TESTING A SIMPLEX SWIRL INJECTOR, FOR ROCKET ENGINE APPLICATION
sergio Oliveira1; Rene Nardi Rezende2; Amilcar Pimenta2
1 IAE; 2 ITA
doi:10.20906/CPS/COB-2015-1947
Resumo
This paper describes the test equipment used to cold test simplex swirl injectors of a certain performance, with application on liquid rocket engine. Starting with a set of well-known equations, dully modified as compared to a traditional model, it is possible to define dimensions of a test specimen capable of delivering the required mass flow at the specified spray cone angle. A simplex swirl injector was then built in accordance with that methodology, attached to a device that supplies pressurized water and equipped with sensors to collect data related to inlet pressure as well as mass flow. Actual pressure, mass flow and spray angle data were collected and compared with the values prescribed by the theoretical model and found to be within reasonable range. Finally, an equation describing the injector behavior was obtained, which exhibits the mass flows as a function of the injector inlet pressure. A significant part of the paper will be used to describe the test bench, the data collection instruments and details on the software used to summarize the data. Pictures and sketches will be used along the description to better illustrate the work.
Palavras-chave: Simplex; Swirl; Injector; Rocket