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Measurement of Turbulent Pressure and Temperature Fluctuations in a Gas Turbine CombustorThe present research concerns the development of high-frequency pressure and temperature probes and related instrumentation capable of performing spectral characterization of unsteady pressure and temperature fluctuations over the 0.05 20 kHz range, at the exit of a gas turbine combustor operating at conditions close to nominal ones for large power generation turbomachinery. The probes used a transient technique pioneered at Oxford University; in order to withstand exposure to the harsh environment the probes were fitted on a rapid injection and cooling system jointly developed by Centrospazio CPR and Syracuse University. The experimental runs were performed on a large industrial test rig being operated by ENEL Produzione. The achieved results clearly show the satisfactory performance provided by this diagnostic tool, even though the poor location of the injection port prevented the tests from yielding more insight of the core flow turbulence characteristics. The pressure and temperature probes survived several dozen injections in the combustor hot jet, while consistently providing the intended high frequency performance. The apparatus was kept connected to the combustor during long duration firings, operating as an unobtrusive, self contained, piggy-back experiment: high frequency flow samplings were remotely recorded at selected moments corresponding to different combustor operating conditions.
Document ID
20030106574
Acquisition Source
Headquarters
Document Type
Contractor Report (CR)
Authors
Passaro, Andrea (Centrospazio Pisa, Italy)
LaGraff, John E. (Syracuse Univ. NY, United States)
Oldfield, Martin L. G. (Oxford Univ. Oxford, United Kingdom)
Biagioni, Leonardo (Centrospazio Pisa, Italy)
Moss, Roger W. (Newcastle-upon-Tyne Univ. Newcastle, United Kingdom)
Battelle, Ryan T. (Syracuse Univ. NY, United States)
Povinelli, Louis A. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
September 1, 2003
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
NASA/CR-2003-212540
E-14106
NAS 1.26:212540
Funding Number(s)
CONTRACT_GRANT: NAG3-2419
WBS: WBS 22-710-10-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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