The Comparison of Form Drag and Profile Drag of a Wind Turbine Blade Section in Pitching
Extensive wind tunnel tests have been conducted to investigate the unsteady flow field over and behind a 2D model of a 660 kW wind turbine blade section in pitching motion. The surface pressure and wake dynamic pressure variation at a distance of 1.5 chord length from trailing edge were measured by pressure transducers during several oscillating cycles at 3 reduced frequencies and oscillating amplitudes. Moreover, form drag and linear momentum deficit are extracted and compared at various conditions. The results show that the wake velocity field and surface pressure of the model have similar behavior before and after the airfoil beyond the static stall angle of attack. In addition, the effects of reduced frequency and oscillation amplitudes are discussed. Keywords—Pitching motion, form drag, Profile drag, wind turbine.
Unsteady wake measurements of an oscillating flap at transonic speeds
Mesure en soufflerie des profils de sillage stationnaire ou instationnaire d'un profil aerodynamique avec volet oscillant. Mesure des profils de pression et de vitesse en 4 points axiaux. Etude de l'influence de l'angle du volet
The Contemporary British History Play
Introduction Biographical History Plays Social History Plays Oppositional History Plays Marxist and Socialist History Plays Feminist History Plays Deconstructionist and Postmodern History Plays and Satire The Search for a Theatrical Form Appendix A: Performance Dates of Contemporary British History Plays Appendix B: Performance Locales of Contemporary British History Plays Bibliography Index