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Evaluation of Turbulence Statistics from Engine Cooling Fan Velocity Measurements
Technical Paper
2001-01-1710
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The present communication reports on processing and interpreting velocity measurements in the wake of a cooling fan. Velocity data are typically phase averaged to create statistics that would be observed in a rotating frame of reference. The difference between any given instantaneous measurement and the phase mean value is often referred to as the fluctuating component of velocity. These deviations can be caused by a variety of mechanisms (blade vibration for example) and do not necessarily represent “turbulence”. A different approach using an eigenfunction decomposition of the data is used on a sample data set to help distinguish between cycle-to-cycle variations and turbulence.
Authors
Citation
Morris, S., "Evaluation of Turbulence Statistics from Engine Cooling Fan Velocity Measurements," SAE Technical Paper 2001-01-1710, 2001, https://doi.org/10.4271/2001-01-1710.Also In
References
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- Holmes, Lumley, and Berkooz, 1996, Turbulence, Coherent Structures, Dynamical Systems and Symmetry, Cambridge University Press, London.
- Morris, S.C., 1997 Masters Thesis, Department of Mechanical Engineering, Michigan State University.
- Morris,S.C., Foss, J.F., 1998, Velocity Measurements in the wake of an automotive cooling fan, Experimental Thermal and Fluid Science, V17, pp100-106.
- Stakgold, I., 1979, Green's Functions and Boundary Value Problems, John Wiley & Sons, Inc., New York.