Droplet Transfer in Two Phase Annular Mist Flow : Part 2,Prediction of Droplet Transfer Rate
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概要
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The liquid droplet transfer onto the duct wall was studied experimentally in the previous paper, part 1. In the present paper, a method for predicting the droplet transfer rate is proposed. The droplet transfer coefficient is expressed theoretically in terms of the duct height, the eddy diffusivity and scale of turbulent motion of droplet based on an analytical model, in which are introduced a diffusion equation for droplet concentration in the turbulent core region of duct flow and a new boundary condition taking into account the behavior of droplets near the duct wall. The ratios of the eddy diffusivity and scale of turbulent motion of droplets to those respective values of gas phase are estimated from Tchen's theory by substituting empirical data of turbulent energy spectrum of single phase gas flow. The trend of predicted values for the droplet transfer coefficient agrees well with the empirical results described in the previous paper when the effect of droplet concentration on the turbulence of gas phase can be neglected. A general semi-empirical equation for the coefficient including the effect of droplet concentration is also presented.
- 一般社団法人日本機械学会の論文
著者
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NAMIE Sadahiro
Ship Research Institute
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Ueda Tatsuhiro
Faculty Of Engineering University Of Tokyo
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Namie Sadahiro
Ship Research Institute Ministry Of Transport
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