Arrangements and methods for supplying heated air to a wing anti-icing system

An arrangement for supplying heated air to a wing anti-icing system on an aircraft propelled by a jet engine, the arrangement comprising:

• a pre-cooler configured to receive a flow of bleed-air from the jet engine, to receive a flow of cooling-air from a freestream, to cool the flow of bleed-air with the flow of cooling-air, to exhaust a flow of cooled bleed air, and to exhaust a flow of warmed cooling-air;
• and
• an ejector configured to:
• receive a portion of the flow of cooled bleed-air from the pre-cooler,
• to entrain a portion of the flow of warmed cooling-air with the portion of the flow of cooled bleed-air,
• to mix the portion of the flow of cooled bleed-air with the portion of the flow of warmed cooling-air to form a combined flow having a temperature and a volume suitable for use by the wing anti-icing system, and
• to exhaust the combined flow.

A method for supplying heated air to a wing anti-icing system on an aircraft propelled by a jet engine, the method comprising the steps of:

• receiving a flow of bleed-air from the jet engine and a flow of cooling-air from a freestream at a pre-cooler;
• cooling the flow of bleed-air with the flow of cooling-air at the pre-cooler;
• exhausting a flow of cooled bleed-air and a flow of warmed cooling-air from the pre-cooler;
• receiving a portion of the flow of cooled bleed-air at an ejector;
• entraining a portion of the flow of warmed cooling-air with the portion of the flow of cooled bleed-air at the ejector;
• mixing the portion of the flow of warmed cooling-air with the portion of the flow of cooled-bleed air at the ejector to form a combined flow;
• and
• exhausting the combined flow from the ejector.