OS10-8 超音速蒸気インジェクター内の熱流体挙動に関する研究(OS10 混相流の計測技術と解析,循環型社会における動力エネルギー技術)

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  • OS10-8 Study on thermal-hydraulic behavior in supersonic steam injector

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Supersonic steam injector is the one of the most possible technologies for next generation nuclear reactor systems. The supersonic steam injector has dual functions of a passive jet pump without rotating machine and a compact and high efficiency heat exchanger, because it is operated by the direct contact condensation between supersonic steam and subcooled water jet. In order to apply the steam injector to actual reactor systems, it is necessary to clarify the flow behavior and heat transfer in the supersonic steam injector which are governed by the complicated turbulent flow with a great shear stress of supersonic steam. However, in previous study, there is little study about the turbulent heat transfer and flow behavior under such a great shear stress at the gas-liquid interface. In the present study, radial velocity distributions and radial temperature distributions are measured experimentally. Turbulent flow behavior including the effect of the interface between water jet and supersonic steam is developed based on the eddy viscosity model. Radial velocity distributions and the turbulent heat transfer are calculated with the model. The calculation results are compared with the experimental results done with the transparent steam injector.

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