압력보정법을 이용한 8개의 원심압축기 임펠러 CFD의 적용 연구

다국어 초록 (Multilingual Abstract)

Two representative finite volume methods, i.e., the time marching method and the pressure correction method, were applied to 8 centrifugal compressor impeller flows, with low to very high level of pressure ratio, among which 7 impellers' experimental performance is given in the open literature. The present study is focused on the prediction differences from both methods, developed by the authors, in the pressure correction method's point of view. In all cases, the time marching method gives a satifactory solution, but the pressure correction method does not. Up to about 18% less level of total-to-total pressure ratio is predicted by the pressure correction method as the level of the impeller pressure ratio increases up to about 10. The drop of total pressure ratio is caused by the underestimation of static pressure rise which seems to be attributed to inappropriate linearization and discretization of the pressure/density coupling terms in the pressure correction equation.

목차 (Table of Contents)

• ABSTRACT
  
• 1. 서론
  
• 2. 수치해석 방법
  
• 3. 원심압축기 임펠러
  
• 4. 결과 및 고찰
  
• 5. 결론
  
• 참고문헌