프로펠러 후류의 총와도 수식모델 연구
Study on the Resultant Vorticity Numerical Model of the Propeller Wake
1
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
This study numerically carried out the propeller open water test(POW) by solving Navier-Stokes equations governing the three-dimensional unsteady incompressible viscous flow with the turbulence closure model of the κ- ω SST model. Numerical simulations are performed at various range of advance ratios. Corresponding to Reynolds numbers of 5.89x105 ~ 6.47x105 based on free stream velocity and the chord length at 0.7 propeller radius. The present results give a good agreement with those of the experiment. The propeller induced vortical structures have been analyzed by visualizing the resultant vorticity. As the advance ratio increases, the magnitude and length of the resultant vorticity decrease significantly. As the main focus of present study, the numerical model to present the ( r - θ) plane-averaged resultant vorticity along the streamwise direction for various advance ratios has been suggested.
Abstract
This study numerically carried out the propeller open water test(POW) by solving Navier-Stokes equations governing the three-dimensional unsteady incompressible viscous flow with the turbulence closure model of the κ- ω SST model. Numerical simulations are performed at various range of advance ratios. Corresponding to Reynolds numbers of 5.89x105 ~ 6.47x105 based on free stream velocity and the chord length at 0.7 propeller radius. The present results give a good agreement with those of the experiment. The propeller induced vortical structures have been analyzed by visualizing the resultant vorticity. As the advance ratio increases, the magnitude and length of the resultant vorticity decrease significantly. As the main focus of present study, the numerical model to present the ( r - θ) plane-averaged resultant vorticity along the streamwise direction for various advance ratios has been suggested.
참고문헌 (10)
- 김덕수, "점성유동 수치해석법에 의한 선박용 추진기 단독성능 해석", 대한조선학회 논문집, 39(3), pp.2~17 (2002), 대한조선학회
- Park, J.J, "A Study on the characteristics of viscous flows around Hull by Propeller effect", Proceedings of the Annual Autumn Metting, pp.583~588 (2004), SNAK
- Park, J.J, "A Viscous flows around Pre-swirl Stator using Moving grid method", Proceedings of the Annual Metting, pp.488~493 (2006), SNAK
- Hsin, C.Y., "Development and analysis of panel method for propellers in unsteady flow", 박사, pp.1990
- Kim, H.G, "Prediction of Steady Performance of a Propeller by Using a Potential-Based Panel Method", Journal of the Society of Naval Architects of Korea, 30(1), pp.73~86 (1993)
- Local Velocity Field Measurements around the KCS Model in the SRI 400m Towing Tank, "Fujisawa, J", ~, pp.Ship Performance Division Report No 00-003-02 (2000)
- 이정묵, "Phase-Averaged PTV Measurements of Propeller Wake", U.S. National Academy Press, pp.18~25 (2002)
- 백부근, "PIV 기법을 이용한 프로펠러 후류의 3차원 유동 특성 연구", 대한조선학회 논문집, 44(3), pp.219~227 (2007), 대한조선학회
- Batchelor, G. K, "An introduction to fluid" (1967), Cambridge university press
- "Fluent 6.3.26 User Guide", ~