초록 ▼

An inlet ice protection system, and methods for making and using ice protection systems. In one embodiment, the inlet includes an acoustic liner positioned forward of the inlet throat and has a perforated face sheet, a perforated back sheet, and an acoustic core between the face sheet and the back s

An inlet ice protection system, and methods for making and using ice protection systems. In one embodiment, the inlet includes an acoustic liner positioned forward of the inlet throat and has a perforated face sheet, a perforated back sheet, and an acoustic core between the face sheet and the back sheet. The perforations through the face sheet are sized to allow acoustic energy to be transmitted to and dissipated in the acoustic core, and the perforations in the back sheet are sized to transmit hot gas through the acoustic liner to the surface of the inlet to heat the inlet and prevent and/or restrict ice formation on the inlet. The face sheet can have a higher porosity than the back sheet, and both the sheets and the core can be formed from titanium to withstand high gas temperatures.

대표청구항 ▼

1. An ice protection system for an aircraft engine inlet, comprising:an external surface portion; an internal surface portion positioned inwardly of the external surface portion; a lip surface portion extending between the external surface portion and the internal surface portion to define a hilite,

1. An ice protection system for an aircraft engine inlet, comprising:an external surface portion; an internal surface portion positioned inwardly of the external surface portion; a lip surface portion extending between the external surface portion and the internal surface portion to define a hilite, at least one of the lip surface portion and the internal surface portion defining an inlet flow surface having a minimum flow area aft of the hilite, the inlet flow surface having first apertures defining a first porosity; a back surface offset from the inlet flow surface having second apertures defining a second porosity less than the first porosity, the second apertures being coupleable to a source of pressurized, heated gas and being sized to direct a quantity of the gas through the first apertures sufficient to at least restrict the formation of ice on the inlet flow surface; and an acoustic core positioned between the back surface and the inlet flow surface with at least a portion of the first apertures in fluid communication with the second apertures through the acoustic core.