HYDROGASDYNAMICS IN TECHNOLOGICAL PROCESSES

INFLUENCE OF THE GEOMETRY OF THE NOZZLE
ON THE CHARACTERISTICS OF AN EXHAUST JET

O. G. Buzykin, M. N. Kogan, and A. N. Kucherov

UDC 533.6+532.517

Two solutions for the parameters of a turbulent exhaust 
jet of a dual-duct engine - the traditional solution within the 
framework of Prandtl equations of the type of boundary-layer equations 
and calculation of the near-range field within the framework of the 
Navier-Stokes equations with subsequent calculation within the 
framework of the Prandtl equations for large distances - have 
been compared. It has been shown that the influence of the real geometry 
of the nozzle exit section, including the shift of the center body 
and the main duct forward from the exit section of the cold secondary 
duct, can be allowed for by correcting the constant of the source 
term in the differential equation for turbulent kinematic viscosity.

N. E. Zhukovskii Central Aerohydrodynamic Institute, Zhukovskii-3, 
140180, Moscow Region, Russia. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 79, No. 3, pp. 37-46, May-June, 2006. Original 
article submitted September 9, 2004; revision submitted March 22, 
2005.