Aircraft/Aero-engine icing is widely recognized as a significant hazard to aircraft operations in cold climates. The speaker will introduce his recent research progress in conducting a comprehensive experimental campaign to elucidate the underlying aircraft icing physics. By leveraging the unique Icing Research Tunnel available at Iowa State University (i.e., ISU-IRT), comprehensive investigations are conducted to examine the important micro-physical processes pertinent to aircraft icing phenomena. A suite of advanced flow diagnostic techniques, including molecular tagging velocimetry and thermometry (MTV&T), particle image velocimetry (PIV), digital image projection (DIP), and high-speed infrared (IR) imaging thermometry techniques, are developed and applied to quantify water droplet impinging dynamics, transient behaviors of wind-driven water runback flows, unsteady heat transfer and dynamic solidification processes over airfoil/wing surfaces. Anti-/de-icing performances of various “state-of-the-art” hydro-/ice-phobic coatings/surfaces, including a lotus-inspired superhydrophobic surface (SHS) and a pitcher-plant-inspired Slippery Liquid-Infused Porous Surfaces (SLIPS), are evaluated quantitatively under different icing conditions (i.e., ranged from dry rime icing to wet glaze icing conditions). The recent research efforts on unmanned-aerial-system (UAS) icing and aero-engine anti-/de-icing will also be introduced briefly. The findings derived from the icing physics studies are extremely helpful in improving current icing accretion models and developing effective anti-/de-icing strategies to ensure the safer and more efficient operation of aircraft/aeroengine in cold weather.
Dr. Hui Hu is the Martin C. Jischke Professor and Associate Dept. Chair for Graduate Education at the Department of Aerospace Engineering, Iowa State University. He received his BS, MS, and Ph.D. in Aerospace Engineering from the Beijing University of Aeronautics and Astronautics (BUAA) in China and a Ph.D. in Mechanical Engineering from the University of Tokyo in Japan. His recent research interests include advanced optical/laser-based diagnostics, aircraft/aero-engine icing physics and anti-/de-icing technology; flight dynamics of Unmanned-Aerial-Systems (UAS); wind energy and wind turbine aeromechanics; Fluid-Structure Interactions (FSI) of built structures in violent windstorms (e.g., tornadoes, downbursts, and snowstorms). Dr. Hu is an ASME Fellow and AIAA Associate Fellow. He is serving as an editor of “Experimental Thermal and Fluid Science-Elsevier” and an associate editor of “The ASME Journal of Fluid Engineering” and “ASME Open Journal of Engineering”. Dr. Hu received several prestigious awards in recent years, including the 2006 NSF-CAREER Award, the 2007 Best Paper in Fluid Mechanics Award (Measurement Science and Technology, IOP Publishing), the 2009 AIAA Best Paper Award in Applied Aerodynamics, the 2012 Mid-Career Achievement in Research Award of Iowa State University, 2013 AIAA Best Paper Award in Ground Testing Technology, 2014 Renewable Energy Impact Award of Iowa Energy Center, and 2022 AIAA Best Paper Award on Atmospheric and Space Environments. Further information about Dr. Hu’s technical background and research activities is available at: http://www.aere.iastate.edu/~huhui/