Flow Analyses of Integrated Liquid Fuel Ramjet Propulsion System.

Abstract

 
A CFD study is performed to check the integrated flow behaviour of the Liquid Fuel Ramjet Propulsion system by including air intakes, combustor and nozzle. Resolving both supersonic and subsonic flow scales in the same domain makes the simulations complex. Addition of combustion with stiff chemistry makes the simulations more difficult. Analyses are carried out using commercially available CFD software. Liquid fuel is injected as discrete phase and the flow turbulence is modelled using Realizable k-e turbulence model. Jet-A air combustion has been simulated using combined finite rate/eddy dissipation model. Finite rate chemistry was modelled using three step chemistry which was obtained from the published literature. Flow structures such as oblique shocks, normal shocks and combustion are captured in the analyses. Normal shock with respect to the pressure obtained because of the pressure raise due to combustion is observed. Also, obtained CFD results are compared with that the experimental values that are conducted in connect pipe mode, for the same operating point, and a good agreement between the two are observed.
Subjects
LIQUID fuels; PROPULSION systems; SUBSONIC flow; LIQUID analysis; SUPERSONIC flow

Description