Ablation characteristics and reaction mechanism of insulation materials under slag deposition condition

Guan, Yiwen; Li, Jiang; Liu, Yang

doi:10.1016/j.actaastro.2017.02.001

Cited by 21 publications

(9 citation statements)

References 10 publications

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“…The achieved densities are comparable (1.05-1.06 g/cm 3 ) for all the cure conditions. At each cure condition Further, the achieved % elongation in this case is less than the requirement.…”

Section: Mechanical Propertiesmentioning

confidence: 78%

“…Most of the findings of the earlier study were in agreement with the literature. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] It also paved way for EPDM based insulation to be used in large CRMC as huge benefits were obtained in terms of reduction in weight, improved low temperature flexibility, improved aging, and erosion resistance. [16][17][18][19][20][21][22][23][24] Curing of EPDM insulations used for comparative characterization was carried out at 120 C for a duration of 6 h, fixed with the help of achieved mechanical properties as Rheometer curves were progressive at 120, 140, and 150 C temperatures even for long duration.…”

Section: Introductionmentioning

confidence: 99%

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Cure behavior of ethylene propylene diene terpolymer insulation for large composite rocket motor casing

et al. 2021

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Two potential formulations of sulfur cured ethylene propylene diene terpolymer (EPDM) insulation were characterized against the proven insulation based on nitrile rubber (NBR) in the earlier study. Unlike the proven insulation, the cure behavior exhibited by sulfur cured EPDM is quite different in that, the rheometer curves exhibit marching behavior even at elevated temperature for longer duration (160 C for 7 h; most severe condition). This warranted extensive cure study at different temperatures for varying durations in order to determine the optimum cure condition. The methodology adopted to find out the optimum cure condition and corroboration of the same in terms of instrumental techniques (differential scanning calorimetry, thermogravimetric analysis, and Fourier transform infrared), which are quite interesting, are discussed in this article.

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“…The achieved densities are comparable (1.05-1.06 g/cm 3 ) for all the cure conditions. At each cure condition Further, the achieved % elongation in this case is less than the requirement.…”

Section: Mechanical Propertiesmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Cure behavior of ethylene propylene diene terpolymer insulation for large composite rocket motor casing

et al. 2021

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“…Various studies have been carried out on the effect of aramid fiber, carbon fiber, hybrid reinforcement (Kevlar pulp+alumina+silica), Nanosilica, varying concentration of vulcanizing agent on the achieved properties/performance of EPDM insulator. [4][5][6][7][8][9][10][11] Literature is available on improving the interface bonding properties of EPDM insulator to propellant by incorporating and varying the concentration of CSE and HTPB based bonding agent and weakening of bond strength by absorbed water. 12,13 Study on vulcanization kinetics, ageing in water and thermal degradation behavior of EPDM insulator have also been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Kevlar is used as one of the reinforcing fillers to improve the performance of EPDM with respect to mechanical and thermal properties. Various studies have been carried out on the effect of aramid fiber, carbon fiber, hybrid reinforcement (Kevlar pulp+alumina+silica), Nanosilica, varying concentration of vulcanizing agent on the achieved properties/performance of EPDM insulator 4‐11 . Literature is available on improving the interface bonding properties of EPDM insulator to propellant by incorporating and varying the concentration of CSE and HTPB based bonding agent and weakening of bond strength by absorbed water 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Ethylene Propylene Diene Terpolymer based insulation against Nitrile rubber based insulation for large Composite Rocket Motor Casing

Jabez

Das

Manivannan

et al. 2020

Polymers for Advanced Techs

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Even though literature available on EPDM is abundant, the data on physical, mechanical, thermal, interface properties and ablative performance as specifically required for the design and acceptance of internal insulation of large Composite Rocket Motor Casing is scant in the plethora of literature available in the subject of EPDM insulation. This gave the impetus to take up this experimental work wherein most promising formulation of EPDM with Kevlar and silica as reinforcing fillers and with only silica as reinforcing filler were thoroughly characterized for the insulation requirements of large Composite Rocket Motor Casing and compared with the performance of proven Nitrile rubber based insulation. The significant findings which are unique, are discussed in this paper.

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“…It is classified as a submerged nozzle, as its entrance extends to within the combustion chamber of the SRM. In general, the submerged nozzle is always working under extremely harsh circumstances, such as thermal load, mechanical load, thermochemical ablation, and particle-laded flow [4][5][6][7]. Hence, the structure integrity is of great importance for the normal operation of the nozzle.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Coupling Thermal and Mechanical Influence on Submerged Nozzle in Solid Rocket Motor

Gong¹,

Fan²

2020

International Journal of Aerospace Engineering

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The coupling thermal and mechanical effect on submerged nozzles is important in the design of modern rockets upon thermal loading and aerodynamic pressure. In this paper, a simulation with the subroutine of nonuniform pressure and nonuniform heat transfer coefficient was conducted to study the thermo-structural response of a submerged nozzle at the pressure 6 MPa and stagnation temperature 3200 K. Both the aerodynamic parameters and heat coefficients were obtained through analyzing the flow field. It was found that the thermal loading had an important influence on the stress of throat insert for the solid rocket motor (SRM). The hoop stress increases at first and then decreases with the increase of time for the throat insert. The ground hot firing test of SRM with a submerged nozzle was carried out. The experimental results showed that the structural integrity of the submerged nozzle is very normal during SRM operation. The present method is reasonable, which can be applied to study the thermo-structural response of submerged nozzle for SRM.

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Ablation characteristics and reaction mechanism of insulation materials under slag deposition condition

Cited by 21 publications

References 10 publications

Cure behavior of ethylene propylene diene terpolymer insulation for large composite rocket motor casing

Cure behavior of ethylene propylene diene terpolymer insulation for large composite rocket motor casing

Evaluation of Ethylene Propylene Diene Terpolymer based insulation against Nitrile rubber based insulation for large Composite Rocket Motor Casing

Numerical Simulation of Coupling Thermal and Mechanical Influence on Submerged Nozzle in Solid Rocket Motor

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