대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제24권4호
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  • Pages.485-494
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  • 2000
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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비등을 수반하는 발열면에 충돌하는 수분류의 임계열유속에 관한 연구

Critical Heat Flux of an Impinging Water Jet on a Heated Surface with Boiling

  • 발행 : 2000.04.01
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초록

The purpose of this paper is to investigate a critical heat flux(CHF) during forced convective subcooled and saturated boiling in free water jet system impinged on a rectangular heated surface. The surface is supplied with subcooled or saturated water through a rectangular jet. Experimental parameters studied are a width of heated surface, a height of supplementary water and a degree of subcooling. Incipient boiling point is observed in the temperature of 6${\~}8^{\circ}C$ of superheat of test specimen. CHF depends on jet velocity for various boiling-involved coolant system. CHF also is proportional to the nozzle exit velocity to the power of n, where n is 0.55 and 0.8 for subcooled and saturated boiling, respectively. CHF is enhanced with a higher jet velocity, higher degree of subcooling and smaller width of a heated surface.

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참고문헌

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