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首页> 外文期刊>International Journal of Heat and Mass Transfer >SIMILARITY OF TRANSPORT PROCESSES IN FLUIDIZED BEDS
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SIMILARITY OF TRANSPORT PROCESSES IN FLUIDIZED BEDS

机译：流化床中运输过程的相似性

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摘要

the theory of similarity of heat and mass transfer processes in bubble fluidized beds is developed. It is based on the account for a main specific feature, which distinguishes a fluidized bed from other gas-solid systems, viz.a two-phase structure of the bed: the presence of bubble and emulsion phases. The existence of these phases determined the character of transport processes in the system in many respects and imparts a number of unique properties to the system that are widely used in engineering (isothermicity, high values of he coefficients of thermal conductivity and heat transfer, etc). A system of dimensionless governing parameters which characterize local and integral similarity of fluidized beds is found. It is shown that Fr and Ar numbers can serve as basic dimensionless characteristics of bubble and emulsion phases. The employment of these numbers makes it possible to obtain generalized relations for calculating transport characteristics of fluidized beds which are distinguished by simplicity, physical and large universal nature.
机译：建立了气泡流化床传热和传质过程相似性的理论。它基于一个主要的特定特征，该特征将流化床与其他气固系统区分开，即床的两相结构：气泡和乳液相的存在。这些相的存在在许多方面决定了系统中传输过程的特征，并赋予了系统广泛用于工程中的许多独特属性（等温性，高导热系数和热传递系数等）。 。发现了一个无量纲的控制参数系统，该参数表征了流化床的局部和整体相似性。结果表明，Fr和Ar数可作为气泡和乳液相的基本无量纲特征。这些数字的使用使得可以获得用于计算流化床的输送特性的一般关系，其以简单，物理和大通用性为特征。

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