Dynamic Vivacity and Its Application to Conventional and Electrothermal-Chemical (ETC) Closed Chamber Results

Oberle, William F.

doi:10.21236/ada398117

Cited by 15 publications

(8 citation statements)

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“…The pressure range to which the regressions were applied was chosen by analysis of the dynamic vivacity curves. The use of vivacity to validate the data range over which regressions can be performed has previously been discussed [19,20].…”

Section: Methodsmentioning

confidence: 99%

Erosivity and Performance of Nitrogen‐Rich Propellants

Lavoie

Petre

Dubois

2018

Propellants Explo Pyrotec

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Five propellant formulations were test fired both in a vented vessel and a closed vessel. Two formulations contained 35 % weight of nitrogen‐rich materials. The erosion by weight of the propellants ranged from 0.53 g to 1.31 g after two consecutive test firings of a given propellant. The addition of nitrogen‐rich materials resulted in reduced erosion. Scanning electron microscope and energy dispersive X‐ray spectroscopy revealed nitrogen in the erosion pieces for one of the reference propellants (SB) and the two nitrogen‐rich propellants. The two hottest propellants cause melting of the erosion pieces. The presence of nitrogen‐rich materials has a tremendous impact on the burning rates with the burning rate increase at 100 MPa reaching up to 2.4 times that of the formulation used as the base for the nitrogen‐rich propellants.

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Section: Methodsmentioning

confidence: 99%

Erosivity and Performance of Nitrogen‐Rich Propellants

Lavoie

Petre

Dubois

2018

Propellants Explo Pyrotec

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“…For this form of the burning rate law, the aforementioned limitations formulated for the linear form of the burning rate law do not apply. The determination of the burn rate, r(p), followed by coefficient β and exponent α, is possible in this case by comparing the two forms of the gas inflow equation [2,8]; resulting from the analysis of the geometric model of propellant burning (Equation 4):…”

Section: Introductionmentioning

confidence: 99%

On a Certain Method of Determining the Burning Rate of Gun Propellant

Leciejewski¹,

Surma²

2019

Cent. Eur. J. Energ. Mater.

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“…These results can be attributed that the propellants modified by nanocomposites were hard to get ignited and penetrated, resulting the ini-tial combustion area was small. Previous studies have proved that dynamic vivacity depends on the actual burning surface area and the L-B curve could reflect the variation trend of burning progressivity for propellant [13,21,22].…”

Section: Influence Of Composite Additives On the Combustion Performancementioning

confidence: 99%

Effects of an Organic‐inorganic Nanocomposite Additive on the Combustion and Erosion Performance of High Energy Propellants Containing RDX

Sun

Xiao

2017

Propellants Explo Pyrotec

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A nanocomposite microsphere consisting of solid paraffin, nano-TiO 2 , nano-BN, zeolitic imidazolate framework-67 particles and polymethyl methacrylate was prepared and applied as a functional additive for high energy propellants (with about 23 wt % RDX) to reduce the barrel erosion and improve its combustion performance as well. High energy propellants modified with the nanocomposite were manufactured by a solvent extrusion technique. According to the scanning electron microscope and differential scanning calorimetry results, there exists a good compatibility between the nanocomposite and propellant matrix. The energy and combustion performance as well as erosion of the modified propellants were studied by a closed bomb test and an erosion tube device, respectively.Results showed that compared with the unmodified propellant, both the erosion and energy performance of modified high energy propellant gradually decreased with the increase of nanocomposites contents. When the content of nanocomposites was 5.1 %, the erosion mass of the modified propellant reduced to 37.0 % while the propellant force only decreased 5.7 %, indicating that the nanocomposite has enormous ability to improve gun erosion resistance while barely affect energy performance of propellant. Furthermore, the closed bomb burning curves of the samples showed that addition of nanocomposites to propellant matrix could prolong the combustion time, efficiently inhibit the initial generation rate of combustion gas, and further achieve the progressive burning of the propellants.

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Dynamic Vivacity and Its Application to Conventional and Electrothermal-Chemical (ETC) Closed Chamber Results

Cited by 15 publications

References 0 publications

Erosivity and Performance of Nitrogen‐Rich Propellants

Erosivity and Performance of Nitrogen‐Rich Propellants

On a Certain Method of Determining the Burning Rate of Gun Propellant

Effects of an Organic‐inorganic Nanocomposite Additive on the Combustion and Erosion Performance of High Energy Propellants Containing RDX

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