Free Surface Turbulence.
Abstract
When turbulent jets or wakes interact with a free surface, the turbulent eddies are apparently damped in the vertical direction and extended in the horizontal direction. Turbulent velocities are being measured for this zone of interaction to enable verifying turbulence modelling techniques. A two-dimensional jet is formed by pumping water through a rectangular slit into a channel filled with still water. Hot-film anemometry techniques measure velocity fluctuations in the jet and in the immediate neighborhood outside the jet. Some effects of jet flow rate and jet submergence have been studied. The raw data are sampled time records of the anemometer output voltages obtained at different positions in the jet. These time records together with the sensor calibration information are analyzed using digital signal processing techniques. The mean velocities, turbulence intensities, and velocity correlation functions are being calculated, and the results used to develop a two-point closure scheme and a mathematical model for jet flow turbulence.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1986
- Accession Number
- ADA168013
Entities
People
- D. W. Hubbard
- G. Trevino
Organizations
- Michigan Technological University