In order to get mixing between fuel and oxidizer streams, for example in jet engines, rocker combusters and industrial gas burners the flowfield of an overexpanded triple free jet has been investigated. The flowfield was generated by three Laval nozzles set in common end wall with equal spacing in a triangular configuration. Total pressure measurements were made for three exit Mach numbers of 1.5, 2, and 2.5 with the range of stagnation pressure from 2.9 to 4.5 atmospheres. The spacing between the nozzle based on the throat diameter was varied as 2.8, 36, 4.4, and 6. The triple jet has been compared to a single jet operating at the same initial flow conditions. It is shown that the triple jet in triangular configuration undergoes a transformation in its shape and axis orientation. The triple jet spreads at the base side more than at the top side. The differential spreading rate generates more flow disturbance and, therefore, enhances the mixing process.
Main features of overexpanded triple jets
Hauptmerkmale überdehnter Streifachsstrahlen
AIAA Journal ; 32 , 11 ; 2205-2209
1994
5 Seiten, 8 Bilder, 18 Quellen
Article (Journal)
English
Main Features of Overexpanded Triple Jets
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