变马赫数喷管中湿蒸汽流动数值模拟  

Numerical Simulation of Wet Steam Flow in a Variable Mach Number Nozzle

作　　者：何乃波[1] 蔡小舒[1] 

机构地区：[1]上海理工大学动力工程学院,上海200093

出　　处：《热力透平》2010年第3期154-158,共5页Thermal Turbine

基　　金：国家自然科学基金重点项目(50336050)

摘　　要：Fluent Wet-Steam Model是基于经典成核理论,在全欧拉坐标系下描述自发凝结过程的。本文基于该模型对变马赫数槽式喷管内伴随自发凝结的水蒸汽的跨音速流动过程进行了数值模拟,研究水蒸汽在跨音速流动过程中的自发凝结、液滴生长、凝结冲波等现象以及背压变化对流场参数的影响。对蒸汽透平的通流部分设计提供参考,以及为湿蒸汽风洞设计提供参考。The wet-steam model in FLUENT is on the basis of classical theory of nucleation and is used for description of the spontaneous condensation process in the framework of Eulerian coordinates.With this model,the author performed numerical simulation of the transonic vapor flow with concurrent spontaneous condensation in a slotted nozzle,and studied the law of spontaneous condensation,droplet growth and condensation shock waves.These results may be valuable reference to the design of the flow-through part of steam turbines as well as that of wet steam tunnels.

关 键 词：水蒸汽 变马赫数槽式喷管 自发凝结 数值模拟 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]