Heat transfer to boiling binary liquid mixtures at atmospheric and subatmospheric pressures
Heat transfer to boiling binary liquid mixtures at atmospheric and subatmospheric pressures
复制标题
在大气压和低于大气压下沸腾二元液体混合物的传热
DOI：
10.1016/0009-2509(56)80004-3
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发表时间：
1956
影响因子：
4.7
通讯作者：
S. Stralen
中科院分区：
文献类型：
--
作者：
S. Stralen
在常压和42 cm Hg压力下，测量了水平铂丝电加热到水、甲乙酮和含4.1%甲基乙酮的水溶液的热流密度，并在对流沸腾和成核沸腾范围内进行了测量。由于受热面上产生的气泡平均尺寸增大，曲线一般向较低的传热方向移动。在所研究的两种压力下，4·1%混合物的最大核沸腾热流密度远远超过水中的相应热流密度。系统地测定了水与甲基乙酮、丙酮和低碳醇混合物在几个亚常压下的核态沸腾最大热流密度与浓度的函数关系。在所有混合物中，最大热流密度的最大值出现在一定的低有机组分浓度时，该最大热流密度与压力基本无关。在相同压力下，这些极大值与水中的最大值之比随着压力的降低而减小。
The heat flux from an electrically heated horizontal platinum wire to water, to methylethylketone and to an aqueous mixture containing 4·1 % wt. of methylethylketone was determined throughout the ranges of convection and nucleate boiling, both at atmospheric pressure and at a pressure of 42 cm Hg.A general shift of the curves to lower heat transfer occurred with decreasing pressure, as a consequence of the increasing average size of vapour bubbles, generated on the heating surface. The maximum in nucleate boiling heat flux to the 4·1 % mixture exceeded considerably the corresponding value in water at both pressures investigated.Maximum heat flux in nucleate boiling has been determined systematically as a function of concentration in a range of concentrations with water in excess, for mixtures of water and methylethylketone, acetone and the lower aliphatic alcohols respectively at several subatmospheric pressures.In all mixtures a maximum value of the maximum heat flux occurred at a certain low concentration of organic component, which was approximately independent on pressure. The ratio of these maxima to the maximum value in water at the same pressure decreased with decreasing pressure.