The Acoustic Drying Of Cloth In Drum-Type Washing Machines

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Cavitation • The acoustic cavitation arises in liquid during propagation high- intensity acoustic wave. • The cavitation is a key driving force, that speeding-up many physiochemical processes in acoustic fields, includes drying process. • The cavitation connects with liquid continuousness violation in decreased pressure phase, arising vapor-gas bubbles in gaps and its collapsing in next increasing pressure phase. • When the bubble collapsing, on account of bubble skewness, , arises a jet stream that excite micro shock wave in liquid Increased pressure Decreased pressure Decreased pressure SHOCK WAVES Increased pressure Increased pressure Decreased pressure 10
Cavitation Atomizing Of Liquid • Collapsing of cavitation bubbles near free surface excites capillary-gravitation waves. Wave crests splints up to little drops. • Detached drops make up an aerosol. When other influences (e.g. air flows) are absent the aerosol is in equilibrium. • The air flows, acoustic flows and radiation pressure provides effective removing of aerosol from surface. • Cavitation atomizing provides water removal without evaporation. It decreases power consumption of drying process • Cavitation atomizing arises only in conditions of high cloth humidity (more than 60%) and high- intensity ultrasound – more that 160 dB. • For the cloth drying in washing machines cavitation atomizing is limited applicable Cavitation Water aerosol Capillarygravitation waves aerosol 11
Page 1 and 2: Acoustic Processes and Devices Lab
Page 3 and 4: Conceptions Of Acoustic Drying Phys
Page 5 and 6: Pressure Differences Above Surface
Page 7 and 8: Microflows Near Obstacle • When t
Page 9: Radiation Pressure Radiation pressu
Page 13 and 14: Pulsation And Explosion Of Vapor-ga
Page 15 and 16: Calorific Effect • Absorption of
Page 17 and 18: Industrial Applications Of Acoustic
Page 19 and 20: Industrial Tunnel-type Acoustic Dry
Page 21 and 22: Contact-Type Acoustic Dryers • In
Page 23 and 24: The Acoustic Drying Of Cloth In Dru
Page 25 and 26: Action Of Gas-Jet Radiator To Wet M
Page 27 and 28: Operation Principle Of Piezoelectri
Page 29 and 30: Piezoelectric-Type Radiator Key fea
Page 31 and 32: Electronic Generator Electric Power
Page 33 and 34: Test Procedure • Testing and comp
Page 35 and 36: Selecting Radiator Type Feature Gas
Page 37 and 38: Second Mock-up, Based On LG WD14124
Page 39 and 40: Testing Soundproofing System Scheme
Page 41 and 42: Experimental Results (11 kg of clot
Page 43 and 44: Experimental Results (11 kg of clot
Page 45 and 46: Optimal Drying Conditions Selecting
Page 47: Conclusion • 1. The integration o

The Acoustic Drying Of Cloth In Drum-Type Washing Machines

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