汽轮机静叶内压传递特性研究  

Analysis of Pressure Exergy Transfer Characteristics in Steam Turbine Static Blades

作　　者：张明智[1] 袁晖[1] 郭婷[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《电力科学与工程》2015年第2期12-16,共5页Electric Power Science and Engineering

摘　　要：为了对汽轮机静叶内气体流动过程中的压力、速度以及传递系数的变化特征有更深的认识,从水蒸气在汽轮机级内静叶部分的流动特点出发,以热力学第一、第二定律及非平衡热力学理论的传递理论为依据,建立了水蒸气在汽轮机级内静叶部分流动的传递模型,导出了汽轮机静叶内的压流密度、压传递系数的计算方法及其随气流出口面积的变化趋势,从传递的角度分析了汽轮机级内静叶部分的传递特性,为以压力为主势场的传递模型提供了理论依据。In order to have a deeper understanding on the gas flowing in the turbine stage pressure, speed and ex- ergy transfer coefficient of variation, the pressure exergy tranfer model of water vapor that flow in turbine static blades is established in this article from characteristics of water vapor in the flow of the part of static blades in the turbine stage, based on the first and second law of thermodynamics and the theory of non-equilibrium thermodynam- ics. Also the computing methods of pressure exergy density, pressure exergy transfer coefficient are developed, and their variation trends along with the export cross-sectional area changing are included. The exergy transfer charac- teristics of static blades in steam turbine stage are analyzed from the view of exergy transfer, and it is provided the theory evidence for the pressure exergy transfer model with pressure exergy transfer potential field.

关 键 词：汽轮机静叶 (火用)传递 压(火用)势场 (火用)传递系数 

分 类 号：TK123[动力工程及工程热物理—工程热物理]