Steady state HNG combustion modeling

Louwers, J.; Gadiot, G. M. H. J. L.; Brewster, M. Q.; Son, Steven F.; Parr, T. P.; Hanson‐Parr, D. M.

doi:10.2172/654018

Cited by 3 publications

(10 citation statements)

References 12 publications

(15 reference statements)

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“…This fact agrees well with the absence of HNF among the gas-phase decomposition products, whereas 1 and 3 were detected instead. 30,31,44,45 Moreover, experimental data on the sublimation of HNF support this conclusion as well. As mentioned above, the standard state of HNF is the crystal one with ∆ f H 0 ) -18.4 ( 0.3 kcal/mol.…”

Section: Resultsmentioning

confidence: 80%

“…In the meantime, the main gas-phase products of HNF dissociative vaporization were proposed to be 1 and 3 (Scheme 3). 30,31,44 Louwers et al 37,45 have studied the combustion of HNF in "hot-cell" and "hot-plate" experiments in the temperature range 130-300 °C using the UV-absorption spectroscopy. HONO and NO 2 were the main detectable products; some HNF (vaporized or aerosol) was detected as well.…”

Section: Introductionmentioning

confidence: 99%

“…37,43,44 The thermodynamic characteristics of the HNF and intermediates of its thermal decomposition as well as the rate constants of elementary reactions are crucial for modeling the complex combustion process. The different reactions in the proposed HNF combustion mechanisms 26,42,44,45 have been treated mainly qualitatively, based on the chemical intuition, by analogy to similar reactions and empirical correlations. The quantum chemical calculations are the most appropriate alternative for obtaining the thermodynamic and kinetic properties of HNF decomposition reactions.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Study of the Primary Processes in the Thermal Decomposition of Hydrazinium Nitroformate

Kiselev

Gritsan

2009

J. Phys. Chem. A

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The primary reactions of the thermal decomposition of hydrazinium nitroformate (HNF) as well as ammonium nitroformate (ANF) were investigated theoretically using the G3 multilevel procedure. Calculations were performed for the reactions in the gas phase and in the melt using a simplified model of the latter. The influence of the melt on the reaction barriers was taken into account by calculation of the solvation free energies using a PCM model. In contrast with many other energetic salts, the ionic salt structures of the HNF and ANF were found to be minima on the PES. However, the most energetically favorable structures of the HNF and ANF in the gas phase are H-bonded complexes. In the melt, on the contrary, the ionic structure is lowest in free energy because of solvation effects. In both the gas phase and melt, the HNF decomposes preferably to nitroform and hydrazine. This fact agrees well with the experimentally observed absence of HNF among the gas-phase decomposition products. Thermolysis of HNF occurs mainly through the intermediacy of nitroform; computations do not support the suggestion that the aci-nitroform is an important intermediate of HNF thermolysis. The primary dissociation reactions of ANF resemble those of the HNF.

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical Study of the Primary Processes in the Thermal Decomposition of Hydrazinium Nitroformate

Kiselev

Gritsan

2009

J. Phys. Chem. A

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“…The temperature sensitivity was found to be a p~0 .12%/K, comparable to that of HMX and RDX, and about half the value of ADN's temperature sensitivity. The low pressure and sub-atmospheric regression was studied by Louwers et al [15]. Self-sustained combustion was obtained at pressures as low as 0.03 MPa.…”

Section: Williamsmentioning

confidence: 99%

Combustion of hydrazinium nitroformate based compositions

Louwers¹,

Gadiot²,

Versluis

et al. 1998

34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

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“…[4,5]. After this guugingof the model, the regression rate is calculated at different pressures, without modification of any of the other parameters.…”

Section: X+-w (4)mentioning

confidence: 99%

A model for steady-state HNF combustion

Louwers¹,

Gadiot²,

Brewster³

et al. 1997

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A simple model for the combustion of solid monopropellants is presented. The condensed phase is treated by high activation energy asymptotics. The gas phase is treated by two limit cases: high activation energy, and low activation energy. This results in simplification of the gas phase energy equation, making an (approximate) analytical solution possible. The results of the model are compared with experimental results of Hydrazinium Nitroformate (HNF) combustion.

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Steady state HNG combustion modeling

Cited by 3 publications

References 12 publications

Theoretical Study of the Primary Processes in the Thermal Decomposition of Hydrazinium Nitroformate

Theoretical Study of the Primary Processes in the Thermal Decomposition of Hydrazinium Nitroformate

Combustion of hydrazinium nitroformate based compositions

A model for steady-state HNF combustion

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