TY - JOUR

T1 - Flow characterization in an axial micro-hydroturbine model

AU - Suslov, D. A.

AU - Shtork, S. I.

AU - Litvinov, I. V.

AU - Gorelikov, E. U.

N1 - Funding Information: The work including measurements of flow characteristics and data analysis was supported by the Russian Foundation for Basic Research (project No. 20-58-12012). The design and installation of the experimental setup was carried out partly within the framework of a state contract with IT SB RAS (Project No. 121031800229-1). Publisher Copyright: © 2021 Institute of Physics Publishing. All rights reserved.

PY - 2021/12/7

Y1 - 2021/12/7

N2 - The flow characteristics behind the runner of an air model of a propeller-type micro-hydroturbine were studied in detail by varying the operation conditions from part-load to high overload. The Reynolds number was varied from 3×104 to 9×104, and the swirl number from 0.7 to -0.4. An automated laser-Doppler anemometer (LDA) system for non-contact optical diagnostics was used to perform detailed measurements of the flow field distribution, including the profiles of two components of averaged velocities and pulsations and LDA signal spectra. Based on the results, a correlation was found between the identified features of the development of the flow structure under changing operating conditions of the hydroturbine and the nature of the evolution of the integral swirl number, which determines the state of the swirling flow. This can be used to develop recommendations for expanding the range of regulation of hydroturbine operation while maintaining high efficiency.

AB - The flow characteristics behind the runner of an air model of a propeller-type micro-hydroturbine were studied in detail by varying the operation conditions from part-load to high overload. The Reynolds number was varied from 3×104 to 9×104, and the swirl number from 0.7 to -0.4. An automated laser-Doppler anemometer (LDA) system for non-contact optical diagnostics was used to perform detailed measurements of the flow field distribution, including the profiles of two components of averaged velocities and pulsations and LDA signal spectra. Based on the results, a correlation was found between the identified features of the development of the flow structure under changing operating conditions of the hydroturbine and the nature of the evolution of the integral swirl number, which determines the state of the swirling flow. This can be used to develop recommendations for expanding the range of regulation of hydroturbine operation while maintaining high efficiency.

UR - http://www.scopus.com/inward/record.url?scp=85122999974&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/2127/1/012002

DO - 10.1088/1742-6596/2127/1/012002

M3 - Conference article

AN - SCOPUS:85122999974

VL - 2127

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012002

T2 - 16th International Conference Optical Methods of Flow Investigation, OMFI 2021

Y2 - 28 June 2021 through 2 July 2021

ER -