Acoustic waves in gases with strong pressure gradientsThe effect of strong pressure gradients on the acoustic modes (standing waves) of a rectangular cavity is investigated analytically. When the cavity response is represented by a sum of modes, each mode is found to have two resonant frequencies. The lower frequency is near the Viaesaela-Brundt frequency, which characterizes the buoyant effect, and the higher frequency is above the ordinary acoustic resonance frequency. This finding shows that the propagation velocity of the acoustic waves is increased due to the pressure gradient effect.
Document ID
19890046357
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zorumski, William E. (NASA Langley Research Center Hampton, VA, United States)