基于某超超临界汽轮机组中压切向涡流冷却研究  

Study on Tangential Vortex Flow Cooling in IP Cylinder of an Ultra-supercritical Steam Turbine

作　　者：张晓丹[1] 钟主海[1] 周帅[1] ZHANG Xiaodan;ZHONG Zhuhai;ZHOU Shuai(Dongfang Turbine Co.,Ltd.,Deyang Sichuan,618000)

机构地区：[1]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2021年第2期17-22,共6页Dongfang Turbine

摘　　要：文章基于某超超临界机组中压缸,开展切向涡流冷却技术的研究。研究初始阶段采用完整模型(包括通流部分流体域及转子部分固体域)进行共轭换热计算,了解流体域及转子内部的温度分布情况,以便指导工程设计中的转子强度校核。对比分析简化模型(不含转子固体域)能否满足下一步研究影响冷却效果因素的要求;基于简化模型进行冷却孔数量、形状、直径等对冷却效果影响规律的研究。研究发现,随着冷却孔的数量和直径增加,冷却流量增加,冷却效果增强,但同时第1级气动性能下降;等直径和放缩管在保证管内无直径突变、出口面积相同的前提下,冷却效果和对气动性能的影响基本一致。Based on the medium pressure cylinder of an ultra-superitial steam turbine,the tangential direction cooling is studied.In the initial stage of the study,the complete model(including fluid region and rotor solid region)is used to calculate the CHT and understand the temperature distribution in fluid region and solid which is instructive for rotor strength checking.It is compared and analyzed whether the simplified model(without rotor solid domain)can meet the requirements of the next step to study the factors affecting the cooling effect,and the influence law of the number,shape and diameter of the cooling holes on the cooling effect is studied based on the simplified model.It is found that the cooling flow rate increases and the cooling effect inereases with the increase of the number and diameter of cooling holes,but at the same time the first stage aerodynamic performance decreases.under the eondition of ensuring no diameter mutation and the same outlet area,the cooling effect and the influence on aerodynamic performance are basically the same.

关 键 词：超超临界 切向涡流 蒸汽冷却 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]