Name
Kuznetsova Yulia Anatolyevna
Scholastic degree
•
Academic rank
associated professor
Honorary rank
—
Organization, job position
Volga State University of Technology
Web site url
—
Articles count: 2
Based on the Karman vortex theory, the calculated
dependences for velocity induced by profile action in
the flow, lifting force and drag force, acting on the
profile, are determined. Calculations, performed in
MathCAD, allowed, for the given up-stream velocity,
to calculate height of mid-section of the bed-formation
profile, width of the profile along the chord, span of
the profile, angle of attack, velocity of the induced
flow. For the calculated profile parameters, the
velocity circulation value, drag force and lifting force
are determined. As the bed-formation profiles, it is
recommended to use flat plates, frame constructions
with transverse ribs in the form of arch, fish-like
symmetric or slightly curved profiles. Ways of the
profile installation in the flow, depending on the angle
of attack, are evaluated: three versions - for symmetric
profiles, and six versions - for asymmetric profiles.
Diagram of the device for the hydrosystem tailrace
protection against erosion is developed on the basis of
submerged NACA 0302 profile or profile of
Zhukovsky, made of flexible materials, including
profiles, system of supporting and regulating ropes,
and shore or bottom supports. This design is mobile,
intended for the periodic regulation of sediment yield
To study the formation of plunge basin in the
Cheboksary hydroplant, we used a scale model of the
spillway dam and all structures in the tailrace, installed
in the slot flume. When we passed the flow
corresponding to the diversion flow of the hydroplant
with a glance to the modeling scale, it was found that
the plunge basin was formed behind the end fixing of
the spillway apron. To research the dynamic facilities
of hydrosystem tailrace protection against erosion, we
used a small glass flume with a model of the roundcrested
weir. For the experiment, the water-surface
elevations were built in the flume without the weir,
and the uniform motion area was established. In
MathCAD software environment, the curve of the flow
of measuring rectangular weir of the flume was
created. Because of measurements, the curve of water
surface by the flow motion through the round-crested
weir was made. As the main criterion for modeling, the
criterion of Froude was selected. Scale of modeling of
flow parameters was determined. For testing, models
of hydrodynamic profile and sail structure with streamforming
sluice valves were built. The process of sand
washout from the flume bottom and formation of the
bottom ridges when installing the profile was
photographed. Impact of the profile on the flow and its
relation with the formation of the bottom topography
were studied. Full-scale values of geometric
parameters of the bottom ridges and their movement
velocity were established as well