下导风工程的风洞实验研究——[1]平面上的实验

下导风工程是由栅栏工程发展而来的,它应用于防治风沙、风雪对道路(铁路、公路)的危害,国内外已做过不少工作^[1][2][3]。但是,在风洞中进行系统的实验研究还很少。我们从1969年开始,先后对下导风工程防治道路风沙(雪)危害,进行了一系列的风洞模似实验研究,取得了初步成果。

Studies on the effects of Fence in Wind Tunnel Part. 1.Experiment with level snuface

Blower fence has been widery used to tne protection of agriculture,communications, industry and mining engineering from the wind-or snow-drifting damages Tsut the researches and experiments on the control mechanism, the selection of various elements in the projects and the optimum disposition have seldom been studied.Therefore we have carried out a series of simulating experiments and ana Ityical reserches in the wind tunnel and the results obtained have been verified in the field. The level surface experiments both in the wind tunnel and the field have proved that blower fence will be effective through changing the original flow field and forming a new distribution of energy,and its optimum blowing power is produced at a porosity ρ=0.4-0.5 and a dip angle of 90°.