Field of the flow and amplification coefficients in the resonator cavity of a gas-dynamic laser working on the combustion products of kerosene. Two-dimensional calculation and comparison with experiment

1979 ◽  
Vol 15 (1) ◽  
pp. 70-75 ◽  
Author(s):  
M. G. Ktalkherman ◽  
V. A. Levin ◽  
V. M. Mal'kov ◽  
Yu. V. Tunik
Keyword(s):  
Combustion Products ◽  
Two Dimensional ◽  
Resonator Cavity ◽  
Gas Dynamic ◽  
Comparison With Experiment

scholarly journals Numerical simulation of the interaction between combustion products of a cartridge pressure accumulator and oxygen in the launch container

2019 ◽  
pp. 68-73
Author(s):  
R. A. Peshkov ◽  
D. R. Ismagilov
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Combustion Products ◽  
Computational Domain ◽  
Two Dimensional ◽  
Dynamic Parameters ◽  
Gas Dynamic ◽  
Three Dimensional Models ◽  
Main Components ◽  
Research Show

The paper introduces a mathematical model for calculating the gas-dynamic parameters in the launch container. The model takes into account chemical interactions between the main components of the combustion products, i.e. carbon monoxide and hydrogen, and oxygen. The resulting energy can be used to increase the initiating pulse of the rocket. Within the research, we described the basic requirements for the grid model, and analyzed the accuracy of the results obtained. Furthermore, we compared calculation data of pressure in the launch container with the results of the known method. Findings of research show that the use of two-dimensional and three-dimensional models makes it possible to obtain not only medium-volume gas-dynamic parameters, such as pressure, temperature, density, but also the distribution of these parameters over the computational domain. The developed method of numerical simulation will allow us to estimate the effect of changes in the configuration of the sub-rocket volume and other parameters on the dynamics of the rocket movement without conducting an expensive experiment

The Application of Multi-Zone Thermal Radiation Models to Investigate the Energy Efficiency of a Metal Reheating Furnace Under Start Up Conditions

1999 ◽  
Author(s):  
John Ward ◽  
Sara A. C. Correia ◽  
João L. V. A. Sousa
Keyword(s):  
Combustion Products ◽  
Furnace Chamber ◽  
Zone Model ◽  
Two Dimensional ◽  
Heating Rates ◽  
Zone Method ◽  
Discharge Temperature ◽  
Start Up ◽  
Steel Bars ◽  
Industrial Heating

Abstract The zone method of radiation analysis has been widely used in mathematical models of a range of industrial heating processes. This paper is thus concerned with the use of a two-dimensional, multi-zone model to predict fuel consumptions, heating rates and load temperatures following the “cold start up” of a gas-fired furnace heating steel bars to a nominal discharge temperature of 1250°C. The model takes into account variations in the flows of the combustion products and in particular examines the influence of the re-circulation of these hot gases within the furnace chamber. The predictions of this complex two-dimensional model are compared with those of a one-dimensional so-called “long furnace model” to illustrate the differences resulting from the use of a more sophisticated multi-zone model.

Interaction of light with a lattice of dipoles: substrate-related effects

1996 ◽  
Vol 74 (9-10) ◽  
pp. 603-607 ◽  
Author(s):  
Bernard M. de Dormale
Keyword(s):  
Dipole Interaction ◽  
Two Dimensional ◽  
Dimensional Lattice ◽  
Comparison With Experiment

We present a very easy way to take into account exactly the effect of a substrate for a two-dimensional lattice of spheres subject to dipole–dipole interaction. Comparison with experiment shows better agreement than when other dipole treatments are used.

A THREE-DIMENSIONAL SIMULATION OF BRITTLE SOLID FRACTURE

1996 ◽  
Vol 07 (05) ◽  
pp. 717-729 ◽  
Author(s):  
ALEXANDER V. POTAPOV ◽  
CHARLES S. CAMPBELL
Keyword(s):  
Three Dimensional ◽  
Three Dimensions ◽  
Size Distributions ◽  
Two Dimensional ◽  
Brittle Solid ◽  
Space Filling ◽  
Comparison With Experiment ◽  
Linear Dimensions ◽  
Dimensional Simulation ◽  
Simulated Material

This paper describes an extension into three dimensions of an existing two-dimensional technique for simulating brittle solid fracture. The fracture occurs on a simulated solid created by "gluing" together space-filling polyhedral elements with compliant interelement joints. Such a material can be shown to have well-defined elastic properties. However, the "glue" can only support a specified tensile stress and breaks when that stress is exceeded. In this manner, a crack can propagate across the simulated material. A comparison with experiment shows that the simulation can accurately reproduce the size distributions for all fragments with linear dimensions greater than three element sizes.

Two-dimensional gas-dynamic model of laser ablation in an ambient gas

2000 ◽  
Vol 154-155 ◽  
pp. 66-72 ◽  
Author(s):  
A.V. Gusarov ◽  
A.G. Gnedovets ◽  
I. Smurov
Keyword(s):  
Laser Ablation ◽  
Dynamic Model ◽  
Two Dimensional ◽  
Gas Dynamic ◽  
Ambient Gas

scholarly journals Calculation of Toxic Substance Burning with Formation of Combustion Products’ Vertical Supersonic Stream

2016 ◽  
Vol 5 (6) ◽  
pp. 30-37
Author(s):  
Дорофеев ◽  
A. Dorofeev ◽  
Бурцев ◽  
I. Burtsev
Keyword(s):  
Mathematical Modeling ◽  
Supersonic Flow ◽  
Rocket Engine ◽  
Toxic Substance ◽  
Combustion Products ◽  
Liquid Rocket Engine ◽  
Supersonic Stream ◽  
Gas Dynamic ◽  
Liquid Rocket ◽  
The One

A system for burning of a destroyed highly toxic substance with formation of a vertical supersonic stream of combustion products moved away to the atmosphere on considerable heights has been considered. A technique and an algorithm for conjugated gas-dynamic and thermodynamic calculation of working processes in two-zonal unit with primary burning using air in a camera similar to the one of a liquid rocket engine, and after-burning in a supersonic flow have been proposed. The technique has been approved on the examples of after-burning mathematical modeling and a parametrical research on combustion completeness influence on composition and properties of products resulting from heptyl combustion in air with after-burning in case of methane supply in the second zone.

Two-Dimensional Autowave Gas-Dynamic Structures in Isentropically Unstable Heat-Releasing Gas

2018 ◽  
Vol 44 (12) ◽  
pp. 1163-1166 ◽  
Author(s):  
D. S. Ryashchikov ◽  
N. E. Molevich ◽  
D. I. Zavershinskii
Keyword(s):  
Two Dimensional ◽  
Gas Dynamic ◽  
Dynamic Structures

scholarly journals Fluid Dynamics of Thrust Vectorable Submerged Nozzle

Fluids ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 278
Author(s):  
Sergey Denisikhin ◽  
Vladislav Emelyanov ◽  
Konstantin Volkov
Keyword(s):  
Cylindrical Channel ◽  
Geometric Model ◽  
Combustion Products ◽  
Vortical Flow ◽  
Solid Rocket Motor ◽  
Time Step ◽  
Gas Dynamic ◽  
Computational Mesh ◽  
Nozzle Block ◽  
Solid Rocket

A numerical simulation of the gas-dynamic processes in the thrust vectorable nozzle of the solid rocket motor is considered. Construction of a geometric model and a generation of computational mesh, and reconstruction of model and mesh at each time step are discussed. Calculations of the flowfield of combustion products in the pre-nozzle chamber and nozzle block are carried out for various angles of nozzle rotation. The distributions of the gas dynamic quantities in the pre-nozzle volume corresponding to the outflow of the combustion products from the cylindrical channel and star-shaped channel are compared, as well as the solutions of the problem obtained with quasi-stationary and unsteady formulations. The effects of the channel shape on the distribution of flow quantities and formation of a vortical flow structure in the nozzle block are discussed.

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