Počet záznamů: 1  

Investigation of sandstone erosion by continuous and pulsed water jets

  1. 1.
    0504926 - ÚGN 2020 RIV US eng J - Článek v odborném periodiku
    Raj, P. - Hloch, Sergej - Tripathi, R. - Srivastava, M. - Nag, A. - Klichová, Dagmar - Klich, Jiří - Hromasová, M. - Muller, M. - Miloslav, L. - Chattopadhyaya, S. - Adamcik, P.
    Investigation of sandstone erosion by continuous and pulsed water jets.
    Journal of Manufacturing Processes. Roč. 42, June 2019 (2019), s. 121-130. ISSN 1526-6125. E-ISSN 2212-4616
    Grant CEP: GA MŠMT(CZ) LO1406
    Institucionální podpora: RVO:68145535
    Klíčová slova: continuous water jet * pulsed water jet * erosion
    Obor OECD: Mechanical engineering
    Impakt faktor: 4.086, rok: 2019
    Způsob publikování: Omezený přístup
    https://www.sciencedirect.com/science/article/pii/S1526612518313525?via%3Dihub

    The study compares the sandstone erosion manifestations (depth, width, and volume of the removed material)
    caused by continuous and pulsed water jets (WJs) with a frequency f=20 kHz and 40 kHz. The WJ head follows
    an inclined trajectory at an angle of 45° to the horizontal surface. The starting point of the head was positioned 5
    mm above the sandstone surface. The traverse speed of the head was varied from v = 0.25 mm/s to 1 mm/s. The
    structural changes and plastic deformation caused by the mechanical effect of the continuous and pulsed WJs
    were analysed using SEM and optical profilometer. The results showed that an optimal standoff distance was
    responsible for the maximum erosion effect under both continuous and pulsed regimes. The PWJ at f= 40 kHz
    showed better erosion performance in terms of depth (6.8 mm), width (6.83 mm) and volume removed
    (27.31mm3) as compared to PWJ at f=20 kHz and CWJ. The microstructural topography at varying standoff
    distance (z=10 mm to 45 mm) showed erosion features such as micro-pits, cracks, perforated holes responsible
    for different erosion stages. On-line monitoring via means of acoustic emission was measured to evaluate the
    erosion phenomenon on the sandstone surface during the impact of the PWJ and CWJ. The correlation between
    the acoustic emission results and the erosion parameters showed the progression of the erosion process under
    different technological conditions.
    Trvalý link: http://hdl.handle.net/11104/0296461

     
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Počet záznamů: 1  

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