6. Physics of a Fluid, Neutral and Ionized Gases

INVESTIGATIONS OF PRESSURE PULSATIONS IN A MODEL OF DRAFT TUBE OF HYDRAULIC TURBINE CAUSED BY VORTEX RINGS

Sergey G. Skripkin
1. Kutateladze Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
skripkin.s.g@gmail.com
Mikhail A. Tsoy
1. Kutateladze Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
miketsoy@gmail.com
Sergey I. Shtork
Researcher ID: N-2634-2013
1. Kutateladze Institute of Thermophysics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
shtork@itp.nsc.ru
The material was received by the Editorial Board: 09.11.2016
Current work is devoted to experimental investigations of behavior of precessing vortex rope in a draft tube model of hydraulic turbine. We used combination of stationary and freely rotating swirlers as a hydro turbine model. Such construction provides velocity distribution on the draft tube inlet close to distribution in natural hydraulic turbines operated at non-optimal conditions. The phenomenon of precessing vortex rope reconnection with further formation of vortex ring was founded in this experimental research using high-speed visualization technique. Synchronization of highspeed visualization and pressure measurements allowed us to relate pressure shock on the draft tube wall with vortex ring moving along wall.

Keywords:
vortex ring, hydraulic turbine, precessing vortex rope, pulsations. 
УДК 532.5.032

INVESTIGATIONS OF PRESSURE PULSATIONS IN A MODEL OF DRAFT TUBE OF HYDRAULIC TURBINE CAUSED BY VORTEX RINGS
References: Skripkin S. G., Tsoy M. A., Shtork S. I., Kuibin P. A. INVESTIGATIONS OF PRESSURE PULSATIONS IN A MODEL OF DRAFT TUBE OF HYDRAULIC TURBINE CAUSED BY VORTEX RINGS. Vestnik NSU. Series: Physics. 2016, vol. 11, no. 4. P. 25–32. (in Russ.). DOI: 10.54362/1818-7919-2016-11-4-25-32