Experimental Fluid Dynamics and Uncertainty Assessment Methodology. S. Ghosh, M. Muste, F. Stern. Table of. Definition & purpose EFD philosophy EFD Process Types of measurements & instrumentation Measurement systems Uncertainty analysis 57:020 Laboratories. Experimental Fluid Dynamics.
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S. Ghosh, M. Muste, F. Stern
Experimental Fluid Dynamics: Use of experimental methodology and procedures for solving fluids engineering systems, including full and model scales, large and table top facilities, measurement systems (instrumentation, data acquisition and data reduction), dimensional analysis and similarity and uncertainty analysis.
A pretty experiment is in itself often more valuable than twenty formulae extracted from our minds." - Albert Einstein
Inclined tube manometer
A pressure transducer converts the pressure sensed by the instrument probe into mechanical or electrical signals
Elastic elements used to convert pressure within transducers
Transducer read out
Schematic of a membrane-based pressure transducer
Single and multi pressure taps
For an incompressible flow with no heat or work exchange, the mechanical energy equation can be written as
P0 = stagnation pressure
Pstat = static pressure
Volumetric flow rate
Principle of Load cell operation
connected to a common output.
and convert the magnitude of the analog signal into binary
providing a precise stream of pulses to the various system components.
actual flow into and out of the system.
enables bypassing the A/D converter of the DAS.
sending it to some other storage device.
Preprocessing deals with conditioning signals or optimizing signal
levels to obtain desired accuracies.
Effect of sampling rate
band pass filter
High pass filters
Band pass filters
8 port smart switch
RS232 PCI serial card
8 – channel analog
Computerized automated data
Block diagram showing elemental error sources, individual measurement systems measurement of individual variables, data reduction equations, and experimental results
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