https://doi.org/10.1140/epjp/s13360-024-05479-3
Regular Article
Performance of Heron turbine with various nozzles and blockage effects
1
Center of Computational Energy, Department of Mechanical Engineering, Hakim Sabzevari University, Sabzevar, Iran
2
Department of Mechanical Engineering, Andong National University, Andong, South Korea
a
es.lakzian@pyunji.andong.ac.kr
Received:
29
March
2024
Accepted:
21
July
2024
Published online:
10
August
2024
Because nozzles are essential to many scientific and industrial processes, optimizing them is a major focus for researchers looking to improve industrial equipment performance. In order to understand the effects of flow conditions and nozzle design, this article first provides a thorough analysis of the Heron turbine’s performance. Based on this, two nozzles with two different area ratios, four different inlet pressures, and four different orifices were taken into consideration for blockages and nozzles. This allowed them to better examine and compare the various Heron turbine geometries. Subsequently, five critical metrics were specifically considered at the nozzle output under different nozzle and blockage conditions: thrust coefficient, power coefficient, torque, rpm, and entropy. Reducing entropy and increasing thrust coefficient, power coefficient, torque, and rpm at the nozzle exit are the main goals of the research. Moreover, the research delves into exploring different geometries to ensure smooth flow transitions from over-expanded to under-expanded conditions, which is vital for optimizing the efficiency of the Heron turbine. The optimization process is finally conducted using the TOPSIS software, considering the optimal state with the lowest entropy and the highest thrust and power coefficients at the nozzle outlet. The results identify case 2-A-III as the optimal configuration that achieves an increase in thrust coefficient of 35%, a power coefficient of 65%, and an entropy reduction of 96% compared to the baseline, providing valuable insights for the design and performance improvement of the Heron turbine.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
