Author/Authors :
Soltani Mohammad Reza نويسنده , Golestani Mohammad Ali نويسنده Chalus branch, Islamic Azad University, faculty of Landscape Engineering , Masdari Mehran نويسنده Assistant Professor at the New Sciences and Technologies Department in University of Tehran.
Abstract :
The effect of porosity in oscillating situations (to the authorsʹ knowledge, for
the first time) on a supercritical airfoil (SC0410) has been experimentally investigated. Tests
have been carried out in an open circuit suction-type wind tunnel at a free stream Mach number of M
0 80. Both static and dynamic (pitching) tests have been carried out on the mentioned airfoil.
The oscillation frequency for the unsteady tests has been set to 3 and 6 Hz. The amplitude of
frequency is 1 deg. The effect of porosity has been surveyed on the magnitude of pressure
fluctuations, phase shift, and lift coefficient loop. The investigations show that increasing
porosity in the test section of transonic regime,
contrary to the impression, does not necessarily improve results.
