Eaton Aerospace can improve fuel flow with its variable displacement ring pump (VDRP).
This advanced pump offers significant benefits in thermal performance as it produces only the flow and pressure demanded by the fuel system. This gives an overall system effeciency of 25% in cruise and idle descent operating ranges, compared to the 5% overall efficiency of a traditional gear-pump fuel system.
This results in lower fuel system temperatures – up to 100°F at idle descent; lower parasitic input shaft power consumption -15hp at cruise settings; and better specific fuel consumption.
The VDRP uses a simple displacement control actuation mechanism that adjusts to the dynamic performance demands of the jet engine fuel system. Because the actuation system allows the VDRP to be controlled easier in a closed-loop mode it can responsively and accurately meter engine burn flow. Low actuation force levels required by the VDRP also ensure rapid response and a more stable overall operation.
Source: Flight Daily News
