隣接複開口部を介した浮力駆動置換流 : 開口部断面形状の影響

概要

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Buoyancy-driven helium-air exchange flow through double openings was experimentally investigated. The double openings with rectangular cross-section (w/2×d) were settled side by side in w direction. The exchange flow rate and the flow pattern around the openings were simultaneously measured. To clarify the effect of geometry, the cross-section of the opening was systematically varied. Under the smaller d/w geometry, the separated flow pattern (s) was observed, in which the upward and downward flows flew separately in the double openings, respectively. Under the larger d/w geometry, the unseparated flow pattern (u) was observed, in which the upward and downward flows flew inside the openings. The counter-current flows were observed in the openings. The exchange flow rate was a function of the flow pattern. For the flow pattern (s), the exchange flow rate could be predicted using the flow network model with considering the entrainment. For the flow pattern (u), the flow in the opening was same as the exchange flow through a single opening with the same geometry.
一般社団法人日本機械学会の論文
1998-09-25