Active control of pressure pulsations in piping systems

Document type: Researchreports
Full text:
Author(s): Julien Maillard, Thomas L Lagö, Mathias Winberg, Chris Fuller
Title: Active control of pressure pulsations in piping systems
Series: Research Report
Year: 1998
Issue: 17
ISSN: 1103-1581
Organization: Blekinge Institute of Technology
Department: Dept. of Signal Processing (Institutionen för signalbehandling)
Dept. of Signal Processing S-372 25 Ronneby
+46 455 780 00
http://www.hk-r.se/isb/isb_en.html
Authors e-mail: julien.maillard@its.hk-r.se
Language: English
Abstract: Fluid-borne vibrations in piping systems remains a serious problem
in applications such as marine vessels where mechanical fatigue and
radiated noise are critical factors. In the case of pumps or
hydraulic engines, the main source of vibrational energy is in the
fluid axisymmetric plane wave associated with the system pressure
pulsations. Due to fluid/structure coupling, this wave propagates
in both the pipe wall and fluid. For high levels of pressure
pulsations, the resulting radial and axial wall motion can then
cause mechanical fatigue and unwanted radiated noise. Passive
pulsations dampers have been used traditionally to reduce the fluid
pressure pulses. The use of such passive devices is limited however
in critical applications due to the resulting static pressure loss
which decreases the system performance. This report describes the
design and testing of a non-intrusive fluid wave actuator for the
active control of pressure pulses. The actuator consists of a
circumferential ring of PZT stacks acting on the pipe outside wall
to generate an axisymmetric plane wave in the fluid through radial
motion coupling. After briefly describing a simplified model of the
actuator along with predicted performances, experimental results
will show the control performance of the actuator applied to the
discharge line of an oil driven hydraulic engine.
Subject: Signal Processing\Active Noise and Vibration Control
Keywords: active vibration control, fluid-filled pipe
URN: urn:nbn:se:bth-00080
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