Abstract
Aircraft icing poses a serious threat to flight safety. Unfrozen parts of impinging water on the surface of the aircraft will run back under the effect of high-speed airflow, altering liquid distribution and heat transfer characteristics. In this paper we conducted a series of experiments over a wide range of wind speed (Ua = 17.8~52.2 m/s), film Reynolds number (Ref = 26~128) and inclined angle (α = 0°, ±30°, ±45°) to investigate the dynamics of thin water film on an Aluminum substrate. The superficial morphology of the water film were investigated by high-speed camera, and the instantaneous film thicknesses were measured by a laser focus displacement meter based on a confocal chromatic technique. The interface between the gas and liquid phases consisted of underlying thin film and multiple scaled fluctuations. The measured time-averaged filim thickness data agrees with previous model predictions. Based on the experimental results, a relationship between the film thickness and the wind speed, film Reynolds number, inclined angle was proposed. A new correlation to calculate the interfacial shear stress and superficial roughness on the wavy surface is also suggested.
Original language | English |
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Title of host publication | 9th AIAA Atmospheric and Space Environment Conference |
Subtitle of host publication | AIAA AVIATION Forum |
Place of Publication | Reston, VA |
Publisher | Aerospace Research Central |
Number of pages | 9 |
ISBN (Electronic) | 978-1-62410-496-1 |
DOIs | |
Publication status | Published - 31 May 2018 |
Event | AIAA Atmospheric and Space Environments Conference - Denver, United States Duration: 5 Jun 2017 → 9 Jun 2017 Conference number: 9th https://arc.aiaa.org/doi/book/10.2514/MASE17 |
Conference
Conference | AIAA Atmospheric and Space Environments Conference |
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Country/Territory | United States |
City | Denver |
Period | 5/06/17 → 9/06/17 |
Internet address |