汽轮机内湿蒸汽流动特性的数值模拟  

The Numerical Simulation of Wet Steam Flow Characteristics in Turbine

作　　者：肖玉广[1] 徐惠坚[2] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司,哈尔滨150046 [2]哈尔滨商业大学,哈尔滨150028

出　　处：《汽轮机技术》2010年第3期199-201,共3页Turbine Technology

摘　　要：湿度对蒸汽轮机效率的影响及其对叶片的浸蚀作用极其复杂。为了研究蒸汽凝结对流动的影响,采用商用软件CFX-5数值模拟了某大功率凝汽式汽轮机末级的定常流动。虽然定常计算所采用的混合平面法不能精确预测导叶和动叶之间的相对运动而产生的诸如湍流脉动和尾迹涡流等不稳定流动对凝结过程和水滴的生长过程的影响,但是对这一过程的近似模拟是很必要的。The effect of the wetness on steam turbine efficiency and the etching effect on the blade were very complex. For investigating the effect of steam condensation on the flow, the steady flow on large power condensing turbine last stage was numerical simulated with commercial computational software CFX -5. Although the mixing plane approach which adopted by the steady computation could not accurate predicted the effect of the turbulent fluctuation and the wake eddy that generated by the relative motion of the guide vane and the rotor blade on the condensing process and the water drop growth process, but it was necessary to simulate these process approximately.

关 键 词：汽轮机 湿蒸汽 流动特性 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]