• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집E
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• pp.637-642
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• 2001

Performance and cavitation characteristics of a turbo pump inducer which is designed for oxygen pump is experimentally investigated. It is found that the static performance of inducer is dependent on the location of inlet pressure measurement and that enough distance from inducer is ensured for accurate evaluation of performance. With the increase of flow rate. NPSH tends to decrease as opposed to pump characteristics, which seems to be due to the cavitation region.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2003년도 유체기계 연구개발 발표회 논문집
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• pp.353-360
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• 2003

Hydraulic performance and cavitation characteristics of fuel pump in turbo-pump were studied experimentally. The fuel pump has a centrifugal impeller with a separate inducer. In this paper, flow characteristics of inducer and impeller was experimentally investigated separately and together. Especially static pressure distribution of Inducer was examined in non-cavitation and cavitation conditions.

• 한국유체기계학회 논문집
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• 제15권1호
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• pp.41-45
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• 2012

The effects of inducer tip clearance on the suction performance of a pump for turbopumps are investigated. Experiments for the pump with inducer tip clearances of 1.8% and 1.4% of blade height were performed. The experimental results showed that the suction performance of the pump increased as the tip clearance decreased. It seems that the suction performance of the pump becomes better with smaller tip clearances because the strength of the inducer backflow becomes weak with the decreased tip clearance.

• 한국유체기계학회 논문집
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• 제6권1호
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• pp.6-13
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• 2003

Variations of performance and NPSH of a turbo pump inducer were measured. The flows at the inlet and the outlet of the inducer were also experimentally investigated by measuring flow velocity and angle using a 3-hole Pilot tube. Performance and velocity profiles show a similarity for tested speeds, however not for efficiencies. Strong recirculating flows appears at the inlet of inducer even at the design condition. Cavitating flows were also visualized at several NPSH's.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2002년도 유체기계 연구개발 발표회 논문집
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• pp.408-416
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• 2002

Hydraulic performance of the pump with an inducer was predicted by 3-D Navier-stokes calculation. The evaluated pump was the single-stage centrifugal pump with a separated inducer to pressurize fuel (LCH4) in Turbo-pump system with a specific speed (Ns) of approximately 0.3[rad/s, m3/s, J/kg] and a suction specific speed(s) of 15[rad/s, m3/s, J/kg]. That conventional pump was designed with the combination of 1-D theory and empirical correlation. In this study, preliminary design to select key parameters such as inlet flow coefficient was reviewed by investigating sets of the known design methods to achieve appropriate suction performance, and the performance of newly designed inducer and impeller was compared with the old one, using CFD method. The numerical results showed that the hydraulic efficiency of the new pump was predicted $5.5\%$ higher than that of the conventional one, through design parameter re-selection, configuration improvement and blade loading control

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2001년도 유체기계 연구개발 발표회 논문집
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• pp.258-263
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• 2001

A fuel pump for a turbopump system has been designed under an international co-work program. The liquid methane fuel pump has an inducer, in front of centrifugal impeller blades, to improve cavitation performance. The three dimensional viscous flow in the fuel pump was investigated through numerical computation. An arrangement of the inducer and impeller has yielded a strong interaction between inducer and impeller blades. The performance of the pump was evaluated from the calculated results. A parametric study was performed for various design variables, and it could oner a database for design parameters to design a fuel pump. A modified design of a fuel pump was proposed by KIMM to improve pump performance.

• Journal of Mechanical Science and Technology
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• 제16권11호
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• pp.1497-1510
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• 2002

The onset of cavitation causes head and efficiency of a main pump to be reduced significantly and generates vibration and noise. In order to avoid these phenomena, the inlet of the pump is fitted with a special rotor called an inducer, which can operate satisfactorily with extensive cavitation. The motivation of this study is to find out cavitation modes from the inducer inlet pressure signals and event characteristics from outlet ones at various operating conditions. The cavitation modes are analyzed by using a cross-spectral density of fluctuating pressures at the inducer inlet. The time-frequency characteristics of wall pressures downstream of the inducer are presented in terms of event frequency, its duration time, and number of events by using the Choi-Williams distribution.

• 한국유체기계학회 논문집
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• 제11권5호
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• pp.37-43
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• 2008

An inducer is employed in a modern rocket feed system because it allows a turbopump system to operate at a high speed with low inlet pressures so as to minimize the weight and the size of the system. Cavitation performance can be improved by installing an inducer to the pump, enabling to increase the operational speed of the pump. The main purpose of an inducer is to increase the static pressure prior to an impeller to enable the impeller to operate satisfactorily under cavitation environments. In the present study the effects of axial distance between the inducer and the impeller on the performance of the pump were studied using both experimental and computational methods. Two inducers with different axial length were used for the experiments and the pump performances were measured. The experimental results show that the suction performance decreases as the axial gap between the inducer and impeller is increased.

• 한국추진공학회지
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• 제10권1호
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• pp.18-22
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• 2006

액체로켓엔진용 터보펌프에서 연료펌프에 대한 수력시험을 수행하였다. 작동유체는 상온의 물이며 펌프는 모터로 구동된다. 인듀서가 펌프의 양정 및 효율에 미치는 영향은 작지만 펌프의 캐비테이션 성능에는 지대한 영향을 미치는 것을 실험으로 확인하였다. 또한 인듀서 단독의 성능을 살펴보기 위한 시험을 수행하였는데, 캐비테이션 시험 중 인듀서에서 55% 양정저하가 발생할 때 펌프에서 캐비테이션 임계점에 도달하는 것을 알 수 있었다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2005년도 제24회 춘계학술대회논문집
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• pp.243-247
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• 2005

액체로켓엔진용 터보펌프에서 연료펌프에 대한 수력시험을 수행하였다. 작동유체는 상온의 물이며 펌프는 모터로 구동되고 상온의 물을 작동유체로 이용하였다. 인듀서가 펌프의 양정 및 효율에 미치는 영향은 작지만 펌프의 캐비테이션 성능에는 지대한 영향을 미치는 것을 실험으로 확인하였다. 또한 인듀서 단독의 성능을 살펴보기 위한 시험을 수행하였는데, 캐비테이션 시험 중 인듀서에서 $55\%$ 양정저하가 발생할 때 펌프에서 캐비테이션 임계점에 도달하는 것을 알 수 있었다.