CAJ | 학술논문

通过将膜状凝结和珠状凝结理论相结合建立了一个新的模型,用于计算酒精-水混和蒸气Marangoni凝结换热系数,该模型引入一个特性系数将膜状凝结和珠状凝结理论相结合,并考虑了酒精浓度、蒸气压力和流速的影响.在不同的压力和流速下,模型计算的结果与实验和相关文献进行了比较,最大误差为±30%.
통과장막상응결화주상응결이론상결합건립료일개신적모형,용우계산주정-수혼화증기Marangoni응결환열계수,해모형인입일개특성계수장막상응결화주상응결이론상결합,병고필료주정농도、증기압력화류속적영향.재불동적압력화류속하,모형계산적결과여실험화상관문헌진행료비교,최대오차위±30%.
An attempt is made to calculate a heat transfer coefficient(HTC)by combining the filmwise theory with the dropwise notion for ethanol-water mixture condensation.A new model,including ethanol concentration,vapor pressure and velocity,is developed by introducing a char-acteristic coefficient to combine the two theories mentioned above. At different concentration,pressure and velocity,the calculation is compared with experimental results.It turns out that the calculated value is in good agreement with the experimental results.the maximal error is within±30%.