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박편구,정은환,김진한,Park, Pyun-Goo,Jeong, Eun-Hwan,Kim, Jin-Han 한국항공우주연구원 2005 항공우주기술 Vol.4 No.2
초기 설계과정에서 4가지 1.4MW급 터보펌프용 터빈설계안을 도출한 후 각각의 설계안에 대하여 프로즌 로터기법을 적용한 3차원 유동해석을 수행하였다. 이 결과를 통하여 각각의 설계안간의 성능을 비교하고 가장 성능이 우수한 설계안을 선정하였다. 계산결과의 분석을 통하여 유로에서의 유동특성과 충격파와 후류에 의해 발생되는 손실을 파악하였으며 이 분석 결과를 바탕으로 보다 우수한 성능을 보일 것으로 예측되는 설계안을 도출한 후 이에 대한 3차원 유동해석을 수행하여 결과를 분석하였다. Through a preliminary design process, four design candidates for a 1.4MW class partial admission turbine have been chosen and the numerical analyses using a frozen rotor method are applied to estimate their performance. Each flow analysis result was compared with others and the optimum design was selected. Flow characteristics in the passages and some types of losses induced by shocks and wakes were found from calculation results. A new rotor blade was redesigned based on these calculations and this result is compared with previous one through flow analysis.
박편구(Pyun-Goo Park),정은환(Eun-Hwan Jeong),김진한(Jinhan Kim) 한국항공우주연구원 2008 항공우주기술 Vol.7 No.2
1차원 설계에서 설계된 2단형 터보펌프 터빈에 대한 유동해석을 수행하고 결과를 비교 분석하였다. 1단 동익에 대한 계산결과로 부터 가장 우수한 1단 익형을 선정한 후 정익의 입ㆍ출구 높이 변화에 따른 터빈의 성능변화를 고찰하였다. 2단 전체에 대한 계산을 수행하고 같은 출력의 단단형 터빈에 비해 높은 비출력을 갖는 터빈의 설계가 가능함을 확인하였다. Numerical analyses of two-stage turbopump turbines were conducted. One of the candidates for the 1st rotor was selected based on the result of the numerical investigation. Besides, the effects of the stator height on the turbine performance were studied. Finally, the performance of the entire two-stage turbine was predicted by numerical calculation. The result showed that the two-stage turbine produces more specific power than a one-stage turbine.
박편구(Pyun-Goo Park),정은환(Eun-Hwan Jeong) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.12
7톤급 터보펌프 구동을 위한 터빈 설계를 위하여 총 21종의 터빈 설계안에 대한 유동해석을 수행하였다. 계산결과를 바탕으로 가장 우수한 성능의 터빈을 설계하고 동익의 현절비, 코드길이, 그리고 형상이 터빈에 미치는 영향을 분석하였다. 이와 더불어 제작성을 높이기 위한 동익 끝단의 형상 변화가 터빈성능을 크게 저하시키지 않음을 확인하였다. Numerical calculations for the 21 variants of turbine designs for a 7 ton class turbopump have been conducted. The turbine design showing best performance is selected among calculated the turbine designs and the effect of the solidity of a rotor, the chord length of a rotor, and the blade shape on the turbine performance have been analyzed. The results also show that the modified leading and trailing edge shape of a turbine rotor to improve manufacturing performance does not degrade the turbine performance significantly.
노즐과 로터가 장착된 초음속 충동형 터빈의 전산유동해석
박편구(Pyun Goo Park),이은석(Eun Seok Lee),정은환(Eun Hwan Jeong),김진한(Jinhan Kim) 한국유체기계학회 2004 유체기계 연구개발 발표회 논문집 Vol.- No.-
Four design candidates for a 1.4㎿ class partial admission turbine have been chosen from a preliminary design process. Their performance were estimated through the 3-D numerical analyses using a frozen rotor method. In order to select the optimum design, each flow analysis result was compared with others. Flow characteristics in the passages and some types of losses induced by shocks and wakes were found from calculation results. Based on these calculations, a new rotor blade was redesigned and compared with previous one through flow analysis.
박편구(Pyun Goo Park),정은환(Eun Hwan Jeong),김진한(Jinhan Kim) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
A turbopump turbine consists of rotational part including a rotor and stationary part including nozzles and exit guide vanes, of which shape and relative position affect turbine performance owing to supersonic flows with prevailing unsteadiness. In this study, numerical 3-D flow calculations of the turbine with the different number of exit guide vanes and different relative position of each component are conducted and the effect of flow passage variations on turbine performance is analyzed.
정경남,박편구,조현준,이상구,Chung, Kyung-Nam,Park, Pyun-Goo,Cho, Hyun-Jun,Lee, Sang-Gu 한국유체기계학회 2001 한국유체기계학회 논문집 Vol.4 No.4
Flow analysis was carried out for a double-suction centrifugal pump. Impeller-only models and a full pump model were used to simulate the velocity field and the pressure field of the pump. Heads and efficiencies were calculated with flow rates in order to obtain general performance of the pump. The calculation results were compared to the experimental data, and satisfactory results were obtained. Thus, it may be said that the CFD serves as a useful tool for pump designs.