TY - JOUR

T1 - Analysis of the flow structure in the model of a microhydraulic turbine

AU - Shtork, S. I.

AU - Суслов, Даниил Андреевич

AU - Litvinov, I. V.

AU - Gorelikov, E. Yu

N1 - Funding Information: The design and installation of the experimental testbed is carried out within the framework of the State Task of the Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences. Velocity distributions were measured with financial support of the Russian Foundation for Basic Research and the Government of the Novosibirsk Region (Grant No. 18-48-540033). Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/9

Y1 - 2020/9

N2 - This paper describes the results of experimental studies of a flow using the prototype of a propeller-type microhydraulic turbine. The tests are carried out on a testbed in which atmospheric air is used as a working medium. The measurements carried out with the help of a two-component laser-Doppler anemometer are used to obtain velocity distributions behind a runner in the case where the operating modes of the device change in a wide range. It is shown that the created model microhydraulic turbine has optimal parameters for the conditions set during the design, and a change in the operating mode of the device from nominal parameters to underload or overload increases the residual swirl of the flow and the generation of strong hydrodynamic instability in the form of a precessing vortex rope. In this case, axial velocity over the cross section is distributed unevenly and the flow pulsation level is increased.

AB - This paper describes the results of experimental studies of a flow using the prototype of a propeller-type microhydraulic turbine. The tests are carried out on a testbed in which atmospheric air is used as a working medium. The measurements carried out with the help of a two-component laser-Doppler anemometer are used to obtain velocity distributions behind a runner in the case where the operating modes of the device change in a wide range. It is shown that the created model microhydraulic turbine has optimal parameters for the conditions set during the design, and a change in the operating mode of the device from nominal parameters to underload or overload increases the residual swirl of the flow and the generation of strong hydrodynamic instability in the form of a precessing vortex rope. In this case, axial velocity over the cross section is distributed unevenly and the flow pulsation level is increased.

KW - experiment

KW - hydroelectric power plants

KW - laser-Doppler anemometer

KW - microhydroturbines

KW - propeller hydroturbine

KW - vortex rope precession

UR - http://www.scopus.com/inward/record.url?scp=85097069050&partnerID=8YFLogxK

U2 - 10.1134/S0021894420050156

DO - 10.1134/S0021894420050156

M3 - Article

AN - SCOPUS:85097069050

VL - 61

SP - 807

EP - 813

JO - Journal of Applied Mechanics and Technical Physics

JF - Journal of Applied Mechanics and Technical Physics

SN - 0021-8944

IS - 5

ER -