An Experimental Study of a Hot-air-based Anti-/De-icing System for Icing Protection of Aero-engine Inlet Guide Vanes 2019-01-2039
We report the progress made in our recent efforts to develop and characterize a hot-air-based anti-/de-icing system for the icing protection of aero-engine inlet guide vanes (IGVs). The experimental study was conducted in an icing research tunnel available at Iowa State University (i.e., ISU-IRT). An IGV model embedded with U-shaped hot-air flowing conduit connecting to a hot air supplying system heated by using a high-power electric-heater was designed and manufactured for the experimental investigation. During the experiments, while a high-speed, high-resolution imaging system was used to record the changes in the dynamic ice accretion process over the surface of the IGV model with and without turning on the hot-air supplying system, the corresponding surface temperature distribution of the IGV model under different test conditions were measured quantitatively by using a row of embedded thermocouples. A comprehensive parametric study was conducted to examine the effects of the operation parameters (i.e., the temperature and flow rate of the hot air streams) of the hot-air-based anti-/de-icing system on its effectiveness for the icing protection of the IGV models. The acquired ice accretion images were coordinated with the quantitative surface temperature measurements to elucidate the underlying physics. It was demonstrated clearly that, with proper setting of the operation parameters (i.e., temperature and flow rate of the hot air streams), the hot-air-based anti-/de-icing system would be able to effectively prevent ice formation and accretion over the entire surface the IGV model during the icing events.
Linkai Li, Linchuan Tian, Yang Liu, Hui Hu, Xuejun Liu, Isaac Hogate, Atul Kohli
Iowa State University, United Technologies Pratt and Whitney, Pratt & Whitney
International Conference on Icing of Aircraft, Engines, and Structures