QUASI-SELF-SIMILAR DESCRIPTION OF AN EXHAUST JETA. N. Kucherov UDC 533.6 The method of construction of an analytical solution for the far field of an exhaust jet on the basis of the quasi-self-similar solution of Prandtl equations and the turbulence model with one differential equation for the coefficient of kinematic viscosity is described. An exact numerical solution for distances to about 101 radii of the nozzle is constructed for the basic version. Then, a numerical solution and its analytical approximation by the quasi-self-similar solution are constructed. Approximations of the similarity parameters of the self-similar problem as functions of the similarity parameters of the initial problem in the form of polynomials allow construction of analytical solutions for different situations, which are in satisfactory agreement with the exact numerical solution at distances of 103 radii. N. E. Zhukovskii Central Aerohydrodynamic Institute, Zhukovskii, Russia; email: email@example.com. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 1, pp. 60-64, January-February, 2003. Original article submitted July 23, 2002.