水蒸气超声速非平衡流动中凝结激波的形态特征  

Pattern Characteristics of Condensation Shock in the Non-Equilibrium Supersonic Steam Flow

作　　者：杨勇[1] 沈胜强[1] 张琨[1] 董国海[2] 

机构地区：[1]大连理工大学辽宁省海水淡化重点实验室,辽宁大连116024 [2]大连理工大学水利工程学院,辽宁大连116024

出　　处：《工程热物理学报》2013年第1期110-114,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51206015);中国博士后科学基金(No.20110490139;No.2012T50253);中央高校基本科研业务费专项资助(No.DUT10RC(3)104)

摘　　要：引入水蒸气非平衡相变的动力学模型,并在水蒸气真实物性的基础上,建立了水蒸气超声速非平衡流动的守恒型数值计算模型,采用对激波捕捉具有高精度和高分辨率的Roe-FDS格式,数值捕捉了水蒸气超声速流动中的非平衡相变与凝结激波。以非平衡相变中液相质量增长率为基准,将非平衡凝结相变引发的凝结激波划分为凝结激波起始发生区、凝结激波交汇区和凝结激波消退区三个区域,分析了凝结激波的形成机理,得到了凝结激波发生及发展的"X"型分布特征,并归纳了凝结激波的分区物理特性和热力学特性。In the present study,a conservative compressible numerical model coupling with dynamic model for non-equilibrium phase change and Virial Equations of steam,was developed and used to predict the non-equilibrium phase change and condensation shock in the supersonic steam flow.In order to capture the transient characteristics of the supersonic flow and the condensation shock effect, the improved high resolution Roe-FDS scheme was used.Based on the simulation,the analysis of the boundary effects in the supersonic steam flow and investigation of the pattern characteristics for the condensation shock were accomplished.The process of formation for the ＂X＂ -shape and the partition characteristics of the condensation shock have been revealed.Based on the mass generation rate, the condensation shock was divided into three zones,respectively named as the condensation shock developing region,the condensation shock intersecting region and the condensation shock fadingregion. The partition characteristics,physical properties and thermodynamic characterizations for different regions have been summarized.

关 键 词：水蒸气 非平衡相变 凝结激波 分区特性 

分 类 号：O354[理学—流体力学]