Instability of impinging sheet is analyzed for power-law fluid by solving dispersion equations deduced based on a simplified linear model under anti-symmetric and symmetric disturbances in present work. An impinging atomization platform is established, and experiments for gelled power-law simulant are accomplished. A comparative analysis between experimental and linear results is conducted. Relative conclusions indicate that anti-symmetric disturbance is superior to symmetric disturbance in instability of the sheet. Increasing sheet velocity or decreasing sheet thickness can accelerate instability, but the disturbance of sheet is suppressed by promoting consistency and flow index. Experimental impinging sheets are divided into four modes and their distributions are also identified. Besides, spray angle increases, but breakup length and dominant wavelength decrease with increasing jet velocity and impinging angle. By comparison, experimental breakup lengths of 75° impinging angle relatively accord with theoretical ones. Theoretical breakup lengths are lower than experiments at lower sheet velocity but have an opposite trend at higher sheet velocity when impinging angle is 90°. As to dominant wavelengths, linear analysis shows an acceptable overestimation compared to experiment. In spite of some discrepancies, linear analysis developed at present can be used to predict the breakup characteristics of gelled power-law sheet.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A simplified linear model and breakup characteristics of power-law sheet formed by a doublet impinging injector


    Contributors:
    Deng, Han-Yu (author) / Zhuo, Chang-fei (author) / Feng, Feng (author)


    Publication date :

    2018-05-01


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Breakup Characteristics of a Newtonian Liquid Sheet Formed by a Doublet Impinging Jet Injector

    Heislbetz, Bernhard / Madlener, Klaus / Ciezki, Helmut | AIAA | 2007


    Breakup Characteristics of a Newtonian Liquid Sheet Formed by a Doublet Impinging Jet Injector AIAA Paper

    Heislbetz, B. / Madlener, K. / Ciezki, H. et al. | British Library Conference Proceedings | 2007


    The Breakup Characteristics of Liquid Sheet Formed by Like-Doublet Injectors

    Jung, Kihoon / Khil, Taeock / Yoon, Youngbin et al. | AIAA | 2002