Research output: Contribution to journal › Article › peer-review
Evolution of a swirling flow in a draft tube model at transient operation regimes. / Shtork, S. I.; Suslov, D. A.; Litvinov, I. V. et al.
In: Thermophysics and Aeromechanics, Vol. 27, No. 1, 01.01.2020, p. 153-156.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Evolution of a swirling flow in a draft tube model at transient operation regimes
AU - Shtork, S. I.
AU - Suslov, D. A.
AU - Litvinov, I. V.
AU - Gorelikov, E. Yu
PY - 2020/1/1
Y1 - 2020/1/1
N2 - This work deals with the experimental study of transient flow regimes occurring in the laboratory model of a hydraulic turbine draft tube at a change in the control parameters of setup. The transition from the partial load regime, when a precessing vortex core is formed, to the best efficiency point without a core is considered. To set accurately the speed of runner rotation and the flow rate of the working medium, the setup was controlled by special software. To ensure accurate multiple reproduction of a given transition cycle between two regimes, the control program has been upgraded. Using a specially developed procedure of phase averaging of a laser Doppler anemometer (LDA) signal recorded during multiple repetitions of transient regimes, the velocity profiles were obtained for different phases of changing the setup operating conditions.
AB - This work deals with the experimental study of transient flow regimes occurring in the laboratory model of a hydraulic turbine draft tube at a change in the control parameters of setup. The transition from the partial load regime, when a precessing vortex core is formed, to the best efficiency point without a core is considered. To set accurately the speed of runner rotation and the flow rate of the working medium, the setup was controlled by special software. To ensure accurate multiple reproduction of a given transition cycle between two regimes, the control program has been upgraded. Using a specially developed procedure of phase averaging of a laser Doppler anemometer (LDA) signal recorded during multiple repetitions of transient regimes, the velocity profiles were obtained for different phases of changing the setup operating conditions.
KW - acoustic sensors
KW - draft tube
KW - laser-Doppler anemometer
KW - phase (conditional) averaging
KW - precessing vortex core
KW - transient regime
UR - http://www.scopus.com/inward/record.url?scp=85084425027&partnerID=8YFLogxK
U2 - 10.1134/S0869864320010163
DO - 10.1134/S0869864320010163
M3 - Article
AN - SCOPUS:85084425027
VL - 27
SP - 153
EP - 156
JO - Thermophysics and Aeromechanics
JF - Thermophysics and Aeromechanics
SN - 0869-8643
IS - 1
ER -
ID: 24260125