风压作用下的自然通风阻力特性的探讨

Discussion on the Resistance Property of Natural Ventilation Induced by Wind Force

探讨了风压作用下大开口的自然通风阻力特性 ,并提出了用局部损失迭加法来计算阻力损失 ,即认为通过建筑物的气流是由不同的突缩段和突扩段的组合 .由此可推出进、出口的流量系数不同 ,从而得到一种简单的估算自然通风量的计算方法 .与试验值进行验证 ,相比通常的计算方法 ,此方法误差更小 .

Through the discussion of the resistance properties of natural ventilation induced by wind force, a method of local pressure loss superposition was proposed to calculate the pressure loss. Airflow through buildings is composed of the sudden contraction section and the sudden expansion section. From this, we can conclude that the discharge coefficients of the inlet opening and the outlet opening are different. A simple method to estimate the flow rate through buildings with large openings was obtained, and compared with the experimental results, the calculated values with the above mentioned method perform better than those with the conventional method.