Experiment investigation of hot-air anti-icing structure of engine inlet vane

A novel hot-air anti-icing structure of engine inlet vane is put forward and anti-icing experiment is conducted in a small open-circuit icing wind tunnel. The structure is combined with impinging jet, micro channels, and exhaust releasing exhausted hot air to sweep running-back water off the coating. The experiment is run at different simulated meteorological and bleed air conditions. The vane surface temperature and running-back water film distributions of two kinds of micro channel with channel spacing of 1.5 mm and 2 mm are obtained. The results indicate that impinging jet ensures the anti-icing effect of leading edge, smaller interval of micro channels brings better anti-icing effect at same bleed air condition, and temperature of bleed air has more influence than pressure. The vented out exhausted air protects the rear skin from running-back water icing effectively.