凝縮を伴う超音速ノズル流れにおける全圧損失の数値解析
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概要
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A rapid expansion of moist air or steam in a supersonic nozzle gives rise to condensation and the total pressure of the flow is reduced by this nonequilibrium phenomenon. In the present paper a numerical method is presented for determining the total pressure loss due to condensation of steam expanding in a supersonic nozzle, assuming that the flow is one-dimensional, inviscid, steady flow and the steam is perfect both thermally and calorically. Based on the calculated results, the effects of degree of superheat of steam and the shape of nozzle on the total pressure loss have been discussed. In the case of steam condensation, the loss in total pressure occurs in the nonequilibrium condensation region and the total pressure loss increases with an increasing degree of superheat of steam. Further, the higher the expansion rate of nozzle is, the larger the total pressure loss becomes. The values of the total pressure loss are about 3 to 8 percent in the present calculations.
- 九州大学大学院総合理工学研究科の論文
- 1987-01-26
九州大学大学院総合理工学研究科 | 論文
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