Large-scale low-temperature controllable atmospheric boundary layer test system and method for wind and snow simulation

Abstract

The invention provides a large-scale low-temperature controllable atmospheric boundary layer test system and method for wind and snow simulation, and the system comprises an atmospheric boundary layer wind tunnel, a plenum chamber and a refrigeration system, the atmospheric boundary layer wind tunnel comprises an upper flow channel and a lower flow channel which are communicated end to end, and a power section is arranged in the upper flow channel; a stable section, a contraction section and a test section are sequentially arranged in the lower flow channel, transition sections are arranged at corners of the backflow type wind tunnel, a fan is arranged in the power section, and an air heat exchanger is arranged in the stable section; the storage room is used for storing snow particles, the operation room is provided with a snow particle vibration sowing device, the storage room is located at the upper part of the stable section, an air cooler is arranged in the storage room, the operation room is located at the upper part of the test section, and the snow particles sown by the snow particle vibration sowing device uniformly fall into the test section; and the refrigerating system outputs a secondary refrigerant for the air cooler in the residence room and the air heat exchanger of the air tunnel of the atmospheric boundary layer for heat exchange. Simulation of the natural snowfall process is achieved through cooperative use of all the parts of the system.

Description

technical field [0001] The invention belongs to the field of atmospheric boundary layer low-temperature wind and snow environment simulation in construction engineering, and in particular relates to a large-scale low-temperature controllable atmospheric boundary layer test system and method for wind and snow simulation. Background technique [0002] Snow disaster, also known as white disaster, is a natural disaster caused by long-term and large-scale snowfall. The occurrence of snow disasters is generally accompanied by various secondary disasters, such as traffic jams, damaged lines, reduced grain production, closed pastures, and collapsed buildings. Among them, the collapse of buildings has been widely concerned by the society because it directly endangers people's lives and property safety. According to the accident investigation, in addition to the sudden increase in snowfall, which caused the building roof load to far exceed the design value, when the airflow flows thr...

AI Technical Summary

Problems solved by technology

Existing wind tunnels are mainly used for research on snow covering of small-scale objects such as vehicles in transportation, so they cannot restore the atmospheric boundary layer environment around large-scale objects such as buildings; The field wall effect is significant, and when the 3D building model is tested, the blocking rate cannot meet the requirements, and it is impossible to carry out the wind-induced snow drift research on the roof of the large-span spatial structure

Images