Experimental Study of the Dynamics of Water Film on an Aluminum Substrate under Wind Shear

Mengyao Leng, Shinan Chang, Yongsheng Lian, Hongwei Wu

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

1 Citation (Scopus)
80 Downloads (Pure)

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 languageEnglish
Title of host publication9th AIAA Atmospheric and Space Environment Conference
Subtitle of host publicationAIAA AVIATION Forum
Place of PublicationReston, VA
PublisherAerospace Research Central
Number of pages9
ISBN (Electronic)978-1-62410-496-1
DOIs
Publication statusPublished - 31 May 2018
EventAIAA Atmospheric and Space Environments Conference - Denver, United States
Duration: 5 Jun 20179 Jun 2017
Conference number: 9th
https://arc.aiaa.org/doi/book/10.2514/MASE17

Conference

ConferenceAIAA Atmospheric and Space Environments Conference
Country/TerritoryUnited States
CityDenver
Period5/06/179/06/17
Internet address

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