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By Jon T Hoffman; Center of Military History

ISBN-10: 0160841879

ISBN-13: 9780160841873

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Extra resources for A history of innovation : U.S. Army adaptation in war and peace

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Detonation was observed at HMX and RDX burning in glass tubes, 8 to 12 mm diameter, 20 to 40 cm long, with the overall amount of explosive of the order of several grams [17]. Solution of differential equation UU" + (U')2 - kUa = 0 (l) allows to obtain a criterion of DDT in these conditions [17,18] (2) where x is the length of HE layer in the tube (when both ends of the tube are open it is a half of the length), U is the velocity of gas in the free space of the tube, Uo ':::: 20 - 30 m/s 25 is the critical velocity of the flow at which burning of the wall layer converts into burning of the particles in the free space of the tube, where ~ is the mean diameter of the burning particles, Urn is their mass burning rate, A is the width of the burning layer in the direction perpendicular to the tube axis, cre is the surface of the free cross-section, Pg is the density of the gas, b is the coefficient in a formula where m is the velocity of a process of the particles carrying away from the walls of channel ( m-2 S-I), a is equal 2 to 3_ When deriving formula (2), a = 3 was taken.

And Flame, 9, N 1,73-80. F. ). N. (1970) Method of estimation of HE Ability to DDT, in. Vzryvnoe Delo, N 65/25, M .. , Nedra, 149-158. , Okunev, V. E. ). , Price, D. (1974) Studies in the Transition from Deflagration to Detonation in Granular Explosives -I. Experimental Arrangement and Behavior of Explosives Which Fail to Exhibit Detonation, Comb. and Flame, 22, N 1, 111-118. R (1976) Deflagration to Detonation Transition Behavior of Tetryl, Proc. 6th Symp. on Detonation, 381-390. A. , Shock Waves, 21, N 3, 3-15.

As fire protection effects are mainly caused by water desorption process, we focus here on the brief description of thermodynamics of the water sorption on the SWS-IL. 2. 1. 5 mm grain size and used without additional purification. The confined "calcium chloride - silica gel" system was prepared by filling pores of the silica gel with 40 wt. % aqueous solution of CaCI 2 • Then the samples were dried at 200°C until their weight remained constant. %. A sorption equilibrium between water vapor and dry SWS-IL was studied by a thermal balance method [3,5].

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