Combustor for a micro-turbine gas generator

A combustor, comprising:

• a first toroidal casing circumscribing an axis and having an inlet configured to receive fluid, the first casing defining a first internal chamber in fluid communication with the inlet;
• a second toroidal casing disposed within the first internal chamber and circumscribing the axis, the second casing having an outer wall defining a second internal chamber, the outer wall having a plurality of orifices formed therethrough, the orifices providing fluid communication between the first and second chambers;
• a plurality of fuel injector elements, each fuel injector element having a first portion disposed about a first axis, a second portion disposed about a second axis and a third portion disposed about a third axis, the first axis being parallel to the second axis, the third axis being perpendicular to the first and second axes, each fuel injector element being entirely disposed between the first and second toroidal casings, each fuel injector element positioned to inject fuel into the second chamber through the orifices;
• and
• an outlet structure defining at least one channel in fluid communication with the second chamber, the at least one channel being oriented parallel to the axis.