Two-phase unsteady flow in solid rocket motors

Dupays, Joel

doi:10.1016/s1270-9638(02)01182-3

Cited by 30 publications

(24 citation statements)

References 17 publications

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“…Erosive burning mechanism is due to increase in gas to solid heat feedback caused by the increase in transport coefficients, and turbulence enhanced mixing and chemical reaction of the oxidizer and fuel rich gases pyrolized for composite propellant. Aluminum droplet combustion and alumina residue behavior in the combustion chamber of SRMs affect combustion instabilities by acting as driving or damping mechanisms [2]. Some of aluminum droplets remain in the motor during its operation and collect in the aft-end region.…”

Section: Introductionmentioning

confidence: 99%

“…3 Two-phase flows with inert and burning aluminum particles as well as the influence of particles on acoustic oscillations in the combustion chamber are considered in [2,[12][13][14][15], where the results of numerical simulations based on the Eulerian-Eulerian and Eulerian-Lagrangean approaches and some experimental results are reported.…”

Section: Introductionmentioning

confidence: 99%

“…Two mechanisms are responsible for attenuation of acoustic oscillations in the combustion chamber [2]. First, the acoustic energy is transferred to and dissipated by particles through the momentum and heat exchange in the two-phase flow.…”

Section: Introductionmentioning

confidence: 99%

“…Their effectiveness depends on oscillation frequencies, droplet sizes and burning-to-residence time ratio. Net contribution of aluminum to the global acoustic balance may be positive or negative [2,3,5].…”

Section: Introductionmentioning

confidence: 99%

“…At high frequencies, particles usually exert a damping effect on acoustic oscillations [2], and suppression of oscillations occurs due to the influence of agglomerates on the fluctuations on the burning surface (mechanism 1). At frequencies below 2000 Hz, mechanism 1 plays a minor role as compared to mechanism 3, but this interaction also leads to damping of oscillations.…”

Section: Introductionmentioning

confidence: 99%

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Pressure oscillations and instability of working processes in the combustion chambers of solid rocket motors

et al. 2017

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Cite this article as: V.N. Emelyanov, I.V. Teterina, K.N. Volkov and A.U. Garkushev, Pressure oscillations and instability of working processesin the combustion chambers of solid rocket motors, Acta Astronautica, http://dx.doi.org/10. 1016/j.actaastro.2016.09.029 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractMetal particles are widely used in space engineering to increase specific impulse and to supress acoustic instability of intra-champber processes. A numerical analysis of the internal injection-driven turbulent gas-particle flows is performed to improve the current understanding and modeling capabilities of the complex flow characteristics in the combustion chambers of solid rocket motors (SRMs) in presence of forced pressure oscillations. The two-phase flow is simulated with a combined Eulerian-Lagrangian approach. The Reynolds-averaged Navier-Stokes equations and transport equations of -model are solved numerically for the gas. The particulate phase is simulated through a Lagrangian deterministic and stochastic tracking models to provide particle trajectories and particle concentration. The results obtained highlight the crucial significance of the particle dispersion in turbulent flowfield and high potential of statistical methods. Strong coupling between acoustic oscillations, vortical motion, turbulent fluctuations and particle dynamics is observed.

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Section: Introductionmentioning

confidence: 99%