Study on air volume distribution and coefficient of local resistance of air cabin in complex underground engineering construction
To solve the problem of ventilation and energy saving in underground engineering construction with multiple faces and large differences in air demand,this paper takes a multi-inlet and outlet baffle-type air cabin as the research object.Relying on an underground oil storage cavern project,this paper uses a numerical simulation method to study the corresponding laws of outlet air volume distribution and local resistance coefficient of air cabins,taking the inlet air volume and baffle coverage rate as independent variables.The following conclusions are obtained:(1)The outlet air volume distribution and local resistance coefficient of each outlet baffle type air cabin are only related to the structural form of the multi-inlet and outlet baffle type air cabin,but not to the inlet air volume;(2)A"triangular"high-speed airflow area is formed at the corner of the outlet duct in the multi-inlet and outlet baffle type air cabin.The larger the baffle coverage rate is,the faster the airflow speed in the high-speed airflow area and the shorter the length of the high-speed airflow area along the outlet duct is;(3)For the multi-inlet and outlet baffle type air cabin,the air output can be adjusted by changing the baffle coverage rate.This paper gives the functional relationship between the air output rate of the baffle outlet without baffle and the baffle coverage rate,and verifies the rationality of the formula;(4)For the multi-inlet and outlet baffle type air cabin,the local resistance coefficient increases significantly when the baffle coverage rate exceeds 40％.This paper gives the functional relationship between the baffle coverage rate and the local resistance coefficient of each outlet of the air cabin and verifies the rationality of the formula.
safety and hygiene engineering technologyair cabin with bafflesnumerical simulationfunction fitting
万方数据
维普
