Bernd
The FOHE cools Oil. Fuel flows through 1,080 tubes with spaces between all of them between Face and Exit. This reduces cross section and increases Pressure and transit time. But the Oil gets cooled. There is a bypass for the Oil when further cooling is unnecessary, yet the Fuel must still transit the FOHE, regardless of Engine Demand. At this point, if max Fuel is commanded, and no Oil is being cooled, why, in your opinion, must the Fuel continue to flow through this necked down passageway, just to get to the HO side of the pumps for the FMU?
What is your opinion of the GE architecture: HP upstream the FOHE?
rgds.
AF
Last edited by airfoilmod; 21st March 2009 at 23:42.