Accession Number:

ADA273846

Title:

Hydrodynamics, Acoustics and Scaling of Traveling Bubble Cavitation

Descriptive Note:

Master's thesis,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA DIV OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

Report Date:

1993-09-24

Pagination or Media Count:

193.0

Abstract:

Recent observations of the geometries of growing and collapsing bubbles over axisymmetric headforms have revealed the complexity of the microfluidmechanics associated with these flows. Among the complex features observed were bubble to bubble interaction, cavitation noise generation and bubble interaction with the boundary layer which leads to the shearing of the underside of the bubble and alters the collapsing process. All of these previous tests were performed on small headform sizes. The focus of this research is to determine the dynamics governing the growth and collapse of traveling bubbles and to analyze the scaling effects due to variations in geometry size, Reynolds number and cavitation number. For this effect, cavitating flows over Schiebe headforms of different sizes 5.08 cm, 25.4 cm and 50.8 cm in diameter were studied in the David Taylor Large CAvitation Channel LCC. This thesis presents the scaling effects captured on high-speed film and electrode sensors as well as the noise signals generated during the collapse of the cavities.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE