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|關鍵字:||Windbreak net;防風網;Wind velocity reduction effect;Wind tunnel test;減風功效;風洞試驗||出版社:||臺中巿： 國立中興大學農學院||Project:||農林學報, Volume 61, Issue 1, Page(s) 65-83.||摘要:||
Windbreak Net is an extremely important facility of prevention of wind damage; however, windbreak net's function varies with different types; hence, the research's main purpose was to compare the differences of shelter effect with diverse windbreak net weaving types. The research adopted three types of windbreak nets of higher market share in Taiwan: plain weave, knitted weave, which had two different mesh shapes, and ribbed weave, which had two varied weaving methods. The wind tunnel test was conducted with these five sets of windbreak net, and relative wind velocity, wind velocity reduction coefficient, protection index, and economic benefit were used respectively to do comparison and make analysis to explore the influence of weaving type, mesh number and shape on wind velocity reduction effect.The test results showed that when all windbreaks had the same ventilation rate, the windbreak net of plain weave had the best shelter effect, the secondary was ribbed weave, and the worst was knitted weave; however, if both the shading and anti-insect functions were required, the windbreak net of knitted weave type was relatively more ideal to choose; yet if taking economic benefit into consideration, the windbreak net of ribbed weave was the cheapest. As for the mesh shape, triangle had better shelter effect than rectangle, and in this research case, mesh number had no significant difference in wind velocity reduction.
|Appears in Collections:||農業暨自然資源學院|
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