scholarly journals Utilizing acoustic pressure waves for sensing fluid properties

2011 ◽  
Vol 25 ◽  
pp. 775-778 ◽  
Author(s):  
H. Antlinger ◽  
S. Clara ◽  
R. Beigelbeck ◽  
S. Cerimovic ◽  
F. Keplinger ◽  
...  
Keyword(s):  
Acoustic Pressure ◽  
Pressure Waves ◽  
Fluid Properties

Enhanced Water Removal from PEM Fuel Cells Using Acoustic Pressure Waves

2019 ◽  
Vol 166 (7) ◽  
pp. F3143-F3153 ◽  
Author(s):  
Mehdi Mortazavi ◽  
Anthony D. Santamaria ◽  
Jingru Z. Benner ◽  
Vedang Chauhan
Keyword(s):  
Fuel Cells ◽  
Acoustic Pressure ◽  
Pem Fuel Cells ◽  
Water Removal ◽  
Pressure Waves

A Comparison of Mechanical Wind Filters for Infrasound Sensor Noise Reduction

2021 ◽  
Author(s):  
Sarah McComas ◽  
Chris Hayward ◽  
Stephen Arrowsmith ◽  
Brian Stump ◽  
Mihan H. McKenna Taylor
Keyword(s):  
Data Analysis ◽  
Atmospheric Turbulence ◽  
Acoustic Pressure ◽  
Urban Setting ◽  
Pressure Waves ◽  
Earth Atmosphere ◽  
Acoustic Spectrum ◽  
Single Sensor ◽  
Insight Into

Abstract Infrasound sensors record the ambient acoustic field that contains not only signals of interest but also noise and clutter. Noise is defined as atmospheric turbulence that is incoherent over the distances of meters, whereas, signals of interest and clutter are acoustic pressure waves that are coherent over 10s of meters to 100s of kilometers. There is a growing interest in monitoring sources that extend across the acoustic spectrum from infrasound (below 20 Hz) into the low-end audible acoustic (20–1000 Hz). Monitoring of these extended band signals with a single sensor is made possible with the development of contemporary infrasound sensors, such as Hyperion IFS-3000 with a flat response from 0.01 to 1000 Hz. Combining infrasound sensors with seismometers provides opportunity to better assess noise contributions for both sensor types and improve characterization of sources that occur close to the solid earth–atmosphere boundary. Because sensors are installed to target these broadband acoustic sources, considerations need to be made when selecting a mechanical wind filter to mitigate the noise, while minimizing the impacts to the signals of interest across these frequency ranges. Motivated by these opportunities, this article compares traditional infrasound wind filter designs, that is, porous hoses rosettes and domes, in an urban setting for frequencies 0.01–45 Hz. Data analysis compares the filters, in terms of their response to noise and signals with direct comparisons of wind filters, as a function of frequency. The quantification of performance of these filters in an urban setting provides insight into their effects on detection of sources of interest in this environment.

A three PZT setup for determining physical liquid properties utilizing acoustic pressure waves

2013 ◽  
Author(s):  
H. Antlinger ◽  
S. Clara ◽  
B. Jakoby ◽  
R. Beigelbeck ◽  
S. Cerimovic ◽  
...  
Keyword(s):  
Acoustic Pressure ◽  
Pressure Waves

Advanced Pipeline Vibroacoustic Monitoring

2013 ◽  
Author(s):  
Giancarlo Bernasconi ◽  
Silvio Del Giudice ◽  
Giuseppe Giunta ◽  
Francesco Dionigi
Keyword(s):  
Environmental Sustainability ◽  
Oil And Gas ◽  
Surrounding Medium ◽  
Third Party ◽  
Pressure Waves ◽  
Elastic Parameters ◽  
Gas Industry ◽  
Acoustic Data ◽  
Key Factor ◽  
Fluid Properties

Remote real-time monitoring of pipelines reliability is becoming a key factor for the environmental sustainability of oil&gas industry. Multipoint Acoustic Sensing (MAS) technology makes use of multi sensors placed at discrete distances to detect Third Party Interference (TPI) and fluid leaks along the pipeline. In fact, any interaction with the pipe generates pressure waves that are guided within the fluid (gas or oil) for long distances, carrying information on the source event. Pressure propagation is mainly governed by the absorption coefficient and the sound speed. These parameters are in turn complicated functions of the frequency, the geometrical and elastic parameters of the pipe shell, the elastic parameters of the surrounding medium, and the acoustic and thermodynamic properties of the transported fluid. We have analyzed these aspects while processing acoustic data collected on crude oil and gas transportation pipelines, in different operational and flow conditions. This study describes the acquisition campaigns and the data analysis steps used for the experimental derivation of fluid properties and pipe anomalies. The results are also used for the validation of mathematical models of pressure waves propagation in fluid filled pipes.

Formation of a submillimeter bubble from an orifice using pulsed acoustic pressure waves in gas phase

2008 ◽  
Vol 20 (4) ◽  
pp. 043301 ◽  
Author(s):  
Minori Shirota ◽  
Toshiyuki Sanada ◽  
Ayaka Sato ◽  
Masao Watanabe
Keyword(s):  
Gas Phase ◽  
Acoustic Pressure ◽  
Pressure Waves
Sign in / Sign up

Export Citation Format

Share Document