TURBOFAN ARRANGEMENT WITH BLADE CHANNEL VARIATIONS

摘要

A fan section for a gas turbine engine according to an example of the present disclosure includes, among other things, a rotor hub defining an axis, and an array of airfoils circumferentially spaced about the rotor hub. Each of the airfoils include pressure and suction sides between a leading edge and a trailing edge and extending in a radial direction from a 0% span position at an inner flow path location to a 100% span position at an airfoil tip, facing pressure and suction sides of adjacent airfoils defining a channel in a chordwise direction having a width between the facing pressure and suction sides at a given span position of the adjacent airfoils. The width at each pressure side location along the channel is defined as a minimum distance to a location along the suction side, the width converging and diverging along the channel for at least some span positions.

主权项

1. A fan section for a gas turbine engine comprising:
a rotor hub defining an axis; an array of airfoils circumferentially spaced about the rotor hub, each of the airfoils including pressure and suction sides between a leading edge and a trailing edge and extending in a radial direction from a 0% span position at an inner flow path location to a 100% span position at an airfoil tip, facing pressure and suction sides of adjacent airfoils defining a channel in a chordwise direction having a width between the facing pressure and suction sides at a given span position of the adjacent airfoils; wherein the width at each pressure side location along the channel is defined as a minimum distance to a location along the suction side, the width diverging without converging along the channel for at least some of the span positions, and the width converging and diverging along the channel for at least some span positions greater than 5% span and less than half of the span positions; and wherein each of the array of airfoils has a solidity defined by a ratio of an airfoil chord over a circumferential pitch, the solidity being between about 1.6 and about 2.5 for each of the span positions in which the width converges along the channel.