INVESTIGATIONS OF A COMBUSTOR USING A 9-POEVT SWIRL-VENTURI FUEL INJECTOR: RECENT EXPERIMENTAL RESULTS

摘要

This paper explores recent results obtained during testing in an optically-accessible, JP8-fueled, flame tube combustor using baseline lean direct injection (LDI) research hardware. The baseline LDI geometry has 9 fuel/air mixers arranged in a 3 x 3 array. Results from this 9-element array include images of fuel and OH speciation via planar laser-induced fluorescence (PLIF), which describe fuel spray pattern and reaction zones. Preliminary combustion temperatures derived from Stokes/Anti-Stokes Spontaneous Raman Spectroscopy are also presented. Other results using chemiluminescence from major combustion radicals such as CH~* and C_2~* serve to identify the primary reaction zone, while OH PLIF shows the extent of reaction further downstream. Air and fuel velocities and fuel drop size results are also reported.