초공동 고속 캐비테이션 터널 구동펌프 개발
Development of the Driving Pump for the Super-cavitation & High-speed Cavitation Tunnel
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초록
In order to develop the driving pump for High-speed Cavitation Tunnel(HCT) which can experiment the super-cavitating submerged body, KRISO decided on the pump specification, designed the mixed-flow pump on the basis of the existing pump data and predicted the performance of the design pump using commercial CFD code (CFX-10). After the manufacture and installation of the driving pump, KRISO conducted the trial-test for HCT, analyzed the pump performance and compared trial-test results to those of design stage. The trial-test items for the HCT driving pump are measurements of output current/voltage at the inverter of the driving pump and the flow velocity in the HCT test section. The trial-test results showed the decrease in the flow rate of about 4.6% and the increase in pump head of about 8%, compared with those of the pump prediction. After the trial-test, the performance of the driving pump is predicted using CFX-10 with measured flowrates and pump rotational velocities. Though there is some difference between trial-test and prediction results due to inadequate motor data, it is thought that the tendency is reasonable. It is found that CFX-10 is useful to predict a mixed-flow pump.
Abstract
In order to develop the driving pump for High-speed Cavitation Tunnel(HCT) which can experiment the super-cavitating submerged body, KRISO decided on the pump specification, designed the mixed-flow pump on the basis of the existing pump data and predicted the performance of the design pump using commercial CFD code (CFX-10). After the manufacture and installation of the driving pump, KRISO conducted the trial-test for HCT, analyzed the pump performance and compared trial-test results to those of design stage. The trial-test items for the HCT driving pump are measurements of output current/voltage at the inverter of the driving pump and the flow velocity in the HCT test section. The trial-test results showed the decrease in the flow rate of about 4.6% and the increase in pump head of about 8%, compared with those of the pump prediction. After the trial-test, the performance of the driving pump is predicted using CFX-10 with measured flowrates and pump rotational velocities. Though there is some difference between trial-test and prediction results due to inadequate motor data, it is thought that the tendency is reasonable. It is found that CFX-10 is useful to predict a mixed-flow pump.
참고문헌 (8)
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- 안종우, "Waterjet 추진장치의 중량감소 펌프 개발", 대한조선학회 논문집, 47(1), pp.30~37 (2010), 대한조선학회
- 안종우, "대형캐비테이션터널(LCT) 실물 구동펌프 성능시운전", 대한조선학회 논문집, 52(6), pp.428~434 (2015), 대한조선학회
- Escobar, E., "Planing avoidance control for supercavitating vehicles", American Control Conference (2014)
- Ha, J.H., "Fluid machinery", pp.65~ (1996), Bo Moon Dang
- Kawakami, E., "Investigation of the behavior of ventilated supercavities", Journal of Fluids Engineering, 133(9), pp.091305~ (2011)[DOI]
- 백부근, "Design of a bubble collecting section in a high speed water tunnel for ventilated supercavitation experiments", Journal of Mechanical Science and Technology, 31(9), pp.4227~4235 (2017), 대한기계학회
- 백부근, "환기 초공동 실험을 위한 캐비테이션 터널기포 포집부 연구", 대한조선학회 논문집, 53(4), pp.300~315 (2016), 대한조선학회