Flame Propagation and Combustion Processes in Solid Propellant Cracks

Kumar, M.; Kovacic, S. M.; Kuo, Kenneth K.

doi:10.2514/3.50983

Cited by 21 publications

(4 citation statements)

References 9 publications

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“…The flame tip then decelerates as it approaches the closed end of the slot. Luminous flame acceleration and deceleration are similar to the behavior Kumar et al observed in manufactured slots of various composite propellants with an ammonium perchlorate (AP) base [13]. While the behavior of the flame in the slot is similar to that observed by Kumar et al, our experiments differ significantly from theirs.…”

Section: Methodscontrasting

confidence: 55%

“…Therefore, the strength of the confinement dictates the observed flame propagation speeds. Kumar et al observed ignition-front propagation velocities near 800 m/s in manufactured slots of several AP-based propellants [13]. Kumar et al worked at even higher pressurization rates than we have achieved and found that higher pressurization rates produce faster propagation velocities.…”

Section: Resultsmentioning

confidence: 80%

See 1 more Smart Citation

Convective burning in gaps of PBX 9501

Berghout

Son

Asay

2000

Proceedings of the Combustion Institute

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Section: Methodscontrasting

confidence: 55%

Section: Resultsmentioning

confidence: 80%

Convective burning in gaps of PBX 9501

Berghout

Son

Asay

2000

Proceedings of the Combustion Institute

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“…Kumar et al [4,5] observed an increase in pressure near the crack front with an increase in crack length and Kuo et al [6] observed crack branching at high pressurization rates. Recently, Berghout et al [3] carried out a comprehensive study on the macroscopic effect of damage on the propellant surface regression.…”

Section: Introductionmentioning

confidence: 97%

Thermomechanical modeling of regressing heterogeneous solid propellants

Srinivasan

Matouš

Geubelle

et al. 2009

Journal of Computational Physics

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“…However, luminosity from the crack quickly became quite nonuniform as a function of length, representing typical combustion response within the crack. Furthermore, decreasing crack gap width to <0.5 mm appeared to usher in a host of nonlinear behavior, including a "galloping" structure apparently resulting from multiple crack closures interspersed with regions of luminous combustion (11). The combustion process within the solid propellant crack was indeed a complex phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Ignition and Flame Propagation in Narrow Channels of Solid Propellant

Chang¹,

Kooker²

2003

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Public reporting burden for th,5 collechon of information is esHmated to average 1 hour per response, including the time for revie,ving instruchons, searching existing data sources gatherinp and mamta.ning the data needed and complehng and reviewing the collection information. Send comments regarding this burden esHmate or anv other aspect of this collechon of information mcludmg suggestions for reducing the burden, to Deparhnent of Defense, Washington Headquarters Services, Directorate for InformaKon Operahons and Reports (0701-0188) 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-1302. Respondents should be aware that notwithstanding any other provision of law, no person shall be suWect to anv penaltx-for failing to comply with a collechon of informaHon if it does not displav a currentlvvalid 0MB conh-ol number . f . 5 PLEASE DO NOT RETURN YOIIR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) July 2003 REPORT TYPE Final TITLE AND SUBTITLE Ignition and Flame Propagation in Narrow Channels of Solid Propellant AUTHOR{S)Lang-Mann Chang and Douglas E. Kooker PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)U.S. Army Research Laboratory ATTN: AMSRL-WM-BD Aberdeen Proving Ground, MD 21005-5066 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. ARL-TR-3011 SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S)13. SUPPLEMENTARY NOTES ABSTRACT " " "Future direct-fire gun systems will require solid propellant at high loading density, which can be achieved with propellant in slab-type geometry such as radial discs, concentric wraps, or scrolls. Adjacent propellant slabs will form porosity as narrow sheet-like channels (with entirely different permeability than bundled sticks or cylindrical grains). Successful functioning of the charge requires rapid ignition and unimpeded flame propagation throughout this system of channels. The present investigation is concerned with characterizing the fundamental ignition and transient combustion behavior of energetic materials when packed in such configurations. A special laboratory apparatus was designed to isolate two propellant channels and allow direct comparison of the influence of variable gap width, wall composition (inert or JA2 here), and channel end closure. Diagnostics include multiple pressure time histories along each channel length and high-speed cinematography of the propagation of flame.

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Flame Propagation and Combustion Processes in Solid Propellant Cracks

Cited by 21 publications

References 9 publications

Convective burning in gaps of PBX 9501

Convective burning in gaps of PBX 9501

Thermomechanical modeling of regressing heterogeneous solid propellants

Ignition and Flame Propagation in Narrow Channels of Solid Propellant

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