It is shown that air bubbles of a certain size may be used to measure the fluctuating pressure in a liquid jet. The conditions under which these bubbles accurately reflect the local static pressures are described in detail; the volume shape of the bubbles was determined by holography for a 3.17 mm jet and the change in volume is interpreted as a result of the fluctuating pressure. The experimental results revealed that at any one instant, a wide spectrum of static pressure fluctuation intensities exist in the jet. It was also found that the probability distribution of these intensities has a slightly skewed bell shape distribution and that the fluctuating static pressure peaked at a higher positive value than a negative one.
The Utilization of Specially Tailored Air Bubbles as Static Pressure Sensors in a Jet
K. K. Ooi
Able Corporation, Anaheim, Calif.
A. J. Acosta
California Institute of Technology, Pasadena, Calif.
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Ooi, K. K., and Acosta, A. J. (December 1, 1984). "The Utilization of Specially Tailored Air Bubbles as Static Pressure Sensors in a Jet." ASME. J. Fluids Eng. December 1984; 106(4): 459–464. https://doi.org/10.1115/1.3243147
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