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暖通空调杂志社>期刊目次>2017年>第12期

喷淋初角对立式喷淋室内传热传质效果的影响

Influence of initial spray angle on heat and mass transfer in vertical spray chambers

鲍玲玲 赵 旭 王景刚
河北工程大学

摘要:

建立了二维水滴运动、传热传质及的数学模型。利用四阶龙格-库塔方法,进行了传热传质及的数值计算,分析了不同喷淋初角下水滴在喷淋室内的运行时间、运行距离和气-水热质交换参数的变化情况。结果表明,在初始速度一定的情况下,随着喷淋初角的减小,水滴在喷淋室内的运行时间延长,运动路程变长,换热量增大,损增大,但均变化很小。

关键词:喷淋初角,立式喷淋室,传热传质,换热量,损

Abstract:

Establishes the two-dimensional mathematical models of water droplet movement, heat and mass transfer and entransy. Makes the numerical calculation of heat and mass transfer and entransy by the fourth-order Runge-Kutta method, and analyses the water droplet movement time, running distance and heat and mass transfer parameters of air and water in the spray chamber at different initial spray angles. The results show that at a constant initial velocity, the duration time and movement distance of water droplets would be longer in the spray chamber, the heat transfer rate and the entransy loss would increase along with the initial angle decreases, but all the changes are very small.

Keywords:initialsprayangle,verticalspraychamber,heatandmasstransfer,heatexchangequantity,entransyloss

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