Experimental Studies on the Interaction of Strong Sound Fields with Free Convection Boundary Layers
Experimental Studies on the Interaction of Strong Sound Fields with Free Convection Boundary Layers

Author: E. E. Soehngen

Publisher:

Published: 1960

Total Pages: 84

ISBN-13:

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Experiments have been conducted on the interaction of strong sound fields with freq convection boundary layers on horizontal heated cylinders of 0.750-inch diameter. The interaction effects were observed through the measurements of total heat transfer from the cylinders to air under the influence of different types of sound environments. Three different types of sound fields were employed for the experiments: (1) standing plane waves generated by loud-speakers in an anechoic chamber; (2) Traveling plane wave fields generated by a mechanical siren in an anechoic duct; (3) Constant pressure or diffuse sound fields generated by a mechanical siren in a reverberant chamber. In all cases the generated sound was monochromatic ...

The Effects of Resonant Acoustic Vibrations on the Local and Overall Heat Transfer Coefficients for Air Flowing Though an Isothermal Horizontal Tube
The Effects of Resonant Acoustic Vibrations on the Local and Overall Heat Transfer Coefficients for Air Flowing Though an Isothermal Horizontal Tube

Author: Thomas Woodrow Jackson

Publisher:

Published: 1960

Total Pages: 136

ISBN-13:

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Results are presented for a series of experiments conducted for the purpose of studying the local and overall effects of a resonant acoustic vibration on the heat transfer coefficient for air flowing through a constant temperature isothermal tube at Graetz Numbers from 33 to 5400. The local heat transfer coefficient is shown to vary periodically between the nodes and loops of the resonant sound wave. Local heat transfer coeffients up to 3.6 times the no-sound values have been obtained. Extensive tables of data are included for possible use in analytical investigations. Sound pressure levels to 162 decibels are reported.