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research-article

Research on a Transonic Supercritical Carbon Dioxide Centrifugal Turbine

[+] Author and Article Information
Zehai Yang

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
18301926132@163.com

Dan Luo

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
1506489117@qq.com

Diangui Huang

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
dghuang@usst.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4043295 History: Received August 13, 2018; Revised March 18, 2019

Abstract

Recently, the supercritical carbon dioxide Brayton cycle gained a lot of attention for its application to next generation nuclear reactors. Turbine is the key component of the energy conversion in the thermodynamic cycle. Transonic centrifugal turbine has advantages of compatibility of aerodynamic and geometric, low cost, high power density and high efficiency, therefore, it has opportunity to become the main energy conversion equipment in the future. In this paper, a transonic nozzle and its corresponding rotor cascade of the single-stage centrifugal turbine were designed. In addition, the three-dimensional numerical simulation and performance analysis were conducted. The numerical simulation results show that the predicted flow field is as expected and the aerodynamic parameters are in good agreement with one-dimensional design. Meanwhile the off-design performance analysis shows that the transonic centrifugal turbine stage has wide stable operation range and strong load adaptability. Therefore, it can be concluded that the proposed turbine blade has good performance characteristics.

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