AERODYNAMICS OF A PORTABLE WIND EROSION TUNNEL FOR MEASURING SOIL ERODIBILITY BY WIND

被引：40

作者：

RAUPACH, MR ^{[1
]}

LEYS, JF ^{[1
]}

机构：

[1] SOIL CONSERVAT SERVICE NSW,BURONGA,NSW 2648,AUSTRALIA

来源：

AUSTRALIAN JOURNAL OF SOIL RESEARCH | 1990年 / 28卷 / 02期

关键词：

D O I：

10.1071/SR9900177

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Portable wind erosion tunnels must satisfy several aerodynamic criteria to ensure that the flow within them acceptably reproduces the atmospheric flow causing natural wind erosion.We define these criteria and use them to assess the flow and turbulence in two alternativedesigns of portable wind erosion tunnel: the first has a working section with an approximatelytriangular, ‘tent-shaped’ cross section, while the second has a conventional, rectangularworking section. The measurements were made with Pitot-static tubes and X-configurationhot-wire anemometers, over stable (non-eroding) rough surfaces, mainly mowed grass ofheight 1 cm. We found that, with careful attention to flow conditioning elements such ashoneycombs and tripping fences, an acceptable flow can be achieved in the rectangulartunnel. The flow in the tent-shaped tunnel is less satisfactory, exhibiting departures fromthe logarithmic wind profile law which depend on the surface roughness. © 1990, CSIRO. All rights reserved.

引用

页码：177 / 191

页数：15

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