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根据某拟建的大型双曲冷却塔实际尺寸按照1∶300的比例制作了刚性模型,在其外表面沿高度由上至下布置5道环向测层,每层36个测点,将其放在边界层风洞中进行三塔干扰试验。测试结果表明,在三塔受风荷载作用时,前塔的阻挡作用明显,后塔的时均风力显著减小,但脉动风压却明显增大,使得极值干扰系数增大。同时得到了极值干扰系数最大时的响应干扰系数,给出了考虑三塔干扰的工程设计的干扰系数建议值。
According to the actual size of a proposed large hyperbolic cooling tower in accordance with the ratio of 1: 300 to produce a rigid model, the outer surface of the height from top to bottom arrangement of 5 ring measuring layer, 36 measuring points each layer, its On the boundary layer wind tunnel for three towers interference test. The test results show that when the three towers are under the wind load, the blocking effect of the front tower is obvious, the hourly average wind force of the rear tower is significantly reduced, but the fluctuating wind pressure is obviously increased, which makes the extreme value interference coefficient increase. At the same time, the response interference coefficient at the maximum of the maximum interference coefficient is obtained, and the recommended value of the interference coefficient of the engineering design considering the three-tower interference is given.