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가이드 베인을 부착한 핀-휜 유동에서 가이드 베인 위치와 입사각에 따른 전열 및 유동 특성에 관한 수치적 연구
이득호(Deukho Lee),오영택(Yeongtaek Oh),배지환(Jihwan Bae),이창형(Changhyeong Lee),김귀순(Kuisoon Kim) 한국추진공학회 2019 한국추진공학회지 Vol.23 No.3
In this study, a guide vane with varying positions and incidence angles was adopted to a pin-fin channel to analyze the change in thermal performance and pressure loss characteristics. A numerical analysis was conducted to investigate the effect of incidence angles and positions on heat transfer and flow characteristics at Re =1400. The results of it were compared those of a pin-fin channel without a guide vane. In case 1 when the incidence angle is 0˚ , the heat transfer performance is maximized and improved by approximately 5% when compared to the pin-fin channel without the guide vane. In case 2 when the incidence angle is 10˚ , the pressure loss is minimized and decreased by approximately 1.9% when compared to the pin-fin channel without the guide vane.
후퇴익형 형상의 와류발생기가 있는 핀휜 유동의 전열 및 유동 특성 분석에 관한 수치적 연구
이창형(Changhyeong Lee),오영택(Yeongtaek Oh),배지환(Jihwan Bae),이득호(Deukho Lee),김귀순(Kuisoon Kim) 한국추진공학회 2018 한국추진공학회 학술대회논문집 Vol.2018 No.12
본 논문에서는 터빈 냉각에 흔히 사용되는 핀-휜 유동에 관한 연구를 진행하였다. 본 연구에서 핀-휜 배열 전방에 후퇴익형 와류발생기를 가지며 익형 단면 형상은 NACA-9410을 사용하였다. 와류발생기 위치를 유동에 수직인 방향으로 변화시키며 성능을 기존의 핀-휜 유동과 비교하였다. 레이놀즈수 영역은 6000 ~ 15000에서 계산하여 비교하였으며 전산 해석을 위해 상용프로그램인 ANSYS v18.0 CFX, 난류 모델은 k-ω SST를 사용하였다. In this paper, we have studied pin-fin arrays which have widely being used method to enhance turbine blade heat transfer. In this study, vortex generator was used in front of the pin-fin arrangement, and the cross-sectional shape of the airfoil was NACA-9410. We calculated Reynolds number from 6000 to 15000 and used turbulence model k-ω SST for computational analysis. Pin-fin arrays was analyzed using the commercial program ANSYS v18.0 CFX.
후퇴익형 형상의 와류발생기가 있는 핀휜 유동의 전열 및 유동 특성 분석에 관한 수치적 연구
이창형(Changhyeong Lee),오영택(Yeongtaek Oh),배지환(Jihwan Bae),이득호(Deukho Lee),김귀순(Kuisoon Kim) 한국추진공학회 2019 한국추진공학회지 Vol.23 No.4
In this study, pin-fin arrays, which are widely used for cooling turbine blades, were studied. The vortex generator in pin-fin arrays is located in front of the circular tube. The cross-section of the vortex generator is NACA-9410. The purpose of this study is to analyze heat transfer performance and flow characteristics of pin-fin arrays. The position of vortex generator is changed with the vertical flow direction on the bottom wall. Pin-fin arrays were calculated with 6000, 10000 and 15000 Reynolds number. The commercial program ANSYS v18.0 CFX and the turbulence model k-ω SST were used. As a result, the heat transfer performance increased up to 5.8% and pressure loss increased less than 1%.