Experimental and simulation testing of thermal loading in the jet tabs of a thrust vector control system

Živković, Sanja; Milinović, Momčilo; Stefanović, P; Pavlović, Pavle B.; Gligorijevic, I Nikola

doi:10.2298/tsci150914208z

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…The radiation model for the numerical simulation was P-1. More about this model can be found in [16]. Experimental results were obtained by firing on proving ground with a 20mm gun which is shown in figure 3.…”

Section: Numerical Modelmentioning

confidence: 99%

Modeling of gas parameters in the cylinder of the automatic gun during firing

et al. 2020

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The change of gas parameters in the cylinder of the automatic gun has a great influence on the dynamics of the gun. Many factors have an influence on the gas parameters in the gas cylinder such as the diameter and position of the gas port, the initial volume of the gas cylinder, the gap between the piston and the cylinder, initial temperature of the cylinder parts, etc. The analytical model was made to analyze the parameters on which depends gas piston dynamics. The numerical simulation with CFD software ANSYS Fluent was performed to analyze the change of the thermodynamic properties of the gases in the cylinder, temperature change of the cylinder parts and dynamics of the gas piston. The experiment was performed to provide pressures in the barrel and the gas cylinder and velocity of the gas piston. The comprehensive comparisons between results obtained by the analytical model, the numerical simulation and experiments have been performed and good agreements were observed.

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Section: Numerical Modelmentioning

confidence: 99%

Modeling of gas parameters in the cylinder of the automatic gun during firing

et al. 2020

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“…The convective heat transfer coefficient is calculated from turbulent boundary layer and the P-1 heat radiation model is applied. More details are given in [25].…”

Section: The Nern Code Calculationmentioning

confidence: 99%

Experimental and numerical analysis of thermo-chemical erosion in gun steel

Rezgui¹,

Mickovic²,

Zivkovicc³

et al. 2018

Therm sci

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Various factors of thermo-chemical erosion process in gun steel were analysed. The factors are mainly related to the thermal load of gun barrel inside surface, characteristics of barrel surface and chemical interactions between propellant combustion products and barrel surface. The experimental simulation of conditions in gun barrel was carried out by vented vessel firings in the device based on modification of 37 mm M39 gun. The nozzle mass loss during firing was the measure of gun steel erosion. The main thermal factor of erosion is maximum nozzle inner surface temperature. This temperature was determined experimentally by micro thermocouples measurements at specified distance away from the inner surface and by numerical analysis of the inverse heat conduction problem. Modelling of two-phase flow of propellant combustion products and unburned propellant grains in the vented vessel and heat transfer to the nozzle were conducted using developed 1-D interior ballistic code and CFD simulation in FLUENT. Influence of different propellants, TiO 2 /wax wear reducing liner and tungsten-disulfide nanoparticles layer on nozzle erosion was analysed. Good agreement between experimental and computational results was achieved.

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“…Fuel combustion can produce a significant thermal effect on the total load level. Detailed CFD analysis of the thermal effect at the rocket nozzle is analyzed in Zivkovic et al 6 Jet tabs of the nozzle for rocket flight control are significantly thermally loaded. Temperature distribution and heat transfer are identified in order to find out the solution to prevent material degradation of nozzle tabs.…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of the gas generator multifunctional bulkhead considering the thermal and structural loads

Kolarević

Stanković

Miloš

et al. 2022

Advances in Mechanical Engineering

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The operation of gas generators brings relatively high thermo-mechanical loads on the gas generator structure. The objective of this article is to determine the operating conditions, in terms of mechanical loads at extremely high temperatures in very limited and narrow space, of a multifunctional bulkhead for application on specific kinds of gas generators with back-to-back rotor concept. The paper contains numerical analysis and experimental investigation for determining the loads and behavior of the structure. Numerical analysis indicates that there is significant influence of the Tesla turbine effect on flow parameters. Also, uneven pressure distribution and significant thermal loads are identified. With experimental investigation and subsequent exploitation tests, it was concluded that the presented methodology identifies the operating conditions, truthfully simulates the bulkhead stress state and deformations and that the presented design solution satisfied all demands. Regarding results obtained by these numerical simulations, the innovative design solution for the multifunctional bulkhead was proposed.

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Experimental and simulation testing of thermal loading in the jet tabs of a thrust vector control system

Cited by 4 publications

References 6 publications

Modeling of gas parameters in the cylinder of the automatic gun during firing

Modeling of gas parameters in the cylinder of the automatic gun during firing

Experimental and numerical analysis of thermo-chemical erosion in gun steel

Analysis and design of the gas generator multifunctional bulkhead considering the thermal and structural loads

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