Analysis of the uncertainties in velocity measurements with triple hot-wire probes
Abstract
A detailed computerized sensitivity analysis of the triple hot-wire equations has been performed in order to delineate the uncertainties associated with measurements of the velocity components. Absolute and relative uncertainties for the instantaneous hot-wire outputs are calculated as functions of roll and pitch angles, based on a constant probability combination of the uncertainties in the inputs. From the results, it is concluded that the small inherent difficulties associated with the triple hot-wire data do not reflect artifacts introduced by the data processing. Fixed errors present in the V and W channels of the output are due to the nonzero measuring volume of the triple wire probe, and are entirely predictable.
- Publication:
-
Heat and Mass Transfer in Rotating Machinery
- Pub Date:
- 1984
- Bibcode:
- 1984hmt..book..293F
- Keywords:
-
- Hot-Wire Anemometers;
- Velocity Errors;
- Velocity Measurement;
- Calibrating;
- Matrices (Mathematics);
- Orthogonal Functions;
- Stochastic Processes;
- Fluid Mechanics and Heat Transfer