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2016 year, number 1
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S.V. Alekseenko1, 2, V.Yu. Borodulin1, N.A. Gnatus3, M.I. Nizovtsev1, and  N.N. Smirnova4
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Tomsk Polytechnic University, Tomsk, Russia
3NPK PETROTES JSC, Moscow, Russia
4NMSU “Gorny” (Mining University), St. Petersburg, Russia
E-mail: aleks@itp.nsc.ru, nizovtsev@itp.nsc.ru
Keywords: geothermal energy, petrothermal power engineering, hydrothermal resources, Geo power plant
Pages: 1–16
Abstract >>
A review is given for
the state of the art and future development of the geothermal
power engineering. Different diagrams of GeoPP are shown for different levels
of geofluid temperature. A special focus is made on challenges for
petrothermal power production. The huge amount of heat from petrothermal
resources can be harnessed through creating geothermal circulation systems
within the dry rocks. Estimates for system lifetime and heat production
capacity of circulation systems are given for different flow rates of
coolant.
DOI: 10.1134/S0869864316010017
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G.V. Kuznetsov, D.V. Feoktistov, and E.G. Orlova
Tomsk Polytechnic University, Tomsk, Russia
E-mail: enja199105@gmail.com
Keywords: contact spot diameter, contact angle, specific evaporation rate, pinning mode, spreading mode
Pages: 17–22
Abstract >>
The results of study of evaporation of water droplets
and NaCl salt solution from
a solid substrate made of anodized aluminum are presented in this paper.
The experiment provides the parameters describing the droplet
profile: contact spot diameter, contact angle, and droplet
height. The specific rate of evaporation was calculated from
the experimental data. The water droplets or brine droplets with
concentration up to 9.1 % demonstrate evaporation with the pinning mode for the contact
line. When the salt concentration in the brine is taken up
to 16.7 %, the droplet spreading mode was observed. Two stages
of droplet evaporation are distinguished as a function of phase transition
rate.
DOI: 10.1134/S0869864316010029
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M.S. Makarov and S.N. Makarova
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mail: snmakarova@itp.nsc.ru
Keywords: heat and mass transfer, boundary layer, adiabatic evaporation, binary solution
Pages: 23–32
Abstract >>
Results of numerical
simulation of heat and mass transfer in a laminar flow of three-component
gas at adiabatic evaporation of binary solutions from a flat plate are
presented. The studies were carried out for the perfect solution
of ethanol/methanol and zeotrope solutions of water/acetone, benzene/acetone,
and ethanol/acetone. The liquid-vapor equilibrium
is described by the Raoult law for the ideal solution and
Carlson–Colburn model for real solutions. The effect of gas temperature and liquid composition
on the heat and diffusion flows, and temperature of vapor-gas mixture
at the interface is analyzed. The formula for calculating
the temperature of the evaporation surface for the binary liquid
mixtures using the similarity of heat and mass transfer was proposed. Data
of numerical simulations are in a good agreement with the results of
calculations based on the proposed dependence for all examined liquid
mixtures in the considered range of temperatures and pressures.
DOI: 10.1134/S0869864316010030
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A. Guelailia,
A. Khorsi, and M.K. Hamidou
University of Sciences and Technologies, Oran, Algeria
E-mail: guelailia@yahoo.fr
Keywords: gas turbine blade, film cooling efficiency, numerical simulation, mass flow rate, cylindrical and converging slot holes
Pages: 33–42
Abstract >>
The aim of this study is
to investigate the effect of mass flow rate on film cooling effectiveness
and heat transfer over a gas turbine rotor blade with three staggered rows
of shower-head holes which are inclined at 30° to the spanwise direction,
and are normal to the streamwise direction on the blade. To improve
film cooling effectiveness, the standard cylindrical
holes, located on the leading edge region, are replaced with
the converging slot holes (console). The ANSYS CFX has been
used for this computational simulation.
The turbulence is approximated by a k-e model. Detailed film effectiveness distributions
are presented for different mass flow rate. The numerical results are
compared with experimental data.
DOI: 10.1134/S0869864316010042
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A.V. Vaganov1, Yu.G. Ermolaev2, G.L. Kolosov2, A.D. Kosinov2, 3, A.V. Panina2, N.V. Semionov2, and  A.A. Yatskikh2,3
1Central Aerohydrodynamic Institute, Zhukovskii, Moscow Region, Russia
2Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Â Novosibirsk, Russia
3Novosibirsk State University, Novosibirsk, Russia
E-mail: kosinov@itam.nsc.ru
Keywords: supersonic velocities, experimental studies, wind tunnel, flat plate, sharp and blunt leading edges, boundary layer, hot-wire anemometry
Pages: 43–48
Abstract >>
Results of an
experimental study of the excitation of high-intensity disturbances by a weak
external shock wave in laminar boundary layer on flat-plate models with sharp
and blunted leading edges at Ì = 2.5 are reported. The field of disturbances produced by a 2D sticker
in turbulent boundary layer on the wall of wind-tunnel test section in the free
stream is shown to have the form of an
N-wave. It is found that, on the blunted plate, the intensity of pulsations
produced by weak external shock waves in boundary layer several times exceeds
the intensity of pulsations produced in boundary layer on the model with a
sharp leading edge.
DOI: 10.1134/S0869864316010054
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I.I. Mazhul1,2, V.F. Volkov1, V.I. Zvegintsev1, and I.V. Ivanov3
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
3Open Joint-stock Company “Splav”, Tula, Russia
E-mail: mazhul@itam.nsc.ru
Keywords: supersonic velocities, numerical simulation, axisymmetric finned configuration, deflection of control surfaces, flow pattern, aerodynamic characteristics
Pages: 49–58
Abstract >>
A possible influence of the deflection of control surfaces on the aerodynamics of an axisymmetric slender configuration at supersonic flow speeds is considered. A classical configuration consisting from the fuselage in the form of a body of revolution and having cross frontal fins and six-blade trailing stabilizers is considered as the investigation object. The physical flow pattern at the deflection of horizontal fin consoles is investigated and the estimates are obtained for the influence of this deflection on both the characteristics of elements (the body and stabilizers) as well as on the integral aerodynamic characteristics of the entire configuration. Numerical computations of the flow have been done at the freestream Mach number Ì = 3 in the range of attack angles α = 0-10° and the angles of the control surfaces deflection δcs = ±5° on the basis of the averaged Navier-Stokes equations and the SST k-ω turbulence model.
DOI: 10.1134/S0869864316010066
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O.F. Voropaeva and G.G. Chernykh
Institute of Computational Technologies SB RAS, Novosibirsk, Russia
Novosibirsk State University, Novosibirsk, Russia
E-mail: vorop@ict.nsc.ru, chernykh@ict.nsc.ru
Keywords: momentumless turbulent wake, internal waves, shear flow, stratified media, numerical modeling
Pages: 59–68
Abstract >>
The numerical model of
momentumless turbulent wake in a horizontally homogeneous shear flow of
linearly stratified medium has been constructed. Based on this model,
the investigation of the wake dynamics has been performed. The obtained data demonstrate
the transformation of the zone of turbulent perturbations and
internal waves generated by the wake under the action of shear flow,
which leads to the deceleration of turbulence decay at large time values
after the body passage.
DOI: 10.1134/S0869864316010078
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K. Yongsiri1, C. Thianpong1, K. Nanan2, and S. Eiamsa-ard3
1King Mongkut’s Institute of Technology, Bangkok, Thailand
2Phetchaburi Rajabhat University, Phetchaburi, Thailand
3Mahanakorn University of Technology, Bangkok, Thailand
E-mails: siri.kittisak@gmail.com, cthianpong@hotmail.com, kwanchai@mut.ac.th, smith@mut.ac.th
Keywords: heat transfer enhancement, heat exchanger, helically twisted tape, helical tape, turbulence
Pages: 69–81
Abstract >>
This article presents an investigation on heat transfer enhancement in a round tube inserted with a helically twisted tape. The effects of a helically twisted tape with alternate axis (HTT-A) on heat transfer, friction factor, and thermal performance factor behaviours are reported for the turbulent regime. HTT-A geometries are tape pitch to tube diameter, P/D = 1.0, 1.5, and 2.0; alternate length to pitch length, l/P = 1.0, 1.5, and 2.0; twisted length to tape width, y/W = 3.0; and tape width to tube diameter, w/D
= 0.2. The experiment has been performed by varying the volumetric air flow rate in order to adjust Reynolds number ranging from 6 000 to 20 000. The wall of the testing tube is uniformly heated as a constant heat flux while the tests are covered with thermal insulations to reduce heat loss to surroundings. Thermal performance is evaluated by comparing the present experimental results with the results of the modified HTT-A and also those obtained from previous study (conventional helically twisted tape, HTT). The thermal performance of tested tube with HTT-A is evaluated to obtain the degree of heat transfer enhancement and friction factor induced by HTT-A with respect to the plain tube under the same test conditions. Evenly, it is interesting to observe that the tube with HTT-A consistently possesses higher heat transfer and thermal performance factor than those with the HTT around 14.1% and 1.9%, respectively. The HTT-A with the smaller pitch ratio and adjacent twist length provides higher heat transfer rate and friction factor than the one with larger pitch ratio and alternate length as a result of a larger contact surface area, stronger swirl intensity and, thus, better fluid mixing near the tube wall. In the range determined, the tubes with the largest pitch ratio (P/D
= 2.0) and smallest alternate length (l/P = 1.0) give the highest thermal performance factor
at around 1.35. In
addition, the empirical correlations of the Nusselt number, friction
factor, and thermal performance factor are also described.
DOI: 10.1134/S086986431601008X
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O.B. Bocharov and D.Yu. Kushnir
JSC “Baker Hughes”, Novosibirsk, Russia
E-mail: Oleg.Bocharov@bakerhughes.com, Dmitry.Kushnir@bakerhughes.com
Keywords: power-law fluid, flow around sphere, wall-bounded flow, the lift force, the drag force, numerical simulation
Pages: 83–95
Abstract >>
The analysis and evaluation of the forces acting on
the particle in a linear shear flow of power-law fluid (PLF) in the presence of the wall were performed. Using the
results of a series of computations for a model problem with a spherical particle near a flat wall in the Reynolds number range of 0-200 and the distance to the wall from 0 to 20
particle diameters, the correlation formulas for calculating the coefficients
of drag force and lift force were obtained. Special attention was paid to the
behavior of the forces acting on the particle approaching the wall.
DOI: 10.1134/S0869864316010091
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N. Kishan1 and S. Jagadha2
1Osmania University, Hyderabad-7, Telangana State, India
2St. Martin’s Engineering college, Dhullapally, Secunderabad, India
E-mail: kishan_n@rediffmail.com; jagadhasaravanan@gmail.com
Keywords: MHD, non-Darcy porous medium, mixed convection, thermal radiation, thermophoresis, implicit finite difference scheme
Pages: 97–108
Abstract >>
The paper presents an investigation of the influence of thermophoresis on MHD mixed convective heat and mass transfer of a viscous, incompressible and electrically conducting fluid along a vertical flat plate with radiation effects. The plate is permeable and embedded in a porous medium. To describe the deviation from the Darcy model the Forchheimer flow model is used. The Rosseland approximation is used to describe the radiative heat flux in the energy equation. The governing partial differential equations are transformed into a system of ordinary differential equations using similarity transformation. The nonlinear ordinary differential equations are linearized by using quasi-linearization technique and then solved numerically by using implicit finite difference scheme. The numerical results are analyzed for the effects of various physical parameters such as magnetic parameter Ha, mixed convection parameter Rad /Ped, Reynolds number Red, radiation parameter R, thermophoretic parameter τ, Prandtl number Pr, and
Schmidt number Sc. The heat transfer coefficient is also tabulated for
different values of physical parameters.
DOI: 10.1134/S0869864316010108
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S.D. Sleptsov1, N.A. Rubtsov1, and N.A. Savvinova2
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2North-Eastern Federal University, Yakutsk, Russia
E-mail: sleptsov@itp.nsc.ru
Keywords: radiant-conductive heat transfer, Stefan problem, selectivity, emissivity, heat removal
Pages: 109–117
Abstract >>
The thermal state of
a translucent selectively absorbing medium was studied by the methods
of numerical simulation at different values of the optical properties of
boundaries and heat transfer from the left surface in approximation of
one-phase Stefan problem. The temperature fields and densities of
resultant radiation fluxes as well as the thermal state of the left
boundary and dynamics of layer reduction in the melting process were
analyzed. The processes of phase transition in a flat layer of
selective and gray absorbing media and emitting media were compared, and their
fundamental differences were shown.
DOI: 10.1134/S086986431601011X
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G.G. Volokitin1, N.K. Skripnikova1, V.A. Sinitsyn2, O.G. Volokitin1, V.V. Shekhovtsov1, S.P. Vaschenko3, and  V.I. Kuz’min3
1Tomsk State University of Architecture and Building, Tomsk, Russia
2Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
3Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: volokitin_oleg@mail.ru
Keywords: electroplasma setup, wood surface treatment, protective-decorative coating, temperature field
Pages: 119–124
Abstract >>
Plasma technology was developed to create
protective-decorative coatings on the wood surfaces. Experimental investigation on applying the protective
coating using the low-temperature plasma energy as well as studies of the distribution of
temperature fields over the section of the treated workpiece have
been carried out, and the calculated results have been compared with
the experimental data.
DOI: 10.1134/S0869864316010121
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A.S. Askarova1, V.E. Messerle2, A.B. Ustimenko3, S.A. Bolegenova1, S.A. Bolegenova1, V.Yu. Maximov1, and  A.B. Yergalieva1
1Al-Farabi Kazakh National University, Almaty, Kazakhstan
2Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
3Scientific Research Institute of Experimental and Theoretical Physics, Almaty, Kazakhstan
E-mail: aliya.askarova@kaznu.kz, maximov.v@mail.ru
Keywords: heat and mass transfer, combustion, overfire air, computational experiment
Pages: 125–134
Abstract >>
The computational experiments using the “Overfire Air” (OFA) technology at the coal dust torch combustion in the combustor of the BKZ-160 boiler of the heat power plant No. 2 in Almaty have been conducted. The results show a possibility of reaching a reduction of the emission of noxious nitrogen oxides NOx and minimizing the energy losses. The results
of numerical experiments on the influence of the additional air supply on
the main characteristics of heat and mass transfer are presented. A
comparison with the base regime of the solid fuel combustion when there is no
supply of the additional air (OFA = 0 %) has been made.
DOI: 10.1134/S086986431601013
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S.G. Komarov and S.V. Stankus
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mail: stankus@itp.nsc.ru
Keywords: speed of sound, refrigerant R-407C, vapor, liquid, method of ultrasonic interferometer
Pages: 135–137
Abstract >>
The speed of sound in liquid
and gaseous refrigerant R-407C
was measured by the method of ultrasonic interferometer in the temperature
range from 293 to 373 K and pressure from 0.05 to 0.5 to 3.7 MPa. The experimental uncertainties of the temperature,
pressure, and speed of sound measurements were estimated to be within ±20 mK, ±4 kPa, and ±(0.1–0.3) %, respectively. The obtained results are
compared with the calculated speed of sound from the fundamental state equation for the Helmholtz free
energy.
DOI: 10.1134/S0869864316010145
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V.N. Mamonov, A.D.
Nazarov, A.F. Serov, and V.I. Terekhov
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mail: mamonovvn@mail.ru
Keywords: Couette ring system, coaxial cylinders, counter rotation, heat generator, dissipation
Pages: 139–142
Abstract >>
The effect of parameters of the multi-ring
Couette system with counter rotating coaxial cylinders on the process
of thermal energy release in a viscous liquid filling this system is
considered with regard to the problem of determining the possibility
of creating the high-performance wind heat generator.
The multi-cylinder rotor design allows directly conversion of the mechanical
power of a device consisting of two “rotor” wind turbines with
a common axis normal to the air flow into the thermal energy in
a wide range of rotational speed of the cylinders. Experimental
results on the measurement of thermal power released in the pilot
heat generator at different relative angular speeds of cylinder rotation are
presented.
DOI: 10.1134/S0869864316010157
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A.F. Latypov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
E-mail: latypov@itam.nsc.ru
Keywords: gas flow, heat supply/removal, dissipation, exergy
Pages: 143–145
Abstract >>
A
formula for evaluating the gas-flow exergy at heat supply/removal without
concretization of the process and the way in which the dissipation of
kinetic energy proceeds is reported.
DOI: 10.1134/S0869864316010169
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Editorial Board
Siberian Branch of the RAS, Novosibirsk, Russia
Pages: 147–148
Abstract >>
January
28, 2016 is the 100th anniversary of the birth of the outstanding researcher in
the field of power engineering, thermophysics and thermodynamics, great
scientist and brilliant organizer Academician Ivan I. Novikov (15(28) January
1916-30 May 2014). Results of his fundamental research
are widely known in our country and abroad at the level of discoveries and
inventions.
DOI: 10.1134/S0869864316010170
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