林业科学2011，Vol.47Issue(2)：95-102,8.
两行一带式乔木固沙林带风速流场和防风效果风洞试验
Windbreak Effects and Wind Velocity Flow Field of Low Density Forest with Two-Line-One-Belt Distribution Patterns of Single-Belt Scheme
摘要
Abstract
In order to compare the wind-preventing effect of three patterns of wind flow field, horizontal and vertical wind speed changes was studied under the condition of tunnel, with the “ two-row in one-belt pattern” in arbor sand-fixing forest and with the coverage of 20％ and 25％ , and the experimental wind velocity was set 10 and 15 m·s -1 ,respectively.The result indicated that :a complex wind flow field formed under four centimeters in height in three kinds of configuration mode, the field structure was composed of the wind shadow and the wind speed acceleration areas. The “two-row in onebelt pattern”with the coverage of 25％ was better than that with the coverage of 20％. The change of wind speed showed the same pattern at different heights in the three different patterns. They were able to be divided into three layers-microlevel changes( 1. 54H and 2H), significant change in layer ( 0. 46H and 0. 92H), and stable changes in layer ( 0. 06 ～ 0. 12H). The effect of reducing wind speed of three patterns showed that the windbreak effect of the D = 4H( H is the spacing interval between the forest belts), L = 4 cm( L is row spacing) was better than D = 5H, L = 0. 08 m and coverage of 20％ (D =5H,L =0. 04 m) ,and the last two modes had the same effect.关键词
风洞试验/两行一带模式固沙林/风速流场/防风效果Key words
wind tunnel/ two-line-one-belt distribution pattern (TLOP)/ wind velocity flow field/ windbreak effect分类
农业科技引用本文复制引用
杨文斌,王晶莹,董慧龙,王林和,张国盛,卢琦,赵爱国..两行一带式乔木固沙林带风速流场和防风效果风洞试验[J].林业科学,2011,47(2):95-102,8.基金项目
国家自然科学基金项目(40971283,30660155),国家"十一五"科技支撑项目(2007BAC03A1003,2007BAD46B07). （40971283,30660155）
