Factors influencing exhaust air rate of single and double side slittype slot hood with high section

Builds a test rig of slittype hood and establishes a corresponding physical mode, and confirms the applicability of CFD simulation model. Simulates and analyses the influencing factors of the exhaust air rate, obtains the single factor relationship of the exhaust air rate with the height of the slit outlet, the slot width, the slot length and the wind velocity in the control region, and summarizes a new formula for calculating the exhaust air rate. Compares the exhaust air rate calculated by different methods, the results show that the exhaust air rate calculated by this paper method is higher than that calculated by the design manual method.