Accession Number:

AD0818402

Title:

ON THE EFFECT OF VIBRATIONS ON NUCLEATE BOILING HEAT TRANSFER AT NEAR SATURATED CONDITIONS.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

• Macpherson, John Charles

Report Date:

1967-06-01

Pagination or Media Count:

60.0

Abstract:

An experimental investigation was performed to determine the effects of vibrations on nucleate boiling heat transfer rates. Transverse harmonic vibrations up to 2000 cps were applied to a one-half inch wide Nichrome 5 heater mounted on a 1.25 x 9.0 inch phenolic cylinder. Large improvements in h were obtained at low qA. However, as the heat flux was increased to approximately 150,000 Bhr sq ft, the improvement diminished to zero, or, in some instances, even a slight degradation. The maximum attainable h for heat fluxes below 150,000 Bhr sq ft occurred at 40 cps. It was nearly equal to the maximum attainable h due to forced convection as reported by McAdams. Author

Descriptors:

• (*HEAT TRANSFER
• VIBRATION)
• (*NUCLEATE BOILING
• HEAT TRANSFER)
• EXPERIMENTAL DATA
• CYLINDRICAL BODIES
• HEATERS
• STAGNATION POINT
• CONVECTION(HEAT TRANSFER)
• OPTIMIZATION
• THESES

Subject Categories:

• Mechanics
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE