- 期刊
連續式防風柵之防風功效研究
Study on the Effect of Wind Reduction by the Successive Windbreak Fence
摘要
本研究的目的在以數值方法，模擬連續式防風柵之鄰近流場，以探討防風柵之防風功效。研究中並從事風洞實驗，進而對數值模式參數進行驗證、比較、探討與分析。風場計算係採用微可壓縮流配合大渦模擬及有限體積法，以模擬防風柵之鄰近紊流流場。綜合研究所得結果如下：1.一道式防風柵之孔隙率為30％時，其防風功效與保護區域皆優於防風牆。2.兩道式防風柵在間距區內，其防風功效以間距16H至18H較佳。（H：防風柵高）3.三道防風柵在前後間距區內，其防風效果以間距（16H，12H）前長後短之配置置最佳。4.三道防風柵以等間距（14H或16H）之配置，在本研究個案中，其防風功效最差。
並列摘要
The purpose of this study was to explore the effect of windbreak fence by numerical method, which simulated the flow field around successive windbreak. The wind tunnel experiments were performed to verify, compare and analyze the parameters of numerical model. Additionally, to use weakly compressible flow method, large-eddy simulation and finite volume method, the turbulent flow field could be computed in the neighborhood of windbreak. The results of this study were as follows.1. The effects of wind reduction and shelter area of a single windbreak fence with 30% penetration were better than that of a windbreak wall.2. In the case of double windbreak fences, a better effect of interval distance was obtained from 16~18H, where H = fence height.3. For triple windbreak fences, the best effect of interval distance was 16H and 12H in order, i.e., the combination about the front distance long and the back short was the best.4. When the interval distances of triple windbreaks were designed as same, the worst effect of wind reduction occurred in 14H or 16H.