超超临界二次再热高压缸流热耦合特性研究  

Investigation on Flow-Heat Coupling Characteristics of Double Reheat HP Cylinder for an USC Steam Turbine

作　　者：文柯淞 杨建道[1,2] 杨锐 史立群 李军[1] 丰镇平[1] 

机构地区：[1]西安交通大学叶轮机械研究所,西安710049 [2]上海汽轮机厂有限公司特殊透平与通流叶片研究所,上海200240

出　　处：《热力透平》2014年第2期101-106,共6页Thermal Turbine

摘　　要：为满足大型核电汽轮机高压缸的开发要求,采用耦合流动计算和共轭传热的数值方法研究了超超临界二次再热高压缸的流热耦合,给出了高压缸排汽腔室和抽汽腔室流体域的流动特性、外缸和内缸固体部件的温度场分布特性。研究结果表明:抽汽腔室进口重量流量不均匀,靠近抽汽管道的进口质量流量整体偏高;双分流波整体内缸的表面强化与排汽腔室的对流换热承受了高压缸几乎全部的温差应力,因此外缸温度场比内缸的温度场相对要更加均匀。研究结果为研发超超临界二次再热高压缸提供理论支持。The flow-heat coupling characteristics of the double reheat HP cylinder for an USC steam turbine were numerically investigated using the coupled flow calculation and conjugation heat transfer method to satisfy the development of the HP cylinder in large nuclear power steam turbines. The flow characteristics of the exhaust chamber and reheat extraction chamber, the temperature distribution of the inner and outer cylinder were given. The obtained results show that the mass flow rates of 30 extraction points were uneven and the extraction flow near the extraction pipe was bigger. The wavy outer surface enhanced the heat convection between the inner cylinder and the steam in exhaust chamber. The maximum temperature difference was observed in inner cylinder. The relevant results of this study are expected to support the development of the double reheat HP cylinder for an USC steam turbine.

关 键 词：超超临界汽轮机 高压缸 流热耦合 数值模拟 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]