水平二相ヘッダー管の水分配挙動(流体工学,流体機械)

概要

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Flow header for small multiple pipes is commonly used in boilers and heat exchangers. The system contributes to raise the heat transfer efficiency in the components. The flow distribution mechanism of the header for water has been studied and the calculation procedure for the design has been recommended for a single-phase condition. It is also recommended to avoid the bubbles in the header to obtain a uniform water flow rate to each small pipe. But in some cases, the header has to be used to distribute a flow containing bubbles. Distribution behavior of water with a gas-phase was studied experimentally in a horizontal header with four vertical pipes. The prediction method developed for a single-phase fluid was extrapolated to the two-phase flow. The prediction agreed well with the experimental results. In the present experimental header, it was possible to distribute water uniformly with protrusive branch pipes inside of the header and the effect of protruding length on the water distribution behavior was also studied.
一般社団法人日本機械学会の論文
2003-01-25