Based on the S1210 airfoil,a wind catcher based on the Coenda effect was de-signed,and the actual ventilation effect of an underground space with a size of 30 m×20 m×3.5 m was studied under the condition of natural wind speed of 3 m/s,and the re-sults showed that the number of indoor ventilation was more than 1 time under different trap heights,and with the increase of the height of the trap,the velocity value of the air duct inlet and outlet increased and the negative pressure value decreased.The maximum pressure difference between the inlet and outlet is 1.3 Pa,the lowest negative pressure value of the negative pressure area formed on the airfoil wall is-14 Pa,and the ventilation volume increases with the increase of the height of the wind catcher,but the growth rate of the ventilation volume decreases continuously due to the increase of friction resistance in the round pipe at the same time.Increasing the height of the wind catcher has an effect on increasing the ventilation capacity,and the effect decreases with the increase of the height.The working condition with the natural wind speed of 1 m/s～5 m/s is studied,and the re-sults show that when the natural wind speed is more than 3 m/s,the ventilation rate of un-derground space with two airfoils can reach 1.5 times/h.
维普
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