Thermophysics and Aeromechanics
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Handling of temperature dependence of viscosity in problems of incompressible medium flow around a cylinder
Thermophysics and Aeromechanics - Tập 14 - Trang 533-559 - 2008
The viscous incompressible medium (water, air) flow past a circular cylinder is considered with regard for the temperature T dependent viscosity v. The influence of different boundary conditions for temperature on flow structure, the drag coefficient and its components due to the pressure and viscosity is investigated in the problem of the flow past a cylinder at rest for the (diameter-based) Reyn......
Analysis of the properties of heat radiation of the axisymmetric semitransparent systems with permeable boundaries
Thermophysics and Aeromechanics - Tập 15 - Trang 663-670 - 2009
Numerical analysis of hemispherical values of absorptive, transmitting, and reflective abilities of a flat layer and absorptivity of a sphere is presented in this paper depending on the optic thickness and refractive index.
The role of laboratory testing in the development of rotor aerodynamics (review)
Thermophysics and Aeromechanics - Tập 25 - Trang 1-20 - 2018
The aim of the review is to assess the value of model experimental studies for the development of classical rotor aerodynamics as well as to describe the most significant recent results stimulated by intense development of wind power.
Mathematical modelling of damp porous material drying in diffusion approximation
Thermophysics and Aeromechanics - Tập 15 - Trang 643-650 - 2009
The problem of drying a porous permeable material is considered. Self-similar solutions are derived for the process of the moisture diffusion transport. The dependence of drying intensity on the porous medium initial state as well as on the parameters of external effect is investigated.
Development and application of the laser Doppler anemometer with direct spectral analysis for studying high-velocity multiphase flows
Thermophysics and Aeromechanics - Tập 27 - Trang 555-563 - 2020
The present study is aimed at the development of a laser Doppler anemometer (LDA) for investigating high-velocity multiphase flows. Based on the analysis of the Doppler anemometry methods, requirements to modern LDAs for solving the above-mentioned problems are formulated, and the ways of their implementation with allowance for the present status of laser engineering and spectroscopy are outlined.......
On similarity criteria at the experimental modeling of the flying vehicles motion with the aid of small-scale models
Thermophysics and Aeromechanics - Tập 24 - Trang 1-6 - 2017
The equations of the longitudinal motion of flying vehicles at their steady and unsteady motion are considered. The nondimensionalization of equations has been carried out, and the similarity criteria have been obtained. The capabilities of the experimental modeling of the unsteady motion of flying vehicles are illustrated with the aid of small-scale models.
Experimental study of momentum transfer in a cellular flame of rich and lean propane-butane/air mixture
Thermophysics and Aeromechanics - Tập 27 - Trang 409-416 - 2020
To simulate a cellular flame, rich (equivalent ratio Φ = 1.4) and lean (Φ = 0.9) propane-butane/air mixtures were used in a burner, which forms a stationary flame with a single cell. Experimental data on the temperature fields were obtained using the coherent anti-Stokes Raman scattering (CARS) method; the velocity components were measured using PIV (Particle Image Velocimetry) equipment. The term......
Reduction of noxious substance emissions at the pulverized fuel combustion in the combustor of the BKZ-160 boiler of the Almaty heat electropower station using the “Overfire Air” technology
Thermophysics and Aeromechanics - Tập 23 - Trang 125-134 - 2016
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 NO
x
and minimizing the energy losses. The results of numeric......
Evolution of turbulent kinetic energy in a perturbed turbulent boundary layer
Thermophysics and Aeromechanics - Tập 18 - Trang 497-500 - 2012
The paper considers the evolution of turbulent kinetic energy in a turbulent boundary layer perturbed by suction. The results show that the boundary layer equilibrium is altered in a non-linear manner due to suppression of the structures near the wall. The behavior, however, suggests that the wavelength of alteration of the equilibrium of the layer is unaffected by a change in Reynolds number and ......
75th Anniversary of Eduard P. Volchkov
Thermophysics and Aeromechanics - Tập 19 - Trang 349-350 - 2012
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