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文中研究在风速为10m/s和15m/s的风洞实验条件下,覆盖度为20%和25%的两种单行一带模式固沙林内的水平和垂直空间的风速变化情况,达到对两种不同模式的风速流场和防风效果进行比较分析的目的。通过分析可以得出,两种配置模式都形成了风影区和风速加速区相互组合的复杂的水平流场结构。两种模式对垂直空间风速影响相近,根据对不同高度风速的不同影响划分为地表加强层(0.8 cm以下)、微变化层(1.2 cm)、显著变化层(1.6 cm和3 cm)和稳定变化层(6 cm-35 cm)这四个变化层。从距地表1.6 cm高度开始,垂直空间风速变化沿来风方向的风速总体上是逐步减小的趋势,且在林带处会出现一个峰值。总的来讲两种模式降低水平空间和垂直空间风速的效果都相同,但沿林带方向降低水平空间风速的效果有所不同,两种模式降低垂直风速的效果从地表向上都表现出先增加后减少的趋势。
In this paper, wind speed changes of horizontal and vertical space in two kinds of single-row and single-mode sand-fixation forests with wind speed of 10m / s and 15m / s are studied. Mode wind speed and wind-proof effect of the purpose of comparative analysis. Through analysis, it can be concluded that the two configuration modes form a complicated horizontal flow field structure in which the wind-shadow zone and the wind-speed acceleration zone are combined with each other. The two models have similar effects on wind speed in vertical space. According to the different effects on wind speed at different altitudes, the two modes are classified into three types: the surface strengthening layer (below 0.8 cm), the micro-changing layer (1.2 cm), the significant changing layer (1.6 cm and 3 cm) Layer (6 cm-35 cm) of these four change layers. Starting at a height of 1.6 cm from the ground surface, the wind speed along the wind direction in the vertical space tends to decrease gradually as a whole, and a peak appears at the forest belt. Generally speaking, the effect of reducing wind speed in horizontal space and vertical space are the same in both modes, but the effect of reducing wind speed in horizontal space along the belt direction is different. The effect of reducing the vertical wind speed in both modes firstly increases and then decreases the trend of.