Shock wave ignition of aluminum particles
Web1 Aug 2002 · In this paper a criterion to predict ignition delay time is proposed that the aluminum particles can be ignited behind shock waves at the melting point of aluminum … WebTo predict the influence of aluminum contents particle size <20 m on the shock initiation and growth of reaction in an aluminized explosive CL-20/AL/Binder, 85/15/5, a new numerical model is utilized. The model is based on the elastic-visco-plastic ...
Shock wave ignition of aluminum particles
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Webburning rate pressure exponent compared to neat NM, while mixtures of aluminum particles alone show a significant increase. Failure diameters of mixture detonations are found to vary significantly as a function of 38 nm aluminum particle loading, reducing more than 50% from that of neat nitromethane with 12.5% (by mass) aluminum loading.
WebThe results from Xe flash ignition and laser-based excitation experiments demonstrate that GO is an efficient additive to improve the energetic performance of micron-sized Al particles, enabling ... Web1 Dec 2000 · Small crystalline boron particles (1-15 (J,m) in a pure oxygen atmosphere are ignited at the endwall of a high pressure (8.5 atm) shock tube to study the effect of particle size on ignition delay… 43 Experimental study of stages in aluminium particle combustion in air E. Dreizin Physics, Environmental Science 1996 226 View 2 excerpts
Web17 May 2012 · Ignition of powders of aluminum hydride and metal aluminum hydrides behind reflected shock waves 6 August 2011 High Temperature, Vol. 49, No. 4 … In this paper, we present results from spontaneous ignition of aluminium particle clouds in a series of shock tube experiments. For all experiments, the shock propagates along a narrow pile of 40- \upmu m aluminium particles. The study includes shock Mach numbers in the range from 1.51 to 2.38. See more Pressure sensors are mounted in the ceiling of the driver, driven, and window sections, with their distances given relative to the left-hand driver wall (Table 1). … See more For all 30 experiments, approximately 1000 images are generated from each of the two high-speed video cameras. This leaves an extensive amount of data to be … See more The second high-speed video camera is used as a dark-film camera to capture the particle ignition and burning. The dark-film setup uses an exposure time of … See more
Web1 Apr 2001 · Aluminum particles, ∼9.6 μm, were ignited and burned in shocked atmospheres of Ar and varying amounts of H 2 O, CO 2, and O 2 at the endwall of a shock tube to study …
WebParticle image velocimetry (PIV) is an optical method of flow visualization used in education and research. It is used to obtain instantaneous velocity measurements and related properties in fluids.The fluid is seeded with tracer particles which, for sufficiently small particles, are assumed to faithfully follow the flow dynamics (the degree to which the … unsteady definitionWeb1 Jan 2002 · The ignition of aluminum particles behind shock waves is analyzed with three different criteria. Ignition delay time with different Mach number of incident shock waves … recipes with knorr vegetable soup mixWeb1 Aug 2002 · The ignition of aluminum particles behind shock waves is analyzed with three different criteria. Ignition delay time with different Mach number of incident shock waves … unsteady diffusion equationWeb10 Mar 2024 · The ignition of combustible material by contact with hot metal particles is an important pathway by which wildland and urban spot fires are started. This work examines how fuel characteristics such as density, morphology and chemical composition effect the ability of the fuel to be ignited by a hot metal particle. Fuels were prepared out of three … unsteady feelingWeb1 Aug 2024 · To improve the combustion efficiency of widely used micro-aluminum (μAl) particle, enhancing its ignition and combustion performances is a critical issue via breaking through the intrinsic Al 2 O 3 layer covering the Al-core. This study proposed a facile in-situ ‘one-pot’ electroless plating method to functionalize the surface of μAl particles with … recipes with lady boss leanWebAluminum dust ignition behind reflected shock wave: two-dimensional simulations To cite this article: Krzysztof Benkiewicz and A Koichi Hayashi 2002 Fluid Dyn. Res. 30 269 View … recipes with korean gochujangWebignition of aluminum particles in acontinuum approximation, the temperature behind the shock wave formed in front of the particle in the supersonic flow behind the transmitted shock wave should not be used as the characteristic temperature. For nickel particles, which have a low specific heat,the velocity relaxation timeexceeds unsteady gait cks