von Karman Institute Lecture Series and Events

INTRODUCTION TO MEASUREMENT TECHNIQUES

From October 10 -14, 2011

von Karman Institute, Rhode-St-Genèse, Belgium

The objective of this course is to provide young engineers with a broad overview of traditional and advanced measurement techniques applicable to fluid dynamics. Each measurement technique and its field of application will be described. Limitations and advantages will be discussed and special attention will be given to the subject of error estimation.

A choice of relevant techniques will be demonstrated to groups of five people maximum during lab sessions on Thursday afternoon and Friday in the VKI facilities. This will provide an opportunity to manipulate the available hardware and will allow for discussion of individual problems. This course, prepared and presented by the VKI teaching staff, is based on a long experience with the different techniques for research applications.

Lectures are given by Professors T. Arts, J.-F. Brouckaert, J.-M. Buchlin, M. Carbonaro, O. Chazot, M. Riethmuller, Ch. Schram, R.A. Van den Braembussche and Dr. Y. Babou of the von Karman Institute. The Director of this course is Professor T. Arts of the von Karman Institute.

1. Components of a measurement chain

2. Measurement uncertainties and errors

3. Transducers

• active and passive transducers
• transducers for different applications
• amplifiers (types and matching)
• frequency response

4. Pressure measurements

• static pressure (description and errors)
• total pressure (probes and errors)
• flow direction measurements (2 & 3 dimensional)
• unsteady pressure measurements (frequency response &calibration)

5. Temperature measurements

• thermocouples, cold wires
• surface measurement devices (thin films - liquid crystals)
• infrared thermography (principles - spatial resolution
• quality factor)

6. Hot wire anemometry

• probe construction and calibration
• control circuits & linearisation
• angular response
• turbulence measurements

7. Optical measurement techniques

• laser doppler velocimetry (LDV)
• particle image velocimetry (PIV)
• optical density & spectroscopic measurements

8. Flow visualisation

• air and water flows
• streamlines and skin friction lines

9. Force measurements

10. Signal displays, recording & processing

• display, recording
• analog to digital conversion
• Fourier analysis
• numerical systems and their application for data processing

The following demonstrations are scheduled on Thursday afternoon and Friday :

• LDV, PIV & holographic interferometry
• hot wires
• infrared thermography
• thin films, liquid crystals, thermocouples, and cold wires
steady and unsteady pressure measurements
• flow visualisation (watertunnel, schlieren, shadowgraph, oil flow, etc.)

 

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Location : von Karman Institute for Fluid Dynamics, Rhode-St-Genèse, Belgium