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A Study of Under-expanded Moist Air Jet Impinging on a Flat Plate

A Study of Under-expanded Moist Air Jet Impinging on a Flat Plate
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摘要 When a gas expands through a convergent nozzle in which the ratio of the ambient to the stagnation pressures is higher than that of the critical one, the issuing jet from the nozzle is under-expanded. If a flat plate is placed normal to the jet at a certain distance from the nozzle, a detached shock wave is formed at a region between the nozzle exit and the plate. In general, supersonic moist air jet technologies with non-equilibrium condensation are very often applied to industrial manufacturing processes. In spite of the importance in major characteristics of the supersonic moist air jets impinging to a solid body, its qualitative characteristics are not known satisfactorily. In the present study, the effect of the non-equilibrium condensation on the under-expanded air jet impinging on a vertical flat plate is investigated numerically in the case with non-equilibrium condensation, frequency of oscillation for the flow field becomes larger than that without the non-equilibrium condensation, and amplitudes of static pressure become small compared with those of dry air. Furthermore, the numerical results are compared with experimental ones.
出处 《Journal of Thermal Science》 SCIE EI CAS CSCD 2005年第4期334-340,共7页 热科学学报(英文版)
关键词 compressible flow non-equilibrium condensation impinging jet simulation. 潮湿空气 射流 喷射碰撞 压力流程 非平衡浓缩
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参考文献7

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