| Abstract: | A comparative numerical analysis of the thrust characteristics of axisymmetric jet nozzles designed by various methods is
carried out. “Extremal“ nozzles designed by variational methods in the absence/presence of internal shocks (I), so-called
“truncated“ nozzles with a uniform characteristic (II), and nozzles designed by the method of conjugate circular arcs (III)
are considered. A comparison is carried out for both perfect and real gases (in the latter case the boundary layer gas viscosity
is taken into account). It is shown that extremal nozzles are the most efficient, while truncated nozzles are somewhat less
so. The thrust characteristics of nozzles designed by the method of conjugate circular arcs for both inviscid and viscous
flow are inferior to those of extremal nozzles by 0.7–1%.
Moscow, Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 1, pp. 152–162, January–February,
2000.
The research was carried out with financial support from the Russian Foundation for Basic Research (project No. 99-01-00891). |
