推导了组合式空冷器所需风量与总热负荷、环境温湿度及热流体交界温度的多公式关联的隐函数关系.取1 000个有实际意义的工况点,拟合了需风量与各变量之间的显函数公式.结果表明:需风量随热负荷线性增加,随环境湿度线性增加;环境温度25℃以上时,需风量随环境温度增减的幅度较大,环境温度10℃以下时,需风量随环境温度增减的幅度较小;热流体交界温度越高,需风量越小.拟合公式反映了各因素影响下的风量需求规律. The implicit function relationship of the multi-formula correlation between the required air volume and the total heat load, ambient temperature and humidity and the junction temperature of the hot fluid is deduced.According to 1 000 practical operating points, The results show that the amount of air required increases linearly with the heat load and increases linearly with the ambient humidity. When the ambient temperature is above 25 ℃, the amount of air required increases or decreases with the increase of ambient temperature. When the ambient temperature is below 10 ℃, , The amount of air required increases or decreases with the ambient temperature is small; the higher the junction temperature of hot fluid, the smaller the amount of air required. Fitting formula reflects the demand of air volume under the influence of various factors.