HYBRID VARIABLE AREA FUEL INJECTOR WITH THERMAL PROTECTION

摘要

A hybrid variable area fuel injector is provided. The fuel injector includes a main body portion and a head portion carried by the main body portion. The fuel injector defines a fixed area port provided by the head portion for use during low flow conditions. The fuel injector defines a variable area port for use during high flow conditions. The variable area port is provided between the main body portion and the head portion. The area of the variable area port is adjustable due to the position of the head portion relative to the main body portion. The fuel injector also includes a shield portion surrounding at least a portion of the head portion. The shield portion reduces the amount of cross-flow that impinges on the head portion to reduce heat transfer to the head portion.