Aircraft icing poses a serious threat to flight safety. Unfrozen 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, a series of experiments are conducted over a wide range of wind speeds ( U a = 17.8 52.2    m / s ), film Reynolds numbers ( R e f = 26 128 ), and inclined angles ( α = 0 , ± 30 , ± 45    deg ) to investigate the dynamics of thin water film on an aluminum substrate. The superficial morphology of the water film is investigated by a high-speed camera, and the instantaneous film thicknesses are measured by a laser focus displacement meter based on a confocal chromatic technique. The interface shape is found to consist of an underlying thin film and multiple scaled fluctuations; therefore, the results are divided into two parts for analysis: the mean film thickness and the root-mean-square thickness. A relationship between the mean film thickness and the wind speed, the film Reynolds number, the inclined angle is proposed. After nondimensionalized processing based on the triangular relationship, the averaged film thickness data agree with the previous model of an error within 25%. New correlations to calculate the interfacial shear stress and superficial roughness are suggested within the experimental range.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Experimental Study of Water Film Dynamics Under Wind Shear and Gravity


    Beteiligte:
    Leng, Mengyao (Autor:in) / Chang, Shinan (Autor:in) / Lian, Yongsheng (Autor:in) / Wu, Hongwei (Autor:in)

    Erschienen in:

    AIAA Journal ; 56 , 5 ; 1803-1811


    Erscheinungsdatum :

    2018-03-05


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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

    Leng, Mengyao / Chang, Shinan / Lian, Yongsheng et al. | AIAA | 2017


    Gravity Wave and Wind Shear Models

    Strobell, D. F. / Sicardy, B. | British Library Online Contents | 1997


    AIAA 2006-0738 Dynamics Of Evaporating Film Under Reduced Gravity

    Padate, S. / Allen, J. S. / Hermanson, J. C. et al. | British Library Conference Proceedings | 2006


    Gravity waves and wind-shear in the MLT at 23°S

    Clemesha, Barclay / Batista, Paulo | Elsevier | 2007


    Gravity waves and wind-shear in the MLT at 23°S

    Clemesha, Barclay | Online Contents | 2008