超临界锅炉水冷壁内的水动力特性分析  

Hydrodynamic Characteristics Analysis of Supercritical Water in Water-cooled Wall of Supercritical Boiler

作　　者：郝小红[1] 徐培星 马达夫 HAO Xiao-Hong;XU Pei-Xing;MA Da-Fu(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)

机构地区：[1]上海理工大学能源与动力工程学院

出　　处：《工程热物理学报》2019年第10期2334-2339,共6页Journal of Engineering Thermophysics

摘　　要：本文对1000 MW超临界塔式锅炉水冷壁内水动力特性进行了数值模拟。利用半侧加热,并且考虑了热流密度沿炉膛高度的变化,得出100VBMCR工况下相应的流场及温度场,并进一步分析流体进口温度、流量偏差与热偏差等因素对工质流场、温度场的影响.当流体进口温度、质量流速或热流密度的偏差超过临界值时,由于流体温度超过该压力下的拟临界点较远,导致工质的低密度、低比热容、低导热系数、高动力粘度,最终使得管子后半段工质温度急剧上升。Abstraet The numerical simulation of the hydrodynamic eharacteristics of supercritical water in the 1000 MW tower type supercritical boiler is carried out to analyze the flow field and temperature field under 100% BMCR,considering the heat flux varies along the height of the furnace and the half-side heating condition.And the influence of the flow field and temperature are further revealed with the variety of the inlet temperature,flow deviation and heat flux deviation.When these parameters exceed the critical value,the low density,low specific heat,low thermal conductivity and high dynamic viscosity because of the excessive temperature of the supercritical water will make the temperature of the supercritical water in the second half of the pipe augment sharply.

关 键 词：超临界锅炉 水动力特性 流量偏差 流场 温度场 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]