高效宽负荷汽轮机通流气动技术研究  

Aerodynamic Study on Steam Flow Path of High Efficiency and Wide Load Steam Turbine

作　　者：杜小琴[1] 王建录[1] 袁永强[1] 范小平[1] 邓国梁[1] 刘勐 Du Xiaoqin, Wang Jianlu, Yuan Yongqiang, Fan Xiaoping, Deng Guoliang, Liu Meng(Dongfang Turbine Co., Ltd., Deyang Sichuan, 61800)

机构地区：[1]东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2018年第2期18-22,28,共6页Dongfang Turbine

基　　金：国家科技支撑计划"1 000 MW高效宽负荷率的超超临界机组开发与应用"(2015BAA03B01)

摘　　要：文章针对高效宽负荷汽轮机中的通流气动技术进行了研究,包括高中压亚音速叶型设计、低压超音速叶片优化和低压排汽缸气动优化。亚音速叶型设计的主要目的是提高其宽负荷性,对新设叶型进行了叶栅试验和多级透平试验,新设的亚音速叶型不仅能量损失得到了降低,且攻角适应性更好;优化末级动静之间的匹配参数、静叶流型和弯曲规律及动叶型线的扭转规律,并对末级变工况性能进行分析,末级收益达到了预期收益效果;对低压排汽缸汽流的流动机理进行了深入分析,以削弱或消除通道涡为目的对排汽缸进行优化,极大程度改善了排汽缸的性能。This paper described the aerodynamic study on the steam flow path of the high efficiency and wide load steam turbine,including subsonic blade design of HP/IP, supersonic blade optimization of LP, and aerodynamic optimization of the exhaust hood.The main purpose of subsonic blade design was to improve the wide load range, and the new profiles were investigated using the linear and annular cascades tests and multi-stage turbine test. The experiment results showed that the new profiles not only got less energy loss, but also had better adaptation on incidence angle. The optimization of matching parameter between the last stator and the last rotor, the distortion and the vortexing of the last stator, and the distortion of the last rotor were carried out. The last stage off-design performances were also analyzed, and the results reached the expected return. The flow mechanism of exhaust hood was deeply analyzed, the optimization was carried out to weak or eliminate the passage vortex, which greatly improve the performance of the exhaust hood.

关 键 词：高效宽负荷 亚音速叶型 超音速叶片 排汽缸 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]