Development of methods for the characterization and uncertainty assessment of turbulent properties in high speed compressible flows, by hot wires and fast response pressure probes
(2021)
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- Authors
- Supervisors
- Arts, Tony
- Abstract
- The experimental characterization of turbulence is a challenging task, as demanding measurements are required in terms of quality and resolution. This task is even more challenging in high speed and complex flows like turbomachinery flows, due to the limitations of measurement techniques in such environments. In this context, the goal of this thesis is to develop a series of methods for improved turbulence measurements in challenging flow environments, typical of industrial applications. The focus is placed on intrusive measurement techniques which are of wide application in both industry and academia: Constant Temperature Hot Wire Anemometry and fast response pressure probes. The aforementioned techniques have been analyzed in terms of calibration, application and post-processing methods with the aim of reducing measurement errors. Particular focus has been placed on the techniques’ dynamic response. The development of an uncertainty quantification methodology for turbulence measurements is another main contribution in this work. It takes into account both the measurement uncertainty and the statistical uncertainty budgets and it can provide the evaluation of confidence intervals for all quantities of interest. Finally, two test cases are presented, showcasing the implementation of some of the developed concepts in a practical application and demonstrating the performance of turbulence measurements in a complex environment, also in terms of data reduction and processing methodologies.
- Affiliations
Citations
Boufidi, E. (2021). Development of methods for the characterization and uncertainty assessment of turbulent properties in high speed compressible flows, by hot wires and fast response pressure probes. https://hdl.handle.net/2078.5/116958