超音波印加による幅の狭い伝熱面の伝熱促進に関する研究
1993 年 59 巻 563 号 p. 2232-2237
詳細
1993 年 59 巻 563 号 p. 2232-2237
Ultrasonic enhancement of heat transfer on a narrow surface was measured by changing the width of the surface from 8 to 0.1 mm. Ultrasonic power of 600 W with a frequency of 40 kHz was used. Heat transfer on the narrow surface without ultrasonic vibration was correlated by means of the experimental equation for thin wire. The cavitation intensity was measured by means of the cavitation erosion loss of aluminum foil of 15μm thickness. The effects of acoustic streaming and cavitation were separated by this measurement. Heat transfer by acoustic streaming was predicted through the forced convection. Enhancement by cavitation was explained by the turbulence heat conductivity of the microjets.
