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Study of the Effect of a Closed-End Side Branch on Sinusoidally Perturbed Flow of Liquid in a Line (1963)

Dorsch, Robert G. ; Blade, Robert J. ; Lewis, William

In: CASI

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Publication Date: 2019-08-14

Description: Classical undamped acoustic-wave theory was used to determine analytical relations among sinusoidal perturbations of pressure and flow at the ends of a hydraulic-transmission line having a closed-end branch of arbitrary length attached at an arbitrary point. Experimental data were obtained for the equilateral case (a branch half as long as the main line connected to the main line at the midpoint) at mean flow speeds of 5 to 10 feet per second. Measured pressure-perturbation ratios agreed closely with analytical predictions. As frequencies for which the branch length was an odd multiple of 1/4 wavelength, waves in the main line were almost completely reflected at the junction point.

Keywords: Fluid Mechanics and Thermodynamics

Type: NASA-TN-D-1876 , E-2036

Format: application/pdf

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