824 直交二相流中の流力弾性振動に関する水・空気系と水・蒸気系との相似性の考察(動力エネルギーの基盤技術I)(OS.9 動力エネルギーの基盤技術 : 動力エネルギーシステム部門企画)

概要

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We had better use steam-water system in experiment to estimate the fluid-elastic vibration of the heat-transfer tube bundle in two-phase cross flow since the phenomena is very complicate, but the cost becomes very high. In this paper, the applicability of freon or air-water system to simulate steam-water system is considered. Fluid-elastic force and the stability boundary, at which only liquid phase flows, are compared with those, at which only gas phase flows. In low void fraction, fluid-elastic force due to liquid can be dominant, and air-water system may simulate steam-water system. In high void fraction, fluid elastic force due to gas cannot be negligible, and air-water system can underestimate the fluid elastic force due to gas phase. Freon can give better result even if the void fraction is high.
社団法人日本機械学会の論文
2001-03-09