A Portable Environmental Wind Tunnel Adaptable to Field Undulating Terrain

Abstract

The invention relates to a portable environmental wind tunnel applicable to field rugged topography; a power section, a circular-to-rectangular transitional section, a shrinkage section and a rectification section are assembled to form the head part of the wind tunnel; an electric hoisting system, traveling wheels and a traction device are arranged additionally, so that the transfer of the head part in the field is facilitated; an experimental section is composed of standard components with the same specification; the standard components are connected by elastic clamps; an entrance section is of a rectangular structure, the external end of which is of an everted horn mouth; four axial flow variable-frequency blowers with parallel axes are arranged in the power section; the circular-to-rectangular transitional section is arranged between the outlets of the blowers and the shrinkage section; and the rectification section is arranged at the tail end of the shrinkage end. The portable environmental wind tunnel solves the defects that the experimental section in the prior art cannot be applicable to the field rugged topography truly, and the cross section of the experimental section is small and the like. The portable environmental wind tunnel is rational in design; the head part of the wind tunnel and the centre of the experimental section are located on a relatively same horizontal axis, and the portable environmental wind tunnel is capable of meeting the demand of the ecological environmental experience at the field rugged topography.

Description

technical field [0001] The invention relates to a portable wind tunnel device for studying the influence of wind on ecological processes. Specifically, it is a mobile wind tunnel that can be used to monitor wind erosion conditions in the field, wind and sand movement process, wind propagation process of plant seeds, pollen, pest larvae and wind influence on plant physiological and ecological processes, and rational design of farmland shelterbelts. Background technique [0002] Wind tunnels have been widely used in the study of ecological and environmental problems, such as surface wind erosion, sand flow movement process and so on. Since the 1950s, the United States, the former Soviet Union, Australia, Canada and other countries have built more than 20 different types of portable wind tunnels. In my country, the Lanzhou Desert Research Institute of the Chinese Academy of Sciences built an indoor wind tunnel for wind and sand environments in the 1960s. And so on also built a...

AI Technical Summary

Problems solved by technology

However, it still has the following problems: First, the wind tunnel test section is composed of several sections that have already been built, and the test sections are connected by flanges, so it can only conduct wind erosion research in flat areas, and the wind tunnel cannot be placed Under the condition of undulating terrain; secondly, the cross-sectional area of ​​the experimental section is small. In addition to being used for the study of wind erosion and sandstorm physics, when studying other ecological processes, the thickness of the boundary layer in the experimental section cannot meet the experimental needs.

[0003] To sum up, there are still defects in the field operations of wind tunnels at home and abroad, such as that the experimental section cannot really adapt to the undulating terrain in the field, and the experimental section has a small cross-sectional area.

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