利用林胶茶人工群落减弱台风对橡胶林破坏机理的风洞模拟试验研究

本文研究台风登陆时（中性大层结）胶茶人工群落内部及上部风速的变化，湍流结构的变化及阻力的变化，来分析判断基减弱台风破坏的机理，评定最佳防风效果的林胶茶人工群落方案。试验研究证明台风吹向胶茶人工群落，台风越过和穿过林带，由于气流与树冠，枝叶的冲击与摩作用，使台风风速大大降低，使动能大大损失，使原来动能强和湍流弱的较大尺度旋涡的台风，变成旋涡尺度较小的动能弱湍流强的湍流，湍流能量的增强反映了风速递减率

Wind Tunnel Modelling Test on Mechanism of Weakening Typhoon's Damage to Rubber Forest by Forest-Tea- Rubber Community

In this paper, the wind velocity, turbulent structure and drag coefficient inside and above the forest-tea-rubber artificial community were observed under the condition of neutral atmosphere. The best type of community for wind break was decided through studying the mechanism of weakening Typhoon's damage to rubber forest. The experimental results show that wind velocity and kinetic energy(KE)reduced significantly due to friction with the tree canopy and leaves when Typhoon passed through the community. The larger scale Typhoon with higher KE and weaker turbulence turned into smaller scale eddy with weaker KE and higher turbulence.Increment of turbulant energy leading to increment of attenuation rate of wind velocity, and decrement of turbulence transfer. As a result damage of rubber forest made by Typhoon was decreased remarkably. Due to forest-tea-rubber community of two row in clumps has the maximum attenuation rate of wind velocity and minimu turbulence transfer. Thus this type of the community has the best wind protection effect and to be consided as the best type for protecting rubber forest from Typhoon.