원형케이싱이 극저비속도 원심펌프의 성능에 미치는 영향 = Influence of Circualr Casing on the Performance of Very Low Specific Speed Centrifugal Pump

다국어 초록 (Multilingual Abstract)

Recently, according to the trend of small size in scale and high speed in rotation of turbomachinery, very low specific speed centrifugal pump is taking a growing interest because the pump is characterized by high head and low flow rate with convenience of manufacturing and maintenance compared with conventional positive displacement pump. However, the efficiency of the very low specific speed centrifugal pump drops rapidly with the decrease of specific speed. The purpose of this study is not only to examine the influence of casing type on the performance of centrifugal pump in the range of very low specific speed but also to determine the proper casing type for the improvement of pump performance. The results show that circular casing is suitable for the centrifugal pump in the range of very low specific speed and the influence of impeller configuration on the pump performance is very small. Radial thrust in the circular and volute casings is considerably small in the range of very low specific speed.1. 서 론* 요코하마국립대학 대학원 공학연구원

참고문헌 (Reference)

1 "Study on Optimum Configuration of a Volute Pump of Very Low Specific Speed" 66 (66): 1132-1139, 2000

2 "Performance of Very Low Specific Speed Centrifugal Impeller" 25 (25): 337-345, 1997

3 "Performance of Low Specific Speed Centrifugal Pump Turbomachinery Society of Japan" 18 : 300-307, 1990

4 "Performance Improvement and Peculiar Behavior of Disk Friction and Leakage in Very Low Specific-Speed Pumps" 65 (65): 4027-4032, 1999

5 "PTV 계측법에 의한 극저비속도 원심펌프의 내부유동특성에 관한 연구" 2005

6 "A Review of Slip Factors for Centrifugal Impellers" ser. a (ser. a): -4, pp.558~572.