Method and device for using hot air to de-ice the leading edges of a jet aircraft

摘要

A de-icing device includes a hot air circuit including an inlet for hot air bled from an engine, and a duct connecting the inlet to an outlet of the circuit which opens towards the leading edge. The device also includes electrical heating means associated with the duct, and control means for controlling the heating means connected to detection means that detect the temperature of the hot air downstream of the heating means and are able to activate these if the detected temperature of the bled air is below a value corresponding to a minimum temperature required for de-icing, increased by a predetermined margin. The range of temperatures of the hot air supplied to the leading edge is lowered overall, whereas the minimum de-icing temperature is assured. Composite materials can be used near the leading edge without being damaged.

主权项

1. A method for using hot air to de-ice at least one leading edge of an aircraft comprising at least one jet engine, the method comprising:
bleeding hot air from the at least one jet engine, conveying the bled hot air to the at least one leading edge, ensuring that the hot air reaching the at least one leading edge is at a temperature higher than or equal to a minimum temperature (tmin) required for de-icing the said at least one leading edge, wherein the bleeding from the at least one engine hot air which, under minimum power (Pmin) operating conditions of the at least one engine, is at a temperature lower than the minimum de-icing temperature (tmin), and electrically heating the bled hot air so that the temperature (t4) of the hot air reaching the at least one leading edge is at least equal to the minimum de-icing temperature (tmin).