凝縮を伴う超音速ノズル流れの数値解析
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Condensation initiated by homogeneous nucleation has been investigated theoretically for the case of rapid expansion of steam in a supersonic nozzle. The equations of motion together with the nucleation rate and the droplet growth equations were solved numerically, assuming that the flow is steady, one-dimensional, and inviscid. As the result, the effects of surface tension of the droplet, condensation coefficient and degree of superheat of the steam on the distributions of pressure, Mach number, and other flow properties along the nozzle were clarified. Furthermore, the formation process and the stability of a condensation shock were discussed. The location where the shock stays in the nozzle shifts towards the nozzle throat when the degree of superheat decreases, and if the degree of superheat becomes lower than a certain value, self-excited oscillation of the flow occurs due to the instability of the condensation shock.
- 九州大学大学院総合理工学研究科の論文
- 1981-12-30
九州大学大学院総合理工学研究科 | 論文
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