Rolls-royce Corporation

Adam Newman

Richard Peace

An electric propulsion unit () for an aircraft is shown. A fan () produces a pressured airflow (P) by raising the pressure of an incident airflow (I). An electric machine () is arranged to drive the fan and is located within a casing (). A primary cooling circuit () is located within the casing, and includes the electric machine and a first pass of a fluid-fluid heat exchanger (), thereby placing the electric machine and the fluid-fluid heat exchanger in thermal communication. A secondary cooling circuit includes a second pass of the fluid-fluid heat exchanger and an air-fluid heat exchanger () located within the pressurised airflow produced by the fan, thereby placing the fluid-fluid heat exchanger and the air-fluid heat exchanger in thermal communication.

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Derby, United Kingdom

Adam Newman