Begell House Inc.
TsAGI Science Journal
TSAGI
1948-2590
45
1
2014
CONGRATULATIONS TO VLADIMIR VASILYEVICH SYCHEV ON HIS 90TH ANNIVERSARY!
1-2
10.1615/TsAGISciJ.2014011343
Sergei Leonidovich
Chernyshev
Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky,
Moscow Region, 140180, Russia
V. V. Sychev
DETERMINATION OF MATERIAL CATALYCITY AT HIGH TEMPERATURES IN THE VAT-104 HYPERSONIC WIND TUNNEL
3-20
10.1615/TsAGISciJ.2014011332
Ivan Vladimirovich
Egorov
Deputy Director, Aerothermodynamics, Central Aerohydrodynamic Institute (TsAGI), 1, Zhukovsky Str., Zhukovsky, Moscow Region, 140180, Russia; MIPT, 9 Institutsky pereulok, Dolgoprudny, Moscow region, Russia
Boris Evgen'evich
Zhestkov
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, Moscow Region 140180, Russia
Vladimir Viktorovich
Shvedchenko
Central Aerohydrodynamic Institute (TsAGI) , Zhukovsky, Moscow region, Russia
hypersonic wind tunnel
heat transfer
catalycity
thermoprotective material
Nitrogen and airflows in a duct of the VAT-104 high-temperature wind tunnel are modeled by means of the numerical solution to the unsteady two-dimensional Navier−Stokes equations in wide ranges of the total pressure (1−40 kPa) and stagnation temperature (5500−8000 K). Parametric numerical studies of nonequilibrium heat transfer on the end face of a thermally insulated circular cylinder at different cylinder surface catalycity values are performed. For each flow regime, the dependence of the surface temperature on the heterogeneous recombination rate constant Kw is obtained and the derivative α = dTw /dKw is determined. The catalycity of the C−SiC thermoprotective material in nitrogen and air plasma flows at surface temperatures of Tw = 1500−1900 K is determined in the calculations and experiments based on the measured temperature differences of the reference and examined materials.
STUDY OF GAS-DYNAMIC STABILIZATION OF A LONGITUDINAL DISCHARGE IN FLAT DUCTS
21-34
10.1615/TsAGISciJ.2014011342
Anatoliy Vasil'evich
Zubtsov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovskystr., Zhukovsky, 140180, Moscow region, Russia
Vladimir Vladimirovich
Ivanov
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky Str. 1, Zhukovsky, Moscow Region, 140180 Russia
Vladimir Vladimirovich
Skvortsov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia
Mikhail Alexandrovich
Starodubtsev
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky, 140180 Russia
Aleksandr Aleksandrovich
Uspenskii
Central Aerohydrodynamic Institute (TsAGI), Zhukovsky str. 1, Zhukovsky, Moscow Region, 140180 Russia
Andrey Yuryevich
Urusov
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Str., Zhukovsky,
Moscow Region, 140180, Russian Federation
combustion
electrical discharge
supersonic flow
The results of studies of firing and combustion of hydrocarbon fuel in a supersonic flow that was realized with the help of a module in relation to nonequilibrium electrical discharge generation are presented. The aerofuel combustion zone was not attached to the flat duct walls of the aerophysics setup (APS) but was closed to the module (anode−cathode), which had small drag. The results of the numerical computation of the spatial structure of flow over the module installed in the flat duct are presented. The possibility of gas-dynamic stabilization of a longitudinal discharge near the axis of a flat duct with closely spaced metallic walls is shown.
ABOUT DIFFERENT WAYS TO DETERMINE THE HEAT EFFECT AND THE COMBUSTION EFFICIENCY IN A FLOW OF REACTING GAS
35-59
10.1615/TsAGISciJ.2014011381
Vladimir Viktorovich
Vlasenko
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia
combustion
heat effect
combustion efficiency
Euler equations
Reynolds equations
finite-rate reactions
molecular and turbulent diffusion
numerical simulation
Several ways to estimate heat release due to chemical reactions and heat efficiency on the basis of a detailed picture of flow with combustion are proposed. Such a detailed flow field may be obtained using numerical calculation on the basis of Euler or Reynolds equations. Examples of using data about heat release for the analysis of flow physics are shown.
INVESTIGATION OF EFFUSION/FILM COOLING EFFICIENCY FOR SHARP CONE HEAT FLUX CONTROL AT HIGH SUPERSONIC SPEEDS
61-87
10.1615/TsAGISciJ.2014011330
Pavel Vladimirovich
Chuvakhov
Central Aerohydromynamic Institute, 1 Zhukovskogo str., Zhukovsky, Moscos reg., 140180, Russia; and Moscow Institute of Physics and Technology (State University), 9 Institutskiy per., Dolgoprudny, Moscow reg., 141700, Russia
heat transfer
film cooling
effusion cooling
cone flow
numerical modeling
supersonic flow
boundary layer separation
turbulence
Reynolds-averaged Navier-Stokes equations (RANS)
The results of a numerical investigation of heat flux control over a sharp cone surface by means of blowing cooling gas (air) through a continuous circular slot at the cone surface are presented. Different ways of implementing film cooling are addressed, namely, coolant injection in the downstream and upstream directions and through a microporous surface element at a right angle to the surface. The flow structure is analyzed in the blowing region. The local cooling effect is found to rise significantly as the mass flow rate of the coolant is increased. It is to be noted that an optimal state between cooling and total mechanical energy losses due to the coolant/external flow interaction needs to be found.