Design of 1 + 1 / 2 counter rotating centrifugal turbine and performance comparison with two-stage centrifugal turbine

Dan Luo, Xiaojing Sun and Diangui Huang

Energy, 2020, vol. 211, issue C

Abstract: The counter-rotating turbine technology is one of the potential technical measures to improve the performance of aero-engine. Inspired by axial-flow counter-rotating turbine, this paper applied the counter-rotating turbine technology to the centrifugal turbine and carried out the aerodynamic design of the 1 + 1/2 counter-rotating centrifugal turbine stage by theoretical analysis using the air ideal gas as the working fluid. Then the blade profile of 1 + 1/2 counter-rotating centrifugal turbine was designed based on the velocity triangle obtained from theoretical analysis. At last, 1 + 1/2 counter-rotating centrifugal turbine was numerically analyzed and compared with the two-stage co-rotating centrifugal turbine under the same thermal parameters. The results show that the 1 + 1/2 counter-rotating centrifugal turbine has 12.0% less maximum diameter and 1.57% higher efficiency than the two-stage co-rotating centrifugal turbine.

Keywords: Centrifugal turbine; Counter-rotating turbine; Blade profile design; Numerical simulation (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:211:y:2020:i:c:s0360544220317369

DOI: 10.1016/j.energy.2020.118628

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