Explosion Parameters of Gaseous JP-10/Air Mixtures

Zhang, Qi; Li, Xueling

doi:10.22211/cejem/64982

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…There is no necessity for all of the liquid phase to be converted to the vapour phase, but a sufficient amount of vapour fuel must be present for the detonation process to proceed. The total amount of pre-vaporized fuel depends on the temperaturedependent saturated vapour pressure of the fuel; and thus, the total vapour molar fraction will be stabilized even when the initial droplet concentration continues to increase, which is reasonably consistent with the experimental results of Zhang and Liu [30]. Thus, simulations using the droplet evaporation and breakup models presented here have been validated by experimental work.…”

Section: Resultssupporting

confidence: 82%

Numerical Simulations of the Effects of Droplet Size and Concentration on Vapour-Droplet JP-10/Air Detonations

Liu¹,

Zhou²

2018

Cent. Eur. J. Energ. Mater.

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Two-dimensional simulations were conducted for JP-10 mono-dispersed vapour-droplet detonation in air, based on the detonation mechanism for clouds and validation of the extending critical droplet size limits in previous tests. In the simulations, the discrete phase model combined with the droplet evaporation and droplet breakup models was used. Utilizing a wide range of mono-dispersed droplet sizes and initial droplet concentrations, all cases of JP-10 droplets with a certain amount of pre-vaporized fuel can successfully achieve the deflagration to detonation transition. Detonation velocities at the equivalent concentration with droplet diameters no larger than 50 μm are in good agreement with the theoretical detonation velocities. The effects of droplet size and initial droplet concentration on the detonation behaviour were also investigated. Detonation velocities attained with droplet diameters below 50 μm appear to decrease very slightly with droplet size, but are almost equal to the velocity in gases. When the droplet diameter is above 50 μm, there is a decrease in simulated detonation velocity compared with fine droplets, and no secondary pressure peak was observed. For fuel-rich combustion, detonation velocities decrease rapidly with an increase in initial droplet concentration, and post-wave pressure fluctuation was obviously irregular, caused by the secondary local explosion of the droplets.

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Section: Resultssupporting

confidence: 82%

Numerical Simulations of the Effects of Droplet Size and Concentration on Vapour-Droplet JP-10/Air Detonations

Liu¹,

Zhou²

2018

Cent. Eur. J. Energ. Mater.

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“…Understanding the characteristics of the ignition and explosion of IPN/JP-10 in air aerosols is an important prerequisite for their proper usage. Although many research studies on the ignition and detonation of JP-10/air [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and IPN/air [22][23][24][25][26][27][28] have been conducted, only minimal information on the explosivity of IPN/air aerosols at different SMDs is available in the literature. Moreover, few researchers have focused on the explosivity of IPN and JP-10 binary mixtures or performed comparative studies of IPN/ JP-10 mixtures in air aerosols.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of the Explosion Characteristics of IPN and IPN/JP‐10 Mixtures in Air Aerosols

Wang

2017

Propellants Explo Pyrotec

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This article presents a comparison of the explosion characteristics of mixtures of isopropyl nitrate (IPN, (CH 3 ) 2 CHONO 2 ) and JP-10 (C 10 H 16 , tricycle [5.2.1.0 2,6 ] decane) in air aerosols. The explosion pressure, flame temperature, maximum rate of pressure rise, maximum rate of temperature rise, and lower flammability limits (LFLs) were measured for two sets of IPN and mixed IPN/JP-10 in air aerosols at different concentrations and Sauter mean diameters (SMDs) of 19 mm and 34 mm, respectively, and the values were compared with the experimental results of JP-10/air aerosols with SMDs of 20 mm and 35 mm (from our previous research). Experiments were also performed to study various concentrations at various ignition energies for the IPN/ air aerosols and the explosions of binary mixture aerosols with various mass ratios of IPN and JP-10. The experimental results indicated that for the IPN/air and JP-10/air aerosols with a mean SMD of~34 mm, the maximum peak pressure and maximum peak temperature of the IPN/air aerosols were greater than those of the JP-10/air aerosols. The maximum rate of pressure rise of the IPN/air aerosols reached a maximum value of 395.3 MPa/s at a mean SMD of~34 mm, and the pressure increased more abruptly in the IPN/air aerosols than in the JP-10/air aerosols. The LFLs of the IPN/air aerosols occurred with a total concentration of 197 g/m 3 at a mean SMD of 19 mm and a total concentration of 233 g/ m 3 at a mean SMD of 34 mm, whereas the LFLs for the JP-10/air aerosols with SMDs of 20 mm and 35 mm were less than 47 g/m 3 and 40 g/m 3 , respectively. The experimental results presented here also showed that the maximum peak pressure was 1.07 MPa at a binary liquid mass ratio of IPN:JP-10 (%) of 72 : 28 and a mean SMD of~34 mm.Keywords: IPN/air and JP-10/air aerosols · Explosion characteristics · Lower flammability limit · Ignition energy · Various mass ratios of binary mixtures 2 3 4 5 6 7 8

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“…[9] Since the modeling of non-ideal behavior in the computer codes requires the incorporation of reaction kinetics into fluid-flow equations (e. g. Wood and Kirkwood model), is a complex procedure, Zhang et al proposed the adjustment of the Becker-Kistiakowsky-Wilson equation of state (BKW-EOS) by using the parameter k to estimate the detonation pressure/ velocity of aluminized explosives. [10] Non-ideal explosives may show different detonation properties as those estimated by complex computer codes [3][4] where partial equilibriums are usually used here. Recently, the laser-induced breakdown spectroscopy was employed to measure the performance of different non-ideal explosives.…”

Section: Introductionmentioning

confidence: 99%

An improved correlation for reliable assessment of the detonation performance of non‐ideal explosives containing metals and the other solid particulates

Jafari

Keshavarz

Motamedi

et al. 2021

Zeitschrift anorg allge chemie

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Explosives containing metals and the other solid particulates have wide applications in air-blast and underwater explosives. Due to the non-ideal behavior of these explosives, available complex computer codes and empirical methods cannot usually provide a reliable estimation of their detonation velocity. Large experimental data of detonation velocity (392 experimental data) corresponding various types of ideal and non-ideal explosives were collected from different sources to derive a general correlation. The new model assumes partial secondary reactions of metal and active particulates with gaseous products. Optimum values of different products are obtained by maximizing the coefficient of determination (R 2) of the correlation and minimizing the mean absolute percentage error (MAPE) of the calculated results from experimental values of detonation velocities. The MAPE values of the new model and one of the best available methods are 3.55 and 11.16 respectively, for 90 non-ideal explosives, which confirm much high reliability of the new method.

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Explosion Parameters of Gaseous JP-10/Air Mixtures

Cited by 9 publications

References 23 publications

Numerical Simulations of the Effects of Droplet Size and Concentration on Vapour-Droplet JP-10/Air Detonations

Numerical Simulations of the Effects of Droplet Size and Concentration on Vapour-Droplet JP-10/Air Detonations

A Comparative Study of the Explosion Characteristics of IPN and IPN/JP‐10 Mixtures in Air Aerosols

An improved correlation for reliable assessment of the detonation performance of non‐ideal explosives containing metals and the other solid particulates

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