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Research on characteristics of varying conditions for nozzle governing stage based on dimensional analysis

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  • Xu, Jian-qun
  • Ma, Lin
  • Sun, You-yuan
  • Cao, Zu-qing

Abstract

In this paper, thermodynamic calculations of nozzle governing stage are taken based on APROS (Advanced Process Simulation), and verify through the comparison of experiment table data. The influence of partial admission on pressure ratio within the governing stage is also analyzed. The results show that partial admission not only leads to partial admission losses, but also makes an impact on pressure ratio, enthalpy and reaction degree, in turn, causes the change of efficiency. Then, the nozzle pressure ratio after the full-open valve and semi-open valve respectively, is expressed as a function of flow ratio based on dimensional analysis. This paper presents a method of thermodynamic calculation for nozzle governing stage. Comparing with the results calculated through APROS and discussing the change of pressure ratio and reaction degree, it shows that the method can reflect the influence of partial admission on pressure ratio exactly, and further improve the accuracy of existing thermodynamic calculation.

Suggested Citation

  • Xu, Jian-qun & Ma, Lin & Sun, You-yuan & Cao, Zu-qing, 2014. "Research on characteristics of varying conditions for nozzle governing stage based on dimensional analysis," Energy, Elsevier, vol. 65(C), pages 590-595.
    • Handle: RePEc:eee:energy:v:65:y:2014:i:c:p:590-595
    DOI: 10.1016/j.energy.2013.11.044
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    References listed on IDEAS

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    Cited by:

    1. 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).
    2. Lei Zhang & Zongliang Qiao & Bingsen Hei & Youfei Tang & Shasha Liu, 2022. "Optimization of Steam Distribution Mode for Turbine Units Based on Governing Valve Characteristic Modeling," Energies, MDPI, vol. 15(23), pages 1-15, December.

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