The measurement of flow velocity distribution in fluids
Abstract
A method for the ultimate improvement, in range and accuracy, of the cross-correlation flowmeter is investigated. The principles on which the flowmeter operates and fundamental digital signal-processing techniques are reviewed, and the process of the Fourier-transform deconvolution of the auto-correlation and cross-correlation functions is investigated. Simulation of the flow system on a computer is shown to require impracticable amounts of computer time to achieve the necessary convergence of the correlation funtions. Consequently, correlations and measurements of velocity profiles are made on an experimental flow rig.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1982
- Bibcode:
- 1982STIN...8316709D
- Keywords:
-
- Flow Distribution;
- Flowmeters;
- Velocity Distribution;
- Accuracy;
- Autocorrelation;
- Computerized Simulation;
- Cross Correlation;
- Fourier Transformation;
- Signal Processing;
- Fluid Mechanics and Heat Transfer