Numerical Simulation of Pitot Solid Fuel Ramjets

Cold flowfleld of pitot SFRJ with three different nozzle throat diameters were simulated at M4.03 and M3.0 by FLUENT software. The flowfield characteristics and engine performances were obtained and analyzed. The results indicate that pressure data obtained by simulation have an overall agreement with those got by experiment. Pitot inlet at design or ideal mode operates with a tiny subcritical position, instead of critical or supercritical position. With the increase of nozzle diameter, nozzle exit total pressure recovery increases and drag coefficient decreases. Compared with the operation at M4.03, SFRJs at M3.0 have lower mass capture ratio, higher nozzle exit total pressure recovery and higher drag coefficient.