Solid-propellant erosive burning

Godon, J.; Duterque, J.; Lengellé, G.

doi:10.2514/3.23544

Cited by 32 publications

(5 citation statements)

References 16 publications

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“…The parameter K * is a shear layer coefficient, whose value set at 2600 m −1 , along with a value for f lim of 2.5 × 10 −4 , produced a good comparison to experimental data for various solid propellants (composite and double-base) and motors (see Figure 2 for one classical example profile showing the characteristic "dipping" effect on r b /r o observed with negative erosive burning, at low axial flow speed; [8,9]). At higher flow speeds, the positive erosive burning component r e , established from a convective heat feedback premise [8], should dominate:…”

Section: Numerical Modelmentioning

confidence: 92%

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Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Greatrix¹

2021

Preprint

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The ability to predict with some accuracy a given solid rocket motor’s performance before undertaking one or several costly experimental test firings is important. On the numerical prediction side, as various component models evolve, their incorporation into an overall internal ballistics simulation program allows for new motor firing simulations to take place, which in turn allows for updated comparisons to experimental firing data. In the present investigation, utilizing an updated simulation program, the focus is on quasi-steady performance analysis and scale effects (influence of motor size). The predicted effects of negative/positive erosive burning and propellant/casing deflection, as tied to motor size, on a reference cylindrical-grain motor’s internal ballistics, are included in this evaluation. Propellant deflection has only a minor influence on the reference motor’s internal ballistics, regardless of motor size. Erosive burning, on the other hand, is distinctly affected by motor scale.

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Section: Numerical Modelmentioning

confidence: 92%

“…Theoretical and experimental [8,9] data for burning rate augmentation as a function of mass flux (Du ∞ ), double-base solid propellant.…”

Section: Figurementioning

confidence: 99%

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Greatrix¹

2021

Preprint

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“…, produced a good comparison to experimental data for various solid propellants (composite and double-base) and motors (see Figure 2 for one classical example profile showing the characteristic "dipping" effect on r b /r o observed with negative erosive burning, at low axial flow speed; [8,9]). At higher flow speeds, the positive erosive burning component r e , established from a convective heat feedback premise [8], should dominate:…”

Section: Numerical Modelmentioning

confidence: 99%

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Greatrix

2010

Energies

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Abstract:The ability to predict with some accuracy a given solid rocket motor's performance before undertaking one or several costly experimental test firings is important. On the numerical prediction side, as various component models evolve, their incorporation into an overall internal ballistics simulation program allows for new motor firing simulations to take place, which in turn allows for updated comparisons to experimental firing data. In the present investigation, utilizing an updated simulation program, the focus is on quasi-steady performance analysis and scale effects (influence of motor size). The predicted effects of negative/positive erosive burning and propellant/casing deflection, as tied to motor size, on a reference cylindrical-grain motor's internal ballistics, are included in this evaluation. Propellant deflection has only a minor influence on the reference motor's internal ballistics, regardless of motor size. Erosive burning, on the other hand, is distinctly affected by motor scale.Keywords: solid rocket motor internal ballistics; scale effects; quasi-steady operation

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“…Another modeling approach has shown that the erosive burning is due to the penetration of the turbulence within the flame that enhances the flow transport coefficients and the heat flux to the burning surface [5]. A complete review of theoretical and experimental works on erosive burning of the solid propellants has been presented, and the scaling effect on this phenomenon was analyzed too [6].…”

Section: Introductionmentioning

confidence: 99%

Using Surface Grooves on Propellant Grain to Control the Erosive Burning in Solid Rocket Motors

Tahsini

Gheshlaghi

Razzaghi

2021

Propellants Explo Pyrotec

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This paper aims to introduce a new technique to eliminate the erosive burning phenomenon in solid rocket motors. The erosive burning which occurs in motors with high volumetric loadings and small port to throat area ratios, has some disadvantages like an early phase over‐pressure and exposing the rocket chamber casing by hot combustion gas flows. The innovative simple practical method is based on the geometrical treatment of the propellant grain, locating some grooves on the surface at its aft‐end, to reduce the rate of the heat transfer into the burning surface where the erosive burning is likely to occur. The numerical analysis of the flow on the grooved wall is utilized to physically explain the correctness of this idea, and the quasi‐one‐dimensional simulation of the internal ballistics of the solid rocket motor is performed to demonstrate the effect of grooves on the performance map of the motor. The results show that by using this suggested simple technique, the designer can eliminate the erosive burning and improve the motor‘s performance maps.

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Solid-propellant erosive burning

Cited by 32 publications

References 16 publications

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Scale Effects on Quasi-Steady Solid Rocket Internal Ballistic Behaviour

Using Surface Grooves on Propellant Grain to Control the Erosive Burning in Solid Rocket Motors

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