2 물리적 영역에서 지배 방정식 및 수치해석 방법 = 5
• 2.3 계산 영역에서의 지배 방정식 = 13
• 2.4 전산 해석 방법 = 17
• 2.5 수치적 유한차분화 = 19
• 2.6 캐비테이션 모델 = 29
• 2.7 난류 모델 = 30
• 3. 격자계, 초기 및 경계조건 = 36
• 3.1 격자계 = 36
• 3.2 초기조건 및 경계조건 = 36
• 3.2.1 작동조건 = 36
• 3.2.2 초기조건 및 경계조건 = 37
• 4. 결과 = 39
• 4.1 축대칭 형상에 대한 부분공동 해석 = 40
• 5. 결론 = 56
• 참고문헌 = 57
• Abstract = 60