Please use this identifier to cite or link to this item:
|Title:||Loss analysis of a mix-flow turbine with nozzled twin-entry volute at different admissions||Authors:||Xue, Yingxian
Martinez-Botas, Ricardo F.
|Keywords:||Engineering::Mechanical engineering||Issue Date:||2018||Source:||Xue, Y., Yang, M., Martinez-Botas, R. F., Romagnoli, A., & Deng, K. (2019). Loss analysis of a mix-flow turbine with nozzled twin-entry volute at different admissions. Energy, 166, 775-788. doi:10.1016/j.energy.2018.10.075||Journal:||Energy||Abstract:||This paper investigates performance and loss mechanism of a nozzled twin-entry mix-flow turbine at different admissions. Two sets of partial admissions and unequal admissions are analysed via experimentally validated numerical method. Results show that discrepancies of turbine efficiency between symmetrical unequal admissions (swopping inlet pressure on two entries) increase when unequal admissions approach to partial admissions, although their swallowing capacity is similar. Loss breakdown of turbine shows that loss is higher in nozzle but lower in rotor when the majority of flow is fed from upper part of the component (near shroud). Opposite phenomenon happens when the majority is fed from lower part (near hub). The reason for loss characteristic of nozzle is front-sweep configuration of the nozzle vane which results in evident flow separation when the flow is fed near the shroud. The reason for loss characteristic of rotor is the tornado-shaped vortex when the flow is fed from the hub. The tornado vortex is initiated by large incidence angle near hub and developed by the combination of Coriolis force, pressure gradient and centrifugal force. The study unveils loss mechanism among different admissions for a twin-entry turbine, which may enlighten the design methodology of the turbine with twin-entry volute.||URI:||https://hdl.handle.net/10356/141025||ISSN:||0360-5442||DOI:||10.1016/j.energy.2018.10.075||Rights:||© 2018 Elsevier Ltd. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MAE Journal Articles|
Updated on Jan 28, 2023
Web of ScienceTM
Updated on Jan 25, 2023
Updated on Feb 1, 2023
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.