Ultrasonic Atomisation,Viruses,Organic Components,Proteins,Atomise Bacteria,Supersonic Nozzles,Sonic Generators,Supersonic Nozzle System

Ultrasonic Atomisation

	Ultrasonic Atomisation Ultrasonics are capable of atomising water droplets, and in theory could atomise bacteria, which contain, or are contained in water. Viruses, which are either contained within droplets of water or have organic components such as DNA, RNA or proteins, should also be atomisable. Two methods by which this maybe accomplished are (a) supersonic nozzles and (b) sonic generators.
a. If the airstream is forced through a supersonic nozzle, a standing shock wave develops at the nozzle outlet. This shock wave dissipates energy by imparting it to the airstream, causing it to expand suddenly and rapidly. This results in the atomisation, or reduction to gas, of all bio-aerosols in the airstream. The fan power or pumping power required to accomplish this however, would be considerable.
b. The sonic generator (Fig. 13.10) essentially a high-power speaker and amplifier, tuned to resonate within the ductwork cavity, would create a standing shock wave through which the airstream would pass, and in which atomisation of any bio-aerosol would occur. Both this and the supersonic nozzle system would require a sound insulated ductwork section with inlet and outlet silencers.