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On the non-intrusive evaluation of fluid forces with the momentum equation approach

David, Laurent and Jardin, Thierry and Farcy, Alain On the non-intrusive evaluation of fluid forces with the momentum equation approach. (2009) Measurement Science and Technology, 20 (9). 1-11. ISSN 0957-0233

(Document in English)

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Official URL: http://dx.doi.org/10.1088/0957-0233/20/9/095401


The aim of this paper is to discuss the advantages and difficulties linked with the experimental application of the momentum equation approach as a non-intrusive way to predict the unsteady loads experienced by an airfoil in motion. First, in order to evaluate the influence of the varying parameters relative to the calculation of the corresponding drag and lift coefficients, numerical flow fields obtained by means of DNS are used. The comprehension of the impact of the spatial and temporal resolutions, velocity accuracy or third velocity component on the estimation of forces allows us to quantify the accuracy of the approach and helps in specifying the parameters setting which could lead to a consistent experimental application. In a second step, the approach is applied to experimental flow fields measured through the use of time resolved particle image velocimetry (TR-PIV). A low Reynolds number flow around an impulsively started airfoil is considered. The loads and vorticity flow fields are correlated and compared with those obtained by DNS.

Item Type:Article
Additional Information:Thanks to IOP Publishing. The definitive version is available at http://iopscience.iop.org/0957-0233/
HAL Id:hal-01132420
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechnique (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Université de Poitiers (FRANCE)
Laboratory name:
Deposited On:17 Mar 2015 10:26

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