光热汽轮机低压进汽结构气动性能分析与优化设计  

Optimization Design and Aerodynamic Performance Analysis of Low Pressure Intake Structure for Solar Thermal Steam Turbine

作　　者：吴方松[1] 邵卫东[2,3] 李伯武 尹刚[1] 宋立明[2,3] 李军[2,3] Wu Fangsong;Shao Weidong;Li Bowu;Yin Gang;Song Liming;Li Jun(Dongfang Steam Turbine Co.,Ltd.,Deyang Sichuan,618000;Institute of Turbomachinery,Xi＇an Jiaotong University,Xi＇an Shaanxi,710049;Shaanxi Provincial Engineering Laboratory of Turbomachinery and Power Equipment,Xi＇an Shaanxi,710049)

机构地区：[1]东方汽轮机有限公司,四川德阳618000 [2]西安交通大学叶轮机械研究所,陕西西安710049 [3]陕西省叶轮机械及动力装备工程实验室,陕西西安710049

出　　处：《东方汽轮机》2018年第3期1-7,共7页Dongfang Turbine

摘　　要：为满足新能源汽轮机低压进汽系统的开发,采用数值求解三维Reynolds-Averaged Navier-Stokes(RANS)方程研究了耦合第一级的光热汽轮机低压进汽结构的气动性能,并对无叶通道进行了优化设计,同时考虑了不同蒸汽调节阀结构对低压进汽系统通流能力的影响。结果表明:原始低压进汽结构会造成较宽跨度的静叶进汽攻角和较大的进汽不均匀度,最大汽流角分布在蜗壳的左右两侧;优化的策略在于增大进汽弯管的出流面积和倾角,通过减小滞止涡来降低汽流角跨度和进汽不均匀度,这样可以有效地改善第一级静叶进口的汽流组织;随着调节阀门偏心度的增加,蒸汽阀通流能力增大,且总压损失降低。研究方法和结果为高性能光热汽轮机通流设计提供了技术支撑。In order to develop the steam admission system in low pressure cylinder for new-energy steam turbine, the aerodynamic performance of steam admission configuration coupled with the first stage is investigated by salving the Reynolds-averaged Navier- Stokes equation. The optimal design of non-vane passage is done and the influence of different steam inlet valves on steam admis- sion system is also performed. The numerical results show that the original steam admission configurations lead to wide range of at- tack angle and large non-uniformity. The largest flow inlet angle is located at the left and right sides of steam volute. The optimiza- tion strategy is to increase the area and inclinations of steam admission elbows. The stagnation vortex is weakened to improve the steam organization in blade passage. The passable capacity is increased with the eccentricity, resulting in the decrease of total pres- sure loss. Relevant results of this study are expected to support the conjugated optimization design of non-vane and blade passage as well as the steam excited vibration in steam valves.

关 键 词：光热汽轮机 低压进汽蜗壳 进汽阀 气动性能 优化设计 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]