Improved method for the measurement of turbulence quantities
Abstract
A simplified method for treating hot-wire anemometry digital data from highly turbulent flows is presented. The technique involves use of the square of the response equation before time averaging. A general three-dimensional flow is considered analytically, wherein the mean velocity components are determined, then squared, allowing the turbulence quantities to be obtained. The method is applied to the determination of turbulence intensities at 50 and 60 diameters from a jet nozzle 10 mm in diameter issuing a flow at 80 m/sec. Although the results were found to diverge from previous measurements (Wygnanski and Fiedler, 1969), the conditions of the experiment are noted to be slightly different. The method is useful for obtaining exact results, use of linearized operation allows consideration of high turbulent intensities, and the probes do not have to be oriented on the streamlines.
- Publication:
-
AIAA Journal
- Pub Date:
- January 1982
- DOI:
- 10.2514/3.7899
- Bibcode:
- 1982AIAAJ..20..148S
- Keywords:
-
- Data Processing;
- Digital Data;
- Flow Measurement;
- Hot-Wire Anemometers;
- Turbulent Flow;
- Axial Flow;
- Jet Flow;
- Linear Equations;
- Nozzle Flow;
- Three Dimensional Flow;
- Fluid Mechanics and Heat Transfer