다공성 수직 벽이 풍속의 저감에 미치는 영향에 대한 수치 해석적 연구

국문 초록 (Abstract)

본 논문에서는 다공성을 가지는 수직형 방풍 펜스의 바람 저감 효과를 수치 해석적으로 분석하였다. 수치 해석에는 비정렬 격자계를 사용하여 비압축성 2차원 k-e 난류 모델을 사용하였고, 여러 다공률을 가지는 세 가지 높이의 펜스에 대한 유동장을 분석하였다. 본 연구에서 고려한 세 가지 높이의 펜스의 경우 다공률 약 40%일 때 펜스 높이의 1/2지점을 따라 흐르는 주유동 방향의 속도는 다공률의 임계값에서 입구 속도보다 약 6배 정도 작다는 것을 확인하였다. 또한, 속도가 감소되는 영역은 펜스 높이의 20배 정도로 나타났다.

다국어 초록 (Multilingual Abstract)

In this study, the effect of a vertical porous fence on wind speed reduction was numerically investigated. The numerical simulations were conducted based on the two-dimensional equation of turbulent flow. Unstructured grid was employed to solve the flow field using the k-e model for three fence heights of several porosities. It was found that the streamwise wind speed behind along the half height of the fence is about six times smaller than that of inlet velocity at the critical value of porosity. which is around 40 for the three heights considered. The reduction in wind speed was found to be approximately twenty times that in the fence height.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 수치 해석 방법
• 3. 수치 해석 결과 및 분석
• 4. 결론 및 고찰
• 참고문헌(References)

참고문헌 (Reference)

• 1 정운용, "전산유동장해석을 이용한 다공성 방풍벽의 방풍성능 평가" 대한토목학회 23 (23): 831-839, 2003
• 2 유기표, "과수농가의 풍속감소를 위한 방풍팬스의 효과" 대한건축학회 25 (25): 99-106, 2009
• 3 Jeon, J. -G., "Wind Tunnel Experiment about Effect of Protection against Wind according to the Variation Porosity of Vertical Wind Fence" 25 (25): 79-82, 2005
• 4 Raine, J. K., "Wind Protection by Model Fence in a Simulated Atmospheric Boundary Layer" 2 (2): 159-180, 1977
• 5 You, J. -Y., "The Protection Effect against the Wind by Using the Wind Fence with Various Porosities and the Measured Distance from the behind the Wind Fence" 25 (25): 131-134, 2005
• 6 Plate, E. J., "The Aerodynamic of Shelter Belts" 8 : 203-222, 1971
• 7 Perera, M. D. A. E. S., "Shelter behind Two Dimensional Solid and Porous Fences" 8 (8): 93-180, 1981
• 8 McClure, S., "Shelter Effects of Porous Multi-scale Fractal Fences" 163 : 6-14, 2017
• 9 Fang, F. M., "On the Flow around a Vertical Porous Fence" 67 : 415-424, 1997
• 10 Lee, S. J., "Laboratory Measurements of Velocity and Turbulence Field behind Porous Fences" 80 (80): 311-326, 1999
• 11 Jeong, U. Y., "Experimental and Numerical Investigation on the Shelter Effect of Porous Wind Fences" 584-587, 2002
• 12 Raju, K. R., "Experimental Study on Characteristics of Flow Past Porous Fences" 29 (29): 155-163, 1988
• 13 You, K. P., "Effect on Reduction Wind Speed by a Kind and Installation Distance of Windbreak Net" 25 (25): 92-95, 2007
• 14 Kim Y. M., "Effect of Protection against Wind according to the Circle Variation Porosity of Wind Fence" 8 : 107-110, 2005
• 15 Castro, I. P., "A Note on Two Dimensional Fence Bows with Emphasis on Wall Constraint" 3 (3): 1-20, 1978