摘要：Abstract The effect of ultrasonically generated forced convention on heat distribution in gaseous medium was experimentally investigated. In the experiment, as an ultrasound source, a piezoelectric transducer which has 28 KHz resonance frequency was used. Transducer was placed behind heat source and ran in sweeping mode from frequency 28 985Hz to 27 397Hz at about 20W power. 50Ω chrome-nickel resistance heater wire of a hairdryer was used under 220V AC voltage as a heat source and its power is adjusted about 100W by a dimmer. The experiments were carried out two set-ups; one of them is in open environment and other is indoor environment. To observe distribution of heat that is generated by heat source, thermal distribution on A3 sized paper that was placed in test environment was monitored by FLIR A20 thermal camera. When both heat source and fan with heat source were running, the heat distributions induced by ultrasound were compared with that of other. It can be concluded that ultrasonic waves could have a positive effect on heat distribution in gaseous medium and it carries heat in propagating direction of itself.
