Registration of Shock-Induced Particle Fluxes by the Method of Pulse Axial Holography
M. V. Antipov, S. V. Erunov, A. V. Fedoseev, V. A. Ogorodnikov, D. N. Zamyslov, E. A. Chudakov
Nizhny Novgorod State Technical University n.a. R. E. Alekseev, Nizhny Novgorod, Russia
Keywords: shock wave, dusting, particle size, flow
Abstract
The problem of measuring particle size distribution in shock-induced flows is discussed. The design of a mobile holographic system developed by the authors, which implements the method of axial pulse holography, is presented. The system enables the acquisition of holograms with a field of view of approximately 20 mm in diameter and a depth of over 20 mm, and the recording of flows of lead particles ≥3-5 μm in size, moving at velocities up to approximately 2 km/s. Examples of shock-induced flows moving in a vacuum, recorded using the mobile holographic system, are presented. These flows consist of both individual particles 5-100 μm in size and, predominantly, filamentary formations 3-10 μm thick. Methods of analog and digital recording and reconstruction of holograms are discussed, as well as the problem of identifying particles in images reconstructed from recorded holograms.
|
