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  • Experimental measuring and numerical simulation of swirl/prerotation flow [Elektronski vir]
    Predin, Andrej, 1961- ; Biluš, Ignacijo ; Klasinc, Roman, 1948-
    Two different measuring methods relating to the swirl/prerotation flow measuring at the impeller entrance or in the intake pipe of the radial turbomachine (pump) are given in the contribution. The ... prerotation flow appearance is as a result of the interaction between relative flows in the impeller channels and created back flow at the impeller entrance aye when pump operating out of impeller design point (part load operating, by flow rates smaller than the optimal). The goal of our contribution is in adequate measuring method estimating, taking into account to measure the global flow swirl and not some local eddy swirl flows that could appear as a consequence of some local flow disturbance. Therefore, two measuring methods - multiblade (ASB) and single blade (ASSB) anemometer are introduced, analyzed and compared. ASSB has advantages in its simple construction, simple use and in what is most important in the fact that is the entrance flow less disturbed with comparison with multiblade ASB system. That is important when some other flow properties are examined during measuring at the same time, for example the entrance or exit flow field measuring at the impeller entrance or exit diameter, respectively. With introduced ASSB method the direction and the swirl flow intensity could be measured.
    Vir: Proceedings [Elektronski vir] ([12] str.)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2003
    Jezik - angleški
    COBISS.SI-ID - 8550166

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