Experimental measurement of ice accretion due to mixed-phase icing clouds

Sihong Yan, Jose Palacios

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The ingestion of ice crystals can result in engine icing incidents. These ice crystals are ingested into the engine, become partially melted and freeze on low pressure stators and casing. This paper introduces a series of mixed-icing experiments conducted inside the Pennsylvania State University Icing Wind Tunnel (PSU-IWT). The objective was to investigate how surface temperature and percentage melting of the icing cloud affect the ice accretion rate. An icing cloud was sprayed into the wind tunnel providing fully frozen water droplets. The fully glaciated cloud was partially melted using hot air ingestion. A NACA 0012 airfoil, instrumented with two thermocouples, was used as the test article. The temperature at the leading edge was maintained using internal temperature controlled airflow. The experimental results shows how variations from fully frozen to fully partially melted clouds affect the ice accretion thickness. Within the range of test conditions discussed in the paper, the ice accretion decreases with increases of the temperature of the ingested air. The increment of surface temperature reduces ice accretion until the surface temperature reached-10 °C. The erosion effect in PSU-IWT is less significant compared with results from similar test facilities. The capability of PSU-IWT in mixed-phase icing is verified and preliminary test results are shown.

Original languageEnglish (US)
Title of host publication2018 Atmospheric and Space Environments Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105586
StatePublished - 2018
Event10th AIAA Atmospheric and Space Environments Conference, 2018 - Atlanta, United States
Duration: Jun 25 2018Jun 29 2018

Publication series

Name2018 Atmospheric and Space Environments Conference


Other10th AIAA Atmospheric and Space Environments Conference, 2018
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Atmospheric Science
  • Space and Planetary Science


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