Patent ID: 7043922
Filing Date: 2006-05-16
Classification: F02C,F02M,F05D,F23D,F23K,F23R,Y02T,Y10T

Abstract:
1. A method of forming a fuel feed passage in the feed arm of a fuel injector comprising the steps of: a) providing a fuel feed passage in the feed arm of a fuel injector, the fuel feed passage having an initial cross-sectional flow area that corresponds with an initial fuel flow velocity, an initial convection heat transfer coefficient and initial localized wetted wall temperatures for the fuel feed passage, for a given fuel flow rate and fuel temperature; b) decreasing the initial cross-sectional flow area of the fuel feed passage by positioning a shaped structure within the fuel feed passage, so as to increase the fuel flow velocity and the convection heat transfer coefficient for the fuel feed passage, while lowering the localized wetted wall temperatures for the fuel feed passage, without varying the given fuel flow rate and fuel; and c) selecting the configuration of the shaped structure to produce a desired fuel flow velocity for the fuel feed passage at the given fuel flow rate.