큰 에디 모사 기법을 이용한 원심펌프 내부 유동해석

다국어 초록 (Multilingual Abstract)

In a centrifugal pump, due to its complicated geometry and flow phenomena, an accurate prediction of flow features is a challenging task. In the present study, large eddy simulation is performed to investigate the flow in a centrifugal pump including the impeller and the volute. A dynamic global model (Lee et al., 2010) is used for a subgrid-scale model, and an immersed boundary method is adopted in a non-inertial reference frame (Kim & Choi, 2006) to impose the no-slip boundary condition on stationary and rotating surfaces. The pump performances computed are in good agreements with those by experiments. The instantaneous flow fields indicate that recirculation zones are generated on the pressure and suction surfaces of impeller blades and near the volute tongue. Also, notable amounts of backflow and leakage flow are observed near the impeller outlet and the volute casing.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 수치해석 기법
• 3. 결과 및 토의
• 4. 결론
• 참고문헌