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Thermophysics and Aeromechanics

2006 year, number 2

Characteristics of the AT-303 hypersonic wind tunnel. Part 2. Aerodynamics of the HB-2 reference model

N.P. Adamov, L.G. Vasenev, V.I. Zvegintsev, I.I. Mazhul, D.G. Nalivaichenko, A.V. Novikov, A.M. Kharitonov, and S.I. Shpak
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 157-171

Abstract >>
Aerodynamic coefficients of the HB-2 AGARD reference model measured in a new AT-303 hypersonic wind tunnel with adiabatic compression are presented. The experiments are performed in the ranges of Mach numbers

Nonlinear effects of pulsed periodic energy supply on shock wave structure of transonic flow around airfoils

S.M. Aulchenko, V.P. Zamuraev, and A.P. Kalinina
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 173-181

Abstract >>
The work deals with an investigation of possibilities of controlling the aerodynamic characteristics of airfoils with the aid of external local pulsed-periodic energy supply at transonic flight regimes. The alteration of flow structure near a symmetric airfoil and its wave drag has been studied on the basis of a numerical solution of two-dimensional nonstationary gas dynamics equations versus the energy supply period, the localization and shape of the energy supply zone. The energy supply upstream of the closing shock in the immediate proximity of the contour in the zones extended along it is found to result in a considerable reduction of the profile wave drag. The nature of such a drag reduction is elucidated. The existence of a limiting frequency of energy supply is established.

Distributed two-dimensional boundary-layer receptivity to non-stationary vortical disturbances in the presence of surface roughness

V.I. Borodulin, A.V. Ivanov, Y.S. Kachanov, and V.Yu. Komarova
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 183-208

Abstract >>
The distributed (over the longitudinal coordinate) excitation of two-dimensional (2D) Tollmien

Interaction of Tollmien

G.V. Petrov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 209-212

Abstract >>
The computations of nonlinear development of pairs of oblique Tollmien ? Schlichting waves in a boundary layer on a plate are carried out for M = 2 using the non-local (parabolized) stability equations. Besides such waves, a harmonic engendered by them is involved in the interaction.

Hot-wire visualization of breakdown to turbulence in complex flows

V.G. Chernoray1, V.V. Kozlov1, L. Loefdahl2, and P.R. Pratt3
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Chalmers University of Technology, Applied Mechanics, Goeteborg, Sweden
3The Queen
Pages: 213-220

Abstract >>
The nonlinear stage of breakdown to turbulence is a strongly three-dimensional process and represents a difficult task for experimental studies. Investigation of laminar-turbulent transition in aerospace applications additionally involves a complex base-flow with pressure gradients and secondary velocity components resulting in successive increase of necessary measurements. The developed hot-wire visualization technique offers a possibility for an advanced analysis whilst retaining the advantages of traditional visualization methods and is especially suitable for resolving such complex flows.

Numerical modelling of free interaction of shock waves in corner flows

Yu.P. Goonko and A.N. Kudryavtsev
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 221-237

Abstract >>
The inviscid supersonic flows in corners between intersecting compression wedges were studied numerically. Under usual conditions, the flows in such corner configurations are conically self-similar. Besides, shock waves formed by wedges are plane and they interact with one another in these flows and the downstream development of the shock interaction structure at that occurs in a region which is bounded in cross-sectional directions by the walls and contracts towards the corner rib, and in this sense the above interaction of shocks may be subjected to influence of the rib. The corner flows of another type with an interaction of shocks not subjected to the

Direct statistical Monte Carlo simulation of the shock-wave structure in dissociating gas

Ye.A. Bondar, S.F. Gimelshein, G.N. Markelov, and M.S. Ivanov
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Pages: 239-256

Abstract >>
The applicability of a new model in terms of the description of real gas effects in the Direct Simulation Monte Carlo method is analysed. The model is used in a numerical study of the internal structure of the front of a strong shock wave and relaxation zone behind the front for conditions corresponding to spacecraft entry into the Martian atmosphere. The influence of the free-stream parameters on relaxation of various energy modes of molecules in the wave front and in the relaxation region is considered. The effect of chemical reactions on the flow structure is studied. A detailed analysis of flow nonequilibrium is performed at the level of the velocity distribution function and population of rotational and vibrational levels of molecules.

Numerical simulation of thermal-physical processes accompanying multisilicon crystal growing by the method of Bridgman

V.S. Berdnikov1, M.V. Filippova1, B.A. Krasin2, and A.I. Nepomnyashchikh2
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Vinogradov Institute of Geochemistry SB RAS, Irkutsk, Russia
Pages: 257-274

Abstract >>
Conjugate heat transfer was studied numerically at multisilicon production from flat-bottom crucible using a vertical version of the Bridgman

Hydrate formation kinetics in piped natural-gas flows

N.G. Musakaev1, R.R. Urazov2, and V.Sh. Shagapov2
1Tyumen Department of Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Tyumen, Russia
2Sterlitamak State Pedagogical Academy, Sterlitamak, Russia
Pages: 275-281

Abstract >>
In this work, equations and methods of multiphase media mechanics were used to simulate the hydrodynamic, thermophysical, and heat- and mass-transfer processes in natural-gas flow through a horizontal pipe with allowance for gas-hydrate deposition onto the inner pipe wall. The influence of several factors on the hydrate formation process was numerically examined.

Optimization of steam-turbine power unit of a coal mini-HPP with variable schedule of heat and electric energy loads

A.M. Kler1, A.Yu. Marinchenko1, And S.N. Sushko2
1Melentiev Energy Systems Institute SB RAS, Irkutsk, Russia
62Irkutsk State Technical University, Irkutsk, Russia
Pages: 283-293

Abstract >>
The technique for optimization of parameters of a power unit of a gas-turbine small-size heat and power plant was developed with regard for seasonable nature of heat and electric energy loads; the approach uses linear versions of dependency of outlet parameters on the inlet parameters. A mathematical model of the energy unit of a mini-HPP was developed. Optimization calculations for a coal gas-turbine mini-HPP were carried out for several optimization criteria: minimal revenue from the produced heat and electric energy (at different levels of fuel price), minimum of fuel consumption during year, and minimal investment at a given internal return rate.

Selective diagnostics of combustion processes in multi-burner boilers

S.M. Borzov1, V.V. Garkusha2, V.I. Kozik1, V.P. Mikheev3, O.I. Potaturkin1, and N.N. Shushkov1
1Institute of Automation and Electrometry SB RAS, Novosibirsk, Russia
2Design Technological Institute of Digital Technique SB RAS, Novosibirsk, Russia
3State Unitary Enterprise
Pages: 303-308

Abstract >>
The process of gas hydrocarbon combustion was tested in real (industrial) conditions on boilers with many burners. For key operation modes, the main regularities of emission from single flames were studied. The system of remote diagnostics was developed; it is suitable for selective monitoring of a single burner in the multi-burner configuration and supplies useful information for the operator about relative intensity of flames, oxygen, and hydrogen concentrations in flue gases. This information is valuable for optimization of gaseous fuel combustion. The equipment set was used in development of an automatic control system for processes at a heat station.

Cogeneration plant with exhauster gas turbine and external combustion

A.P. Kaloshin
Pages: 309-316

Abstract >>
The paper presents the method and results for technical and economical study of a cogeneration plant with exhauster gas turbines fueled by solid fuel. The search of fundamental regularities of the processes allowed us to recommend optimal parameters for different variants of power plant operation and formulate recommendations for optimal configuration of a cogeneration plant with exhauster gas turbines.