An intercooled-recuperative Brayton cycle is known to have a significantly higher thermal efficiency and hence a lower specific fuel consumption. The success of an ICR gas turbine engine, however, depends heavily on the performance of the recuperator. Uniform flow leading into the recuperator is usually assumed in the recuperator design. This experimental work represents an initial effort to understand and to improve the flow distribution in a marine gas turbine exhaust diffuser/recuperator configuration. Velocity measurements immediately downstream of the recuperator show that the flow through the recuperator is nonuniform; but the nonuniform flow distribution remains invariant with respect to the engine power level.

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