Titlebook: Ram Accelerators; Proceedings of the T K. Takayama,A. Sasoh Conference proceedings 1998 Springer-Verlag Berlin Heidelberg 1998 Normal.compu

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High acceleration experiments using a multi-stage ram accelerator50 gm) projectile geometry was developed that can be reliably accelerated up to the Chapman-Jouguet detonation speed of the propellant in a 38 mm bore ram accelerator. Experiments were performed in CH./O./He propellants wherein Mach number and heat release of combustion were varied to obtain very hi

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RAMAC in subdetonative propulsion mode: State of the ISL studies ram tube is a smooth cylindrical bore, filled with a dense gaseous reactive mixture in which is injected a supersonic under-calibrated projectile. The mixture composition and projectile shape are two key-elements for the success of the ram process. Composed preferably by an axisymmetric biconical b

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Presentation of the rail tube version II of ISL’s RAMAC 30ccelerator, has generated considerable interest over the last years in different countries. In Prance, ISL has performed among other experiments in a 30-mm-caliber ram accelerator, called RAMAC 30, mainly at superdetonative flight speeds. As accelerator tube a ram-tube equipped with rails for guidin

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The behaviour of fin-guided projectiles superdetonative accelerated in ISL’s RAMAC 30ube closed at its ends by diaphragms, the ram accelerator, has generated considerable interest over the last years in different countries: especially in the United States, Israel, Japan, Prance and others. In Prance, the ISL performed, among others, experiments in a 30-mm-caliber ram accelerator, ca

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Ignition study for low pressure combustible mixture in a ram acceleratoriversity to study the ignition process under a sub-detonative condition. Because of the low fill pressure (around 0.5MPa) in ram acceleration section, it’s hard to ignite the premixed combustible gas which has the appropriate mixing ratio to keep the combustion behind the projectile in thermal choki

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Thermally choked operation in a 25-mm-bore ram acceleratorotal length of the ram acceleration tube is 6 m. It uses a powder gun as a pre-accelerator. The propellant mixture is supplied through a system composed of mass flow controllers and backpressure regulators. Pressure signals are recorded through multiplexer systems, thereby saving the number of chann

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37-mm bore ram accelerator of CARDCly-choked mode) has been demonstrated, and projectiles are accelerated from 1,100 m/s to 1,450 m/s through a 4.8m-long accelerator, with averaged acceleration ranging from 7,000 to 11,000 g. Description of this 37-mm ram accelerator facility is given in this paper, together with typical results of c

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