摘要
我国在设计自然通风冷却塔时,常用的计算通风总阻力系数的经验公式,设计单位普遍反映,计算结果偏大、不合理。根据计划要求,经过多年的摸索,通过试验和计算相结合,本文给出了自然通风逆流式冷却塔通风阻力的计算公式。
In China, to calculate airflow resistance coefficient of a natural draft cooling tower, the following experimental equation is usedWhere: D is the diameter of a tower ; h is the inlet height ; F is the area at elevation of the packing; F1 is the outlet area; ξf is the resistance coefficient of the drench device.Equation (1) has obvious defects because it contains no influence of water loading, airflow velocity and the herringbone columns etc.In this paper, a new equation for the caluclation of the airflow resistance coefficient of a cooing tower from the inlet to throat has been obtained as following:Where: ε is the rate of the inlet area to the area at elevation of the packing, other symbols are same as above.Equation (2) is used under the condition that there is no water, while equation (3) is used for rain zone. Therefore, the airflow resistance coefficient for a cooling tower from inlet to throat isEquation (4) can be used in normal design conditions.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1993年第4期462-474,共13页
Chinese Journal of Hydrodynamics
