In this paper ANSYS Fluent was used to optimize components of a direct power extraction unit. This includes the fuel injector, combustor, nozzle, and cooling units. Findings show that configuring the fuel injector in a counter-swirl configuration results in uniform pressure and velocity distribution when the L/D ratio is 3.98. Changes in inlet location impacted pressure and velocity distribution. An angle of 20° with respect to the tangent was found to increase distribution efficiency. Temperature and velocity data from the combustor and nozzle were calculated using NASA CEA and Fluent. Magnitudes of temperature and velocity for CEA and Fluent matched within 7% and 4%, respectively. Differences are attributed to CEA assumption of one-dimensional isentropic flow. For the cooling system it is expected that cavitation will not occur since the saturation temperatures of water are not exceeded in the cooling channels.
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