2025 SMSI Bannerklein

D2.3 - Numerical Investigation of Unsteady Flowfield of DN25 Flow Meter with Pressure Chamber

Event
AMA Conferences 2013
2013-05-14 - 2013-05-16
Nürnberg
Band
Proceedings SENSOR 2013
Chapter
D2 - Flow Sensor II
Author(s)
A. Gedikli, H. Krisch - Krohne Messtechnik GmbH, Duisburg (Germany), E. von Lavante - University od Duisburg-Essen (Germany)
Pages
501 - 507
DOI
10.5162/sensor2013/D2.3
ISBN
978-3-9813484-3-9
Price
free

Abstract

In the present investigation, a new design flow meter with pressure detection has been optimized and investigated numerically. In the classical design of the KROHNE flow meter a paddle is used as a sensor, containing piezoelectric elements. When flow passes around a bluff body periodic flow separation develops which is responsible for the oscillation of the paddle. Thus the piezoelectric elements transform the mechanical movement of the paddle in electrical signal which can be evaluated in signal processing. Such a sensor construction is restricted to medium temperatures until 240°C. In order to achieve an accurate measurement at higher temperatures, for example at 500°C, a new design flow meter has been developed. Instead of using a paddle which is positioned to detect periodic flow fluctuations, the periodic change of pressure is detected through two openings which are positioned at the side wall close to the bluff body and leading to a pressure chamber. The periodically changing pressure acts on a membrane and thus with a suitable sensor design it is possible to detect the underlying frequency.

Download