Session Hj - Shocks, Combustion & Hypersonic Flows.
ORAL session, Tuesday, November 25
310, Moscone Center
Experiments have been conducted to examine the dependence of particle removal from a surface on the impingement angle and height above the surface of the exit of a small shock tube. Minute particles of polystyrene (<10\mu m diameter) were manufactured and deposited on freshly cleaned glass substrates by gravitational settling. Dark field microscopy in conjunction with image processing is used to determine the extent of particle removal resulting from each firing of the shock tube. The removal threshold and angular distribution of shock strength are determined by curve fits of a hemispherical-shock model to the particle removal data.