LOW HUB-TO-TIP RATIO FAN FOR A TURBOFAN GAS TURBINE ENGINE

摘要

A fan for a turbofan gas turbine engine having a low hub-to-tip ratio is disclosed. The fan includes a rotor hub and a plurality of radially extending fan blades. Each fan blade defines a hub radius (RHUB), which is the radius of the leading edge at the hub relative to a centerline of the fan, and a tip radius (RTIP), which is the radius of the leading edge at a tip of the fan blade relative to the centerline of the fan. The ratio of the hub radius to the tip radius (RHUB/RTIP) is less than 0.29. In a particular embodiment, this ratio is between 0.25 and 0.29. In another particular embodiment, this ratio is less than 0.25.

主权项

1. A fan for a turbofan gas turbine engine, the fan defining a fan centerline and comprising a rotor hub and a plurality of fan blades adapted to rotate about the fan centerline, the fan blades extending radially from the rotor hub to outer tips thereof, the fan blades circumferentially spaced apart about the rotor hub in a single axial blade row, each of the fan blades having a leading edge, a hub radius (RHUB) and a tip radius (RTIP), wherein the hub radius (RHUB) is the radius of the leading edge at the hub relative to the fan centerline, and the tip radius (RTIP) is the radius of the leading edge at the outer tip relative to the fan centerline, and wherein the ratio of the hub radius to the tip radius (RHUB/RTIP) is less than 0.29.