Synthetic jet applied to detect potential terrorists

Authors performed hot-wire anemometer investigations of the aerodynamics of an actuator designed to generate annular synthetic jets reaching to very large distances. The actuator is to be used for detecting illegal substances – and thus identifying terrorists and criminals who recently came into contact with explosives or drugs. It is designed to generate the synthetic jet with an annular cross section, thus creating between the nozzle exit and the cloth surface a space that is separated from the surrounding atmosphere in which in the present air-jet designs in detector the substance traces become diluted. The main problem encountered, because of the variability of the examined persons, is the need to reach to very large distances.