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수치 유동 해석을 이용한 터보펌프용 인듀서의 성능 향상에 대한 연구
이경훈(Kyoung-Hoon Lee),김경호(Kyung-Ho Kim),김영수(Young-Soo Kim),우유철(Yoo-Cheol Woo) 한국유체기계학회 2001 유체기계 연구개발 발표회 논문집 Vol.- No.-
Hydraulic performance of LCH4 fuel inducer in turbopump system was predicted by 3-D Navier-stokes calculation. The inducer was designed initially using 1-D method. Different parameters with blade angle and flow coefficient were set from the initial design one, and computation was fulfilled to assess the redesigned models. Especially, influence of inlet back flow on inducer performance and its effective control were explored. The numerical results showed that through reducing inlet back flow strength., the hydraulic efficiency of inducer could be improved up to about 20% compared to that of the initial design one.
최창호(Chang-Ho Choi),김진한(Jin-Han Kim),양수석(Soo-Seok Yang),이대성(Dae-Sung Lee),우유철(Yoo-Cheol Woo) 한국유체기계학회 2000 유체기계 연구개발 발표회 논문집 Vol.- No.-
A turbopump system composed of two pumps and one turbine is considered. The turbine composed of a nozzle and a rotor is used to drive the pumps while gas passes through the nozzle, potential energy is converted to kinematic energy, which forces the rotor blades to spin. In this study, an aerodynamic design of turbine system is investigated using compressible fluid dynamic theories with some pre-determined design requirements (i.e., pressure ratio, rotational speed, required power etc.) obtained from liquid rocket engine (L.R.E.) system design. For simplicity of turbine system, impulse-type rotor blades for open type L.R.E. have been chosen. Usually, the open-type turbine system requires low mass flow rate compared to close-type system. In this study, a partial admission nozzle is adopted to maximize the efficiency of the open-type turbine system. A design methodology of turbine system has been introduced. Especially, partial admission nozzle has been designed by means of simple empirical correlations between efficiency and configuration of the nozzle. Finally, a turbine system design for a 10 ton thrust level of L.R.E is presented.