In: Journal of Hydrology and Hydromechanics, vol. 68, no. 1
Mohammad Namaee - Jueyi Sui
Detaily:
Rok, strany: 2020, 70 - 82
Jazyk: eng
Kľúčové slová:
Bridge pier; Ice cover; Local scour; Acoustic Doppler velocimetry (ADV); Horseshoe vortex.
URL originálneho zdroja: http://www.ih.sav.sk/jhh
O článku:
Recent studies have shown that the presence of ice cover leads to an intensified local scour pattern in the
vicinity of bridge piers. To investigate the local scour pattern in the vicinity of bridge pier under ice-covered flow
condition comparing to that under open channel flow condition, it is essential to examine flow field around bridge piers
under different flow conditions. In order to do so, after creation of smooth and rough ice covers, three-dimensional timeaveraged
velocity components around four pairs of bridge piers were measured using an Acoustic Doppler velocimetry
(ADV). The ADV measured velocity profiles describe the difference between the velocity distributions in the vicinity of
bridge piers under different covered conditions. Experimental results show that the vertical velocity distribution which
represents the strength of downfall velocity is the greatest under rough covered condition which leads to a greater scour
depth. Besides, results show that the turbulent intensity increases with pier size regardless of flow cover, which implies
that larger scour depth occurs around piers with larger diameter.
Ako citovať:
ISO 690:
Namaee, M., Sui, J. 2020. Velocity profiles and turbulence intensities around side-by-side bridge piers
under ice-covered flow condition. In Journal of Hydrology and Hydromechanics, vol. 68, no.1, pp. 70-82. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2019-0029
APA:
Namaee, M., Sui, J. (2020). Velocity profiles and turbulence intensities around side-by-side bridge piers
under ice-covered flow condition. Journal of Hydrology and Hydromechanics, 68(1), 70-82. 0042-790X (until 2019) . DOI: https://doi.org/10.2478/johh-2019-0029
O vydaní:
Vydavateľ: VEDA, Publishing House of the Slovak Academy of Sciences, Bratislava, Slovakia
Publikované: 15. 3. 2020