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4. Main measurement techniques
4.1 Effort measurement
In wind tunnels, the force exerted by the flow on the model as a whole, or on part of it, is often an essential measure of a test. These forces are measured by instruments called "balances". . These are the parts through which the connecting force between the "weighed" model and its "non-weighed" support is transmitted. Obviously, the measurement is only correct if all the force between the weighed and unweighed parts passes through the balance. To achieve this, you need to avoid introducing any parasitic rigidity into the unavoidable electrical and pneumatic connections...
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Main measurement techniques
Measurement processing and corrections
Bibliography
Standards and norms
- Flight mechanics – concepts, quantities and symbols. - ISO 1151 - 1988
- Mesure de débit des fluides au moyen d'appareils déprimogènes insérés dans des conduites en charge de section circulaire (parties 1 à 4). - ISO 5167 - (2003)
Websites
Office national d'études et de recherches aérospatiales (ONERA - French national aerospace research agency)
German-Dutch Wind Tunnels
European Transonic Wind Tunnel ETW
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