Low-energy-consumption efficient wind tunnel capable of simulating snowfall process

Abstract

The invention discloses a low-energy-consumption efficient wind tunnel capable of simulating a snowfall process. The low-energy-consumption efficient wind tunnel comprises a gas inlet, a power section, a diffusion section, a stable section, a refrigeration section, a water mist generating section and a test section which are connected in sequence, wherein a fan is mounted in the power section; a liquid nitrogen spray head is arranged in the refrigeration section, and connected with a liquid nitrogen source to form a liquid nitrogen refrigeration system through a liquid nitrogen pipeline; an atomizing pneumatic spray nozzle is arranged on the upper part of the water mist generating section, the atomizing pneumatic spray nozzle is connected with a pressure gas source and a pressure water source; a splitter plate is arranged below the atomizing pneumatic spray nozzle; a pitching angle of the splitter plate is adjustable. The low-energy-consumption efficient wind tunnel can be used for accurately simulating wind and snow motion effect of an actual snowfall process to a large-span space structure, and has the advantages of being low in test energy consumption, high in efficiency, simple in structure, low in manufacturing cost, and low in operation and maintenance charge in comparison with a large-scale ice wind tunnel.

Description

technical field [0001] The invention relates to a low-energy and high-efficiency wind tunnel capable of simulating the snowfall process, which can be used for the simulation of large-span spatial structures subjected to the coupling effect of wind and snow two-phase flow considering the snowfall process in the field of building structure engineering, and the roof of large-span spatial structures and their surroundings Simulation of wind-induced snow drift. Background technique [0002] Climate change characterized by global warming has led to the frequent occurrence of extreme disasters such as strong winds and snowstorms that occur once in 50 or even 100 years, resulting in an increase in the extreme value of wind and snow coupling loads. On the other hand, the long-span spatial structure is developing in the direction of light weight, large size, complex shape, and transparent roofing materials, which makes it more sensitive to wind and snow loads. In recent years, the co...

AI Technical Summary

Problems solved by technology

However, this type of ice wind tunnel is expensive to build, and the operation and maintenance costs are also very high. The large-scale refrigeration and atomization equipment equipped with it is extremely powerful, which makes the ice wind tunnel test a test item that consumes a lot of money and energy. It is generally used for Productive experiments, the usual scientific research experiments are difficult to undertake

Moreover, the test period of the large-scale ice wind tunnel is long, and it usually takes several days to achieve the required wind and snow movement environment, which further increases the time cost of conducting scientific research experiments

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