热科学学报（英文版）2008，Vol.17Issue(4)：314-323,10.
Investigation of a Centrifugal Compressor and Study of the Area Ratio and TIP Clearance Effects on Performance
Investigation of a Centrifugal Compressor and Study of the Area Ratio and TIP Clearance Effects on Performance
Mahdi Nili-Ahmadabadi 1Ali Hajilouy-Benisi 1Mohammad Durali 1Farhad Ghadak2
作者信息
- 1. School of Mechanical Engineering, Center of Excellence in Energy Conversion, Sharif University of Technology, POBox: 11365-8639, Tehran, Iran
- 2. Aerospace Engineering Department, Emam Hossein University
- 折叠
摘要
Abstract
In this research, the centrifugal compressor of a turbocharger is investigated experimentally and numerically. Performance characteristics of the compressor were obtained experimentally by measurements of rotor speed and flow parameters at the inlet and outlet of the compressor. Three dimensional flow field in the impeller and dif-fuser was analyzed numerically using a full Navier-Stokes program with SST turbulence model. The performance characteristics of the compressor were obtained numerically, which were then compared with the experimental results. The comparison shows good agreement.Furthermore, the effect of area ratio and tip clearance on the performance parameters and flow field was stud-ied numerically. The impeller area ratio was changed by cutting the impeller exit axial width from an initial value of 4.1 mm to a final value of 5.1 mm, resulting in an area ratio from 0.792 to 0.965. For the rotor with exit axial width of 4.6 nun, performance was investigated for tip clearance of 0.0, 0.5 and 1.0 mm. Results of this simula-tion at design point showed that the compressor pressure ratio peaked at an area ratio of 0.792 while the effi-ciency peaked at a higher value of area ratio of 0.878. Also the increment of the tip clearance from 0 to 1 mm re-sulted in 20 percent efficiency decrease.关键词
centrifugal compressor/area ratio/tip clearance effectKey words
centrifugal compressor/area ratio/tip clearance effect分类
数理科学引用本文复制引用
Mahdi Nili-Ahmadabadi,Ali Hajilouy-Benisi,Mohammad Durali,Farhad Ghadak..Investigation of a Centrifugal Compressor and Study of the Area Ratio and TIP Clearance Effects on Performance[J].热科学学报（英文版）,2008,17(4):314-323,10.
