【作者】 林龙沅； 罗喜胜； 秦丰华；

【Author】 Lin Longyuan,Luo Xisheng,Qin Fenghua (Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China)

【机构】 中国科学技术大学近代力学系；

【摘要】 为了研究高超喷管中水蒸气相变对斜劈前后测量参数的影响,本文从理论分析的角度出发,将高超流动的水蒸气相变过程解耦为等熵膨胀过程、凝结过程、斜激波过程以及蒸发过程,并提出等熵界面、凝结界面、斜激波界面和蒸发界面的概念,根据水蒸气相变过程中的减质(添质)效应和加热(冷却)效应,建立流场参数相互影响下的理论模型,研究高超流动中水蒸气相变对斜劈前后测量参数的影响机理,并对建立的理论模型结果与数值计算结果进行验证,验证结果表明,二者符合得较好,误差较小。更多还原

【Abstract】 In order to study the effect of water vapor phase transition on flow field parameters over wedge in hypersonic wind tunnel, from the theoretical analysis point of view,this paper decouples the phase transition phenomenon occurring in the hypersonic flow into isentropic expansion process,condensation process,oblique shock wave process and evaporation process,proposes the concept of isentropic interface,condensation interface.oblique shock wave interface and evaporation interface.Based on quality reduction (addition) effect and heating(cooling) effect in the water vapor phase transition process.the paper establishes a theoretical model under the mutual influence of flow parameters,studies the influence mechanism of water vapor phase transition in hypersonic flow field upon flow parameters,verifies the theoretical model results and numerical results,showing that both are quite consistent and have less error.更多还原