| 林带阻力系数与透风系数关系的理论分析 |
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| 引用本文： | 周广胜,朱廷曜.林带阻力系数与透风系数关系的理论分析[J].应用生态学报,1994,5(1):43-45. |
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| 作者姓名： | 周广胜 朱廷曜 |
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| 作者单位： | 中国科学院沈阳应用生态研究所，中国科学院植物研究所 |
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| 摘 要： | 根据冲量定理分析了林带对气流的阻力，首次得到了林带阻力系数的估算模式（Ｃｄ＝（１．８＋０．２α）（１－α）ｓｉｎ２ω，并利用有关文献发表的资料进行了验证．文章还对来流平行林带时林带对气流的阻力进行了讨论，指出来流平行林带时林带对气流的阻力仅为来流垂直林带时林带对气流阻力的０．７—１．１％，可以不予考虑．
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| 关 键 词： | 林带阻力，阻力系数，透风系数 |
Theoretical analysis on the relation of drag coefficient to permeability of windbreaks |
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| Zhou Guangsheng and Zhu Tingyao.Theoretical analysis on the relation of drag coefficient to permeability of windbreaks[J].Chinese Journal of Applied Ecology,1994,5(1):43-45. |
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| Authors: | Zhou Guangsheng and Zhu Tingyao |
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| Abstract: | The drag of windbreak is analysed by impulse theorem in this paper.A simulation model of drag coefficient of windbreak,Cd=(l.8 0.2a)(1-a)sin'ro,is presented, and it is tested in terms of those data from published papers.A parallel--force of windbreak is also discussed.The parallel -force of windbreak whose value is 0.7--1.1% of the normal force can be neglected. |
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| Keywords: | Drag of windbreak Drag coefficient of windbreak Permeability of windbreak |
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