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凝结对燃烧加热风洞流动影响的理论研究

发表时间:2013-08-15  浏览量:1631  下载量:673
全部作者: 林龙沅,罗喜胜,秦丰华
作者单位: 中国科学技术大学工程科学学院
摘 要: 提出一种评估燃烧加热高超声速风洞中水蒸气凝结对流场参数影响的方法。将高超声速风洞中伴随凝结的膨胀过程解耦为等熵膨胀过程和凝结过程,提出等熵膨胀界面和凝结界面的概念。根据水蒸气凝结过程中的减质和加热效应,建立流场参数相互影响下的理论模型,经计算比较,验证所提理论分析方法的可靠性。应用该方法,对高超声速流动中凝结对流场参数的影响进行系统的理论分析。结果表明:相同总温条件下,在水蒸气凝结量增大的过程中,出口流场中马赫数、静压以及静温的变化规律由加热效应起主导作用,而密度的变化规律则由减质效应起主导作用。
关 键 词: 气体动力学;凝结影响;理论模型;燃烧加热风洞;水蒸气
Title: Theoretical study on condensation effects on combustion heated wind tunnel flows
Author: LIN Longyuan, LUO Xisheng, QIN Fenghua
Organization: School of Engineering Sciences, University of Science and Technology of China
Abstract: An analytic method to estimate the condensation effects in combustion heated wind tunnel flows is proposed. The complex process of hypersonic flows with condensation is decoupled into an isentropic expansion process and a condensation process, and the concept of isentropic expansion interface and condensation interface is proposed. Based on the effects of mass reduction and heat addition in the condensation process, a theoretical model is established. The comparison of calculation results verifies the reliability of the proposed theoretical analytic methool. The theoretical analysis is then applied to the combustion-heated hypersonic tunnel flows. Results show that under the condition of the same total temperature, with the increase of mass fraction of the condensed water, the heat addition effect plays a dominant role in the variation law of Mach number, static pressure and static temperature parameters in the flow field of the tunnel exit, while the mass reduction effect plays a leading role in the variation law of density.
Key words: gas dynamics; condensation effect; theoretical model; combustion heated wind tunnel; water vapor
发表期数: 2013年8月第15期
引用格式: 林龙沅,罗喜胜,秦丰华. 凝结对燃烧加热风洞流动影响的理论研究[J]. 中国科技论文在线精品论文,2013,6(15):1419-1427.
 
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