A new method of determining the flow field with low and high turbulence intensity
Abstract
An improved method of analyzing hot-wire signals is presented for determining the time-averaged velocity vector and the Reynolds stresses for one- and multi-dimensional flows using the well-known zero-method or streamline-based approach. In this instance, the 'moving' probe must be oriented for every point of measurement in the direction of the time-averaged velocity vector. The improved method has the advantage of being applicable to the hot-wire anemometers in common use and to commercially available probes for investigating the time-averaged flow field and the six components of the Reynolds stress tensor. Errors arising due to incorrect positioning of the hot wire with respect to the mean flow direction are discussed. Other types of errors are also discussed.
- Publication:
-
Turbulent Boundary Layers: Forced, Incompressible, Non-Reacting
- Pub Date:
- 1979
- Bibcode:
- 1979tblf.proc..169A
- Keywords:
-
- Flow Velocity;
- Hot-Wire Anemometers;
- Signal Analysis;
- Turbulent Flow;
- Instrument Errors;
- Reynolds Stress;
- Shear Stress;
- Weighting Functions;
- Fluid Mechanics and Heat Transfer