임펠러 입출구각에 따른 양흡입 원심송풍기 성능특성

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 25; no. 2; pp. 191 - 199
• Main Authors: 이종성(Jong Sung Lee), 장춘만(Choon Man Jang)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2014
• Subjects: 기계공학; 반응면 기법; 수치해석; Efficiency; 양흡입 원심송풍기; Numerical simulation; 효율; Response surface method; Double-inlet centrifugal blower; 최적 설계; Design optimization
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2014.25.2.191

Effects of design variables on the performance of a double-inlet centrifugal blower have been analyzed based on the three-dimensional flow analysis. Two design variables, blade inlet and outlet angles, are introduced to enhance a blower performance. General analysis code, ANSYS-CFX13, is employed to analyze internal flow and a blower performance. SST turbulence model is employed to estimate the eddy viscosity. Throughout the shape optimization of an impeller at the design flow condition, the blower efficiency and pressure are successfully increased by 4.7 and 1.02 percent compared to reference one. It is noted that separated flow observed near cut-off region can be reduced by optimal design of blade angles, which results in stable flow pattern in the blade passage and increase of a blower performance. The stable flow at the impeller also makes good effects at the outlet of a volute casing.