RT Monograph
SR 00
A1 Da Riva de la Cavada, Ignacio
A1 Liñán Martínez, Amable
A1 Fraga, Enrique
A1 Urrutia Pombo, José Luis
T1 Diffusion flames and supersonic combustion 1
YR 1966
FD 1966
SP 31
AB The paper describes some analytical work connected with the purely diffusive mode of supersonic combustion. The basic problems considered have been: the study of the hydrogen-air diffusion flames, under hoth close to and far from equilibrium conditions, and the study of the aerodynamic field near the injector exit when the ratio of injected to outer total pressures is small. The internal structure of hydrogen-oxygen diffusion flames close to equilibrium has been studied using the first order approximation of an asymptotic expansion method, in which the large parameter represents the ratio between a characteristic mechanical time and a chemical time. Far from equilibrium conditions, the above mentioned solution fails. However, when a free jet of hydrogen, parallel to the air stream is used for injection purposes, a very simple near frozen approach may be used. The main simplifying features of such an approach being; the use of an overall chemical reaction, the assumption that fuel and oxidizer mix without appreciable depletion and chemical heat release, and the linearization of the mixing problem. Finally a discussion of some means of improving the mixing process, near the injector exit, is made, using some experimental evidence from work on related problems by other groups.
PB INTA
PP Madrid
AV Published
LK http://oa.upm.es/2162/