Results 61 to 70 of about 233 (99)

Development of hydrazinium nitroformate based solid propellants

31st Joint Propulsion Conference and Exhibit, 1995
The development of new high-performance propellant combinations requires the establishment of safety and handling characteristics and thermodynamic decomposition and explosive properties. This paper addresses the early development phases of a new composite solid propellant based on HNF as oxidizer and GAP as an energetic binder.
Schöyer, H.F.R., Schnorhk, A.J., Korting, P.A.O.G., Lit, P.J. van, Mul, J.M., Gadiot, G., Meulenbrugge, J.J.   +6 more
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Denitration of hydrazinium nitroformate to form hydrazinium dinitromethanide

New J. Chem., 2014
Thermally unstable hydrazinium dinitromethanide was synthesized by denitration of hydrazinium nitroformate with hydrazine hydrate and fully characterized using IR, Raman and multinuclear (1H, 13C, 15N) NMR spectroscopy, and single crystal X-ray diffraction as well as thermal, impact and friction stability measurements.
Young-Hyuk Joo, Byoung Sun Min
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Steady-State Hydrazinium Nitroformate (HNF) Combustion Modeling

Journal of Propulsion and Power, 1999
Two simplified modeling approaches are used to model the combustion of hydrazinium nitroformate (HNF), N2H5·C(NO2)3. The condensed phase is treated by high-activation-energy asymptotics. The gas phase is treated by two limit cases: the classical high-activation-energy approximation and the recently introduced low-activation-energy approach.
Louwers, J., Gadiot, G.M.H.J.L., Brewster, M.Q., Son, S.F., Parr, T., Hanson-Parr, D.   +5 more
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Overview of the Development of Hydrazinium Nitroformate

Journal of Propulsion and Power, 2002
Hydrazinium nitroformate (HNF) has been under renewed development since the late 1980s. These research and development efforts have demonstrated that it is possible to produce HNF crystals with acceptable morphology and stability. Although the production of HNF is based on a simple acid-base reaction, the resulting product strongly depends on the ...
Schöyer, H.F.R., Welland-Veltmans, W.H.M., Louwers, J., Korting, P.A.O.G., Heijden, A.E.D.M. van der, Keizers, H.L.J., Berg, R.P. van den   +6 more
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Decomposition and flame structure of hydrazinium nitroformate

37th Aerospace Sciences Meeting and Exhibit, 1999
The decomposition of hydrazinium nitroformate (HNF) was studied in a hot quartz cell and by dropping small amounts of HNF on a hot plate. The species formed during the decomposition were identified by ultraviolet-visible absorption experiments. These experiments reveal that first HONO is formed. The HONO formation is followed by formation of NO2. NO is
Jeroen Louwers, Tim Parr, Donna Hanson-Parr   +2 more
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Selection of burning rate modifiers for hydrazinium nitroformate

Combustion and Flame, 2012
Species including N2H4, NH3 and N2O are known to be present near the surface of burning hydrazinium nitroformate (HNF). In this paper, planar laser induced fluorescence from the near surface region of burning HNF pellets is reported indicating the presence of NO2. These four species are formed in the upper (foamy) layer of the solid phase.
Tummers, M.J., Heijden, A.E.D.M. van der, Veen, E.H. van   +2 more
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Characterization and Thermal Analysis of Hydrazinium Nitroformate (HNF)

Journal of Energetic Materials, 2003
This paper reports studies undertaken on hydrazinium nitroformate (HNF) synthesized in HEMRL by a viable method. The purity of the synthesized HNF was determined by high-performance liquid chromatography, and the compound was characterized by elemental analysis, ultraviolet, infrared, nuclear magnetic resonance ( 1 H NMR and 13 C NMR), and electron ...
P. S. Dendage, D. B. Sarwade, A. B. Mandale, S. N. Asthana   +3 more
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Model for Nonlinear Transient Burning of Hydrazinium Nitroformate

Journal of Propulsion and Power, 1999
Transient burning of solid propellants is a topic that still contains a large number of questions. The transient burning of neat hydrazinium nitroformate is calculated within the quasi-steady gas-phase, homogeneous one-dimensional condensed phase approach.
Jeroen Louwers, Guy M. H. J. L. Gadiot
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Hydrazinium nitroformate (HNF) and HNF based propellants: A review

Journal of Energetic Materials, 2001
Abstract This paper reviews the studies carried out so far on HNF, which is emerging as potential oxidizer for futuristic propellant systems. Methods of synthesis of HNF including efforts to obtain HNF of desired particle size/shape have been discussed in detail.
P. S. Dendage, D. B. Sarwade, S. N. Asthana, H. Singh   +3 more
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Condensed phase decomposition and gas phase combustion of hydrazinium nitroformate

Combustion and Flame, 2009
This paper presents the results of a series of experiments on the condensed phase decomposition and the gas phase combustion of hydrazinium nitroformate (HNF). The experiments include SEM analysis of quenched samples that showed evidence of the formation of a foam layer.
Dragomir, O.E., Tummers, M.J., Veen, E.H. van, Heijden, A.E.D.M. van der, Roekaerts, D.J.E.M.   +4 more
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