汽轮机中反动度通流技术研究  

Research on Medium Reaction Degree Flow Passage Technology for Steam Turbine

作　　者：白昆仑 孙奇[1] 平艳 尹明艳[1] 江生科[1] Bai Kunlun;Sun Qi;Ping Yan;Yin Mingyan;Jiang Shengke

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：《中国重型装备》2023年第3期34-39,共6页CHINA HEAVY EQUIPMENT

摘　　要：介绍了汽轮机中反动度通流技术的设计理念,并开展了宏观方案论证、叶型优化设计和性能分析,得到如下结论:为降低机组成本,根径减小后,反动度若降低6%,可以保证轴向排汽和静叶的适用性,仅需重新设计动叶;与原始动叶相比,新设动叶与中反动度通流方案更匹配,消除了攻角,降低了叶型损失,进而改善了流场分布,获得了更高的效率。总体来看,所研究的中反动度通流技术经济性与原始反动式通流技术相当,可以在保证效率的前提下减小根径,进而满足机组降本需求。In this paper,the design philosophy of medium reaction degree flow passage technology is introduced,the macroscopic project demonstration,blade profile design and performance are analyzed.The results show that,after reducing the root diameter in order to lower the costs of the unit,if the reaction degree is reduced by 6%to maintain the axial exhaust and vane applicability,only the movable blade needs to be redesigned.Compared with the original movable blade,the newly designed movable blade matches better the medium reaction degree flow passage scheme.It eliminates the attack angle and lowers the loss of blade profile,results in better distribution of flow field and obtains higher efficiency.In general,the medium reaction degree flow passage technology researched in this paper can achieve approximate efficiency compared with the original reaction flow passage technology.The root diameter can be reduced on the premise of maintaining the efficiency,and then meets the cost reduction requirements.

关 键 词：反动度 叶型 攻角 损失 效率 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]