SECONDARY FLOW MEASURING AT THE RADIAL FAN ENTRANCE

Andrej Predin, Ignacijo Biluš

Abstract

Analyze is given of different measuring methods relating to the prerotation flow in the entrance pipe of the radial pump. The appearance of the prerotation flow is a result of complicated fluid flow model, which appears as a consequence of the pump operating out of design point and reduce the pump efficiency. The goal of this contribution is in estimating the adequate measuring method, taking into account the inconvenience of conventional Laser – Doppler anemometry. Therefore, two measuring methods – multiblade (ASB) and single blade anemometer (ASSB) are introduced, analyzed and compared with well known 2 channel hot wire anemometry (HWA). The advantages of the introduced measuring system - ASB are in its simple construction and simple use and its low price. Direction and the swirl flow intensity in the entrance pipe of radial pumps and fans, using this method, could be measured.

Keywords

prerotation, radial fan, CFD

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PWC-2003-TC9-014.pdf

DOI

-

IMEKO TC

TC9 - Flow Measurement

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