ID#: 19
Abstract Title: Generation of Particle Clouds by means of Pressurized Gas and Gas Generators
Session Title: Poster Session I
Session Date: 7/31/01
Session Start Time: 2:50 PM
Contributing Author: Schneider, H.
Organization: Fraunhofer Institut f¸r Chemische Technologie
Country: Germany
Authors: Helmut Schneider, Norbert Eisenreich
Short Abstract: The controlled release and dispersion of µm sized particles into the surrounding atmosphere is of interest in several research projects at ICT: further development of fuel air explosive systems for conventional application and eventually as a defence system against B- and C- weapons, non-lethal weapons systems, investigation of dust explosions and development of fire extinguishing systems. Dependent on the type of application a particle cloud with special geometry and particle concentration within the cloud should be generated within a short time scale of a few milliseconds to about 100 ms. The basic idea is a realization by means of gas generators. These can be tailored for the special application with respect to for example burning velocity, -temperature, and gas output; together with an appropriate design of the mechanical construction the generation of a well-defined cloud seems to be possible. Since there has to be done a large number of tests to clarify the correlation between the components of the whole system, tests have to be made on a small scale; however, since the dispersal of a large amount of mass may be different, tests on a realistic scale are also necessary. This paper reports on pretests with pressurized gas systems on two different scales. The initial pressures for the dispersal of masses in the range of 0.32 kg to 2.52 kg were 5 MPa and 10 MPa. The modeling of the propagation of the cloud with respect to geometry and volume can be achieved by simple assumptions.