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研究了自然通风湿式冷却塔底部周向进风随着外界侧风变化的规律,整个研究在一个热态模型冷却塔试验台上进行.研究表明:无风时,塔底周向进风是均匀轴对称的,即塔内填料各处的传热传质性能也是轴对称分布的.但侧风环境下,外界侧风破坏了冷却塔底部周向进风的轴对称分布规律,侧风风速大于0.2 m/s时各处进风越不均匀.与无风工况相比,当侧风风速为0.5 m/s时,迎风面进风口风速为无风时的1.875倍,而背风面进风口风速仅为无风时的30%.因此,外界侧风影响了进入塔内的总体通风量,恶化了塔内的传热传质性能.
The research on the change of the inlet air around the bottom of natural draft wet cooling tower with the outside crosswind is carried out on a test bench of a thermal model cooling tower.The results show that the air entering the bottom of the tower is uniformly axisymmetric when there is no wind, That is, the heat and mass transfer performance around the packing in the tower is also axisymmetrically distributed, but in the crosswind environment, the outside crosswind destroys the axisymmetric distribution of the air entering the bottom of the cooling tower. When the crosswind wind speed is more than 0.2 m / s When the crosswind wind speed is 0.5 m / s, the wind speed of the windward inlet is 1.875 times of the windless time, and the wind speed of the leeward air inlet is only when there is no wind Of 30% Therefore, outside crosswind affects the overall amount of ventilation into the tower, deteriorating the tower heat and mass transfer performance.