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.