A multi-sensor hot-wire probe to measure vorticity and velocity in turbulent flows
Abstract
The design and construction of a miniature hot-wire probe capable of measuring simultaneously all components of the velocity and vorticity vectors in turbulent flows are presented. Details about the probe resolution and calibration as well as the Newton-Raphson algorithm used to solve the cooling equations are given. Preliminary testings indicate that an accuracy of 2 to 10 percent on velocity components may induce errors ranging from 2 to 30 percent on the measured rms of vorticity fluctuations. The probe performance in a turbulent boundary layer is evaluated by comparing the measurements of all three velocity and streamwise vorticity components to data available in the literature. Satisfactory results indicate that the probe operates properly and that it is adequate to measure vorticity.
- Publication:
-
Symposium on Thermal Anemometry
- Pub Date:
- 1987
- Bibcode:
- 1987syta.proc...57V
- Keywords:
-
- Hot-Wire Anemometers;
- Turbulent Boundary Layer;
- Velocity Measurement;
- Vorticity;
- Calibrating;
- Construction;
- Heat Transfer Coefficients;
- Newton-Raphson Method;
- Fluid Mechanics and Heat Transfer