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The influence of nozzle chamber structure and partial-arc admission on the erosion characteristics of solid particles in the control stage of a supercritical steam turbine

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  • Cai, Liu-xi
  • Wang, Shun-sen
  • Mao, Jing-ru
  • Di, Juan
  • Feng, Zhen-ping

Abstract

Reducing solid particle erosion of blades is one of the most urgent problems for supercritical steam turbine power generation technology. Based on the erosion rate models and the particle rebound models of blade materials obtained through accelerated erosion test under high temperature, systematic numerical simulations of the complex steam-particle flow in high pressure inlet flow channel and governing stage cascade of a supercritical steam turbine with four control valves was performed in this paper. The influence the typical nozzle chamber structure and partial-arc admission on the erosion characteristics of control stage blades was first investigated. Results show that erosion condition of nozzles in the same nozzle segment vary greatly along circumferential direction, while erosion damage to the leading edge of different circumferential rotating blades is uniform. Compared with four-valve opening condition, erosion weight-loss of the whole nozzle segment increases by 14% and 25% under three-valve opening condition and two-valve opening condition, respectively. Besides, under the partial-arc admission conditions, some large particles coming from the steam admission nozzle segment will collide back and forth between vanes and rotating blades in the downstream nozzle segment without steam admission, thus causing certain erosion to the trailing edge of nozzle suction side.

Suggested Citation

  • Cai, Liu-xi & Wang, Shun-sen & Mao, Jing-ru & Di, Juan & Feng, Zhen-ping, 2015. "The influence of nozzle chamber structure and partial-arc admission on the erosion characteristics of solid particles in the control stage of a supercritical steam turbine," Energy, Elsevier, vol. 82(C), pages 341-352.
    • Handle: RePEc:eee:energy:v:82:y:2015:i:c:p:341-352
    DOI: 10.1016/j.energy.2015.01.044
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    References listed on IDEAS

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    1. Padhy, M.K. & Saini, R.P., 2012. "Study of silt erosion mechanism in Pelton turbine buckets," Energy, Elsevier, vol. 39(1), pages 286-293.
    2. Li, Yuanyuan & Zhou, Luyao & Xu, Gang & Fang, Yaxiong & Zhao, Shifei & Yang, Yongping, 2014. "Thermodynamic analysis and optimization of a double reheat system in an ultra-supercritical power plant," Energy, Elsevier, vol. 74(C), pages 202-214.
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    Cited by:

    1. Cai, Liuxi & Xiao, Junfeng & Wang, Shunsen & Gao, Song & Duan, Jingyao & Mao, Jingru, 2017. "Gas-particle flows and erosion characteristic of large capacity dry top gas pressure recovery turbine," Energy, Elsevier, vol. 120(C), pages 498-506.
    2. Yu, Jianxi & Liu, Pei & Li, Zheng, 2020. "Hybrid modelling and digital twin development of a steam turbine control stage for online performance monitoring," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    3. Cao, Li-hua & Liu, Shuang & Li, Yan-chao & Si, He-yong, 2020. "Influence of valve governing mode on solid particle erosion and efficiency in governing stage of steam turbine," Energy, Elsevier, vol. 191(C).
    4. Yamamoto, Satoru & Uemura, Akihiro & Miyazawa, Hironori & Furusawa, Takashi & Yonezawa, Koichi & Umezawa, Shuichi & Ohmori, Shuichi & Suzuki, Takeshi, 2020. "A numerical and analytical coupling method for predicting the performance of intermediate-pressure steam turbines in operation," Energy, Elsevier, vol. 198(C).
    5. Hu, Pengfei & Cao, Lihua & Su, Jingkai & Li, Qi & Li, Yong, 2020. "Distribution characteristics of salt-out particles in steam turbine stage," Energy, Elsevier, vol. 192(C).

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