Abstract
It is very difficult to assess unsteady force effects on a profile without direct force measurements. Even results of pneumatical and optical measurements are biased by additional errors in comparison with measurements of steady flows. In the paper presented attempt is made to estimate erroes arising during evaluation of interferogrammes of transonic instability taken by a high-speed camera [1]. The flow field of incoming stream is uniform and time flow changes, at which oscillating movement of terminal shock wave of supersonic region takes place, are almost exceptively limited in the field near airfoil. It is confirmed by a streak photography taken through.75 mm slit and presented in Fig. 1.
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References
Vlček V,: Some experimental results connected with the transonic instabilities on an airfoil Strojnicky Sasopis, 29, 1978, No. 3, pp. 342–354
Dvořák R., Šafařik P.: An experimental study of high speed flow in turbine cascades at extreme incidence prepared to publication, ČSVTS, Plzeň
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© 1985 Springer-Verlag, Berlin, Heidelberg
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Šafařík, P., Vlček, V. (1985). Using Interferometric Measurements in Calculation of Aerodynamic Forces. In: Píchal, M. (eds) Optical Methods in Dynamics of Fluids and Solids. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-82459-3_38
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DOI: https://doi.org/10.1007/978-3-642-82459-3_38
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-82461-6
Online ISBN: 978-3-642-82459-3
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