2024 Shock wave ignition of aluminum particles

Shock wave ignition of aluminum particles

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Web1 Jul 2003 · In this work it is assumed that aluminum particles are ignited as their temperature reaches the melting point of aluminum and all of the aluminum of particles …

Theoretical study of shock wave ignition of aluminum …

Web7 Apr 2010 · For this purpose incident shock wave studies are appropriate. A horizontal shock tube was used to measure the heating and ignition delay times of small clouds of coal dust particles of size ranges 53 to 74, 37 to 53 and below 37 ..mu..m. Char and graphite particles were also tested to determine the influence of volatiles. Web1 May 2002 · Particles, blown away by the incident shock, are heated mainly behind the reflected shock wave. The estimated ignition delay time is of the order of 80– 100 μs and … on the dot mena

Characteristics and criteria of ignition of suspensions of aluminum …

WebIn 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 931.7K and all of … WebA mathematical model of ignition of a single aluminum particle under steady conditions is developed within the framework of Semenov's theory of thermal explosion. Based on this … WebFor condensed explosives, containing metal particle additives, interaction of the detonation shock and reaction zone with solid inclusions leads to high rates of momentum and heat transfer that consequently introduce non-ideal detonation phenomena. ion pgm 测序

The effect of a shock wave on the ignition behavior of aluminum ...

Web1 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 … Web1 Apr 2001 · Ignition delay and burning time data for ∼9.6 μm aluminum particles ignited within the shock tube in various mixtures of CO 2 /O 2 /Ar at T = 2635 ± 30 K and p = 8.7 ± 3.3 atm. Reflected shock wave conditions are listed in Table 2. ion pewter with toner on platinum hairIn 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 on the dot in spanish translation

"WebAluminum is a promising energy-containing material that can satisfy both aerospace and underwater thermodynamic propulsion systems.A high-temperature pressurized combustion chamber and a CO 2 laser were adopted to investigate the ignition and combustion characteristics of 2, 5, and 40 μm aluminum particles in a 1.0 MPa air–H 2 O–Ar mixed … " - Shock wave ignition of aluminum particles

Shock wave ignition of aluminum particles

Ignition of Aluminum Particles and Clouds (Conference) OSTI.GOV

Web1 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 … Web1 Sep 2003 · A computational method for the direct modeling of the aluminum particles ignition in detonation waves was created. Detonation wave propagates in hydrogen–air …

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Webpotential of using high-energy metal particles (aluminum, magnesium) or mixtures of reactive gases with additives of such particles as working media. The tasks, associated … WebSeveral workers have theoretically and experimentally studied the ignition and propagation of LSD wave away from the metal surfaces [24][25][26][27]. At high irradiance, the plasma is so hot that, prior to the arrival of the shock wave, the ambient gas is heated to temperatures at which laser absorption begins.…”

Webignition of aluminum particles as a function of particle size, oxidizer concentration and gas temperature. All these early studies focused on ignition of aluminum particles at stagnant … WebDOI: 10.1016/J.COMBUSTFLAME.2009.12.001 Corpus ID: 93356629; The effect of a shock wave on the ignition behavior of aluminum particles in a shock tube @article{Schlffel2010TheEO, title={The effect of a shock wave on the ignition behavior of aluminum particles in a shock tube}, author={Gunther Schl{\"o}ffel and Alfred Eichhorn …

Web1 Mar 1989 · The self-ignition and combustion of magnesium and aluminum powders was investigated photographically in an atmosphere of pure oxygen behind reflected shock waves. The experiments were conducted in ... 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 …

Web11 Nov 2024 · The ignition of Al nanoparticles after dispersion in air was analyzed using the previously described kinetic oxidation mechanism with the evaporation of clusters taken …

Web10 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 … ion phantom aceWeb1 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 … ion phaseWeb1 Dec 2024 · Laser ignition experimental system was used to analyze the effects of particle size and oxygen content on the sample ignition and combustion characteristics. As the … ion pgm 原理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 … on the dot wandWeb1 May 2002 · In Roberts et al. (1993), a shock tube was used to measure ignition delay times of aluminum and magnesium alloys, which are often used as ingredients of solid rocket propellants. In these experiments a small number of particles was accelerated and ignited by incident and reflected shock waves. on the dot olifantsfontein addressWeb1 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 … on the double clueWeb1 Mar 2010 · The effect of a shock wave on the ignition behavior of 5 μ m aluminum (Al) particles was studied in a series of experiments by means of a horizontal shock tube with … on the dot skip hire bradford