STRUCTURAL INSTABILITY OF TRANSONIC FLOW OVER AN AIRFOIL
A. G. Kuz'mina and A. V. Ivanovab UDC 533.6.011 Inviscid transonic flow over the DSMA523a and Whitcomb airfoils and an airfoil described by a simple algebraic formula has been investigated numerically. The dependence of the flow structure and the lift coefficient on the freestream Mach number M and the angle of attack has been studied. The values of M and at which steady-state flow becomes unstable have been revealed. The relationship between the flow nonuniqueness occurring in certain ranges of variation of M and and the instability has been analyzed. a St. Petersburg State University, 28 Universitetskii Ave., Petrodvorets, St. Petersburg, 198504, Russia; email: alexander.kuzmin@pobox.spbu.ru; b A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus; email: ivanova-a@tut.by. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 77, No. 5, pp. 134-138, September-October, 2004. Original article submitted December 18, 2003.