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CFX 와 HEEDS 를 이용한 사류펌프 임펠러-디퓨저 최적화방법
이용갑(Yong Kab Lee),박인형(In Hyung Park),신재혁(Jae Hyok Shin),김성(Sung Kim),이경용(Kyoung Yong Lee),최영석(Young Seok Choi) 대한기계학회 2015 大韓機械學會論文集B Vol.39 No.10
논문에서는 사류펌프의 성능을 향상시키는 최적화 방법을 개발하였다. 본 연구에서 개발한 최적화 방법은 유동해석코드인 CFX 와 최적화 소프트웨어인 HEEDS 를 연계하는 프로세스로 이루어진다. CFX 는 유체기계해석 분야에서는 잘 알려진 소프트웨어로 해석결과의 신뢰성은 이미 검증되었으나, 새롭게 소개되고 있는 HEEDS 는 주로 구조해석 분야에서 최적화를 수행한 사례가 보고되어 있다. 이에 본 논문을 통해 유체기계에 적용하여 최적화 결과를 검토하였다. HEEDS 에는 SHERPA 라는 최적화 기법이 탑재되어 있으며, 다수의 설계변수를 설정할 수 있어 변수간의 교호작용 등을 효율적으로 검토할 수 있다. 본 논문에서는 DOE 방법으로 최적화가 이루어진 사류펌프 임펠러에 대해 개발된 방법을 적용하여 최적화 결과의 타당성과 안정성을 검토하였으며, 같은 방법을 디퓨저에 적용하여 최적화 형상을 검토하였다. 본 논문에서 개발된 최적화 방법을 이용하여 사류펌프 최적화를 수행한 결과, DOE 방법을 이용한 설계보다 개선된 결과를 적절한 시간 내에 얻을 수 있음을 확인하였다. An optimization process was developed to improve mixed-flow pump performance. The optimization process was combined with CFX (a computational fluid dynamics (CFD) code) and HEEDS (an optimization code) . CFX is a widely used CFD software for turbo machinery, whereas HEEDS, which uses the SHERPA algorithm, is a newly introduced optimization code. HEEDS can use a large number of optimization variables; thus, it is possible to effectively consider interaction effects. In this paper, an impeller model, which is already optimized with design of experiments (DOE), is used as the base model. The optimization process developed in this paper shows an improved design within an acceptable timeframe.
최영석(Young-Seok Choi),이용갑(Yong-Kab Lee),홍순삼(Soon-Sam Hong),강신형(Shin-Hyung Kang) 한국유체기계학회 2000 유체기계 연구개발 발표회 논문집 Vol.- No.-
A commercial CFD code is used to compute the 3-D viscous flow field within the impeller of a centrifugal pump. Several preliminary numerical calculations are carried out to determine the influence of the parameters such as the grid systems, the numerical schemes, the turbulence models and the shape of the vaneless diffusers at the design flow rate. The results of the preliminary study are used for the calculation of the off-design flow conditions. The circumferentially averaged results such as the radial and tangential velocities, the exit flow angle, the slip factor, the static pressure and the total pressure are compared with the experimental data at the impeller exit to discuss the influence of the prescribed parameters.
최영석,이용갑,홍순삼,강신형,Choi, Young-Seok,Lee, Yong-Kab,Hong, Soon-Sam,Kang, Shin-Hyung 한국유체기계학회 2001 한국유체기계학회 논문집 Vol.4 No.1
A commercial CFD code is used to compute the 3-D viscous flow field within the impeller of a centrifugal pump. Several preliminary numerical calculations are carried out to determine the influence of the parameters such as the grid systems, the numerical schemes, the turbulence models and the shape of the vaneless diffusers at the design flow rate. The results of the preliminary study are used for the calculation of the off-design flow conditions. The circumferentially averaged results such as the radial and tangential velocities, the exit flow angle, the slip factor, the static pressure and the total pressure are compared with the experimental data at the impeller exit to discuss the influence of the prescribed parameters.
주종일,최영석,이용갑,김탁현,김상용,Ju, Jong-Il,Choi, Young-Seok,Lee, Yong-Kab,Kim, Tak-Hyun,Kim, sangyong 한국유체기계학회 2003 한국유체기계학회 논문집 Vol.6 No.2
Numerical studies have been conducted to predict the solid-liquid separation efficiency of turbulent flow in a hydrocyclone using a commercial CFD code. To validate the CFD code, several preliminary numerical calculations are carried out to determine the influence of parameters such as grid systems, numerical schemes, and turbulence models. The numerical studies have been performed on the hydrocyclones with the different vortex finder geometries by changing the mass flow rate, and the results were compared with the experimental data. The results show that the CFD code can be used as a design tool to improve the performance of hydrocyclones.
주종일(Jong-Il Ju),최영석(Young-Seok Choi),이용갑(Yong-Kab Lee),김탁현(Tak-Hyun Kim),김상용(sangyong Kim) 한국유체기계학회 2002 유체기계 연구개발 발표회 논문집 Vol.- No.-
Numerical studies have been conducted on the turbulent flow in a hydrocyclone to predict the solid-liquid separation efficiency using commercial CFD code. To validate the CFD code, several preliminary numerical calculations are carried out to determine the influence of the parameters such as the grid systems, the numerical schemes and the turbulence models. The numerical studies have been performed on the hydrocyclones with the different vortex finder geometries by changing the mass flow rate and the results were compared with the experimental data. The results show that the CFD code can be used as a helpful tools to improve the performance of hydrocyclones.