Experimental analysis of the acoustic field of an ultrasonic pulse induced by a fluidic switch

Bühling, Benjamin; Strangfeld, Christoph; Maack, Stefan; Schweitzer, Thorge

doi:10.1121/10.0003937

Cited by 11 publications

(14 citation statements)

References 37 publications

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“…For the piezoelectric transducer the flow outlet plane coincides with the actuation plane. The figure has been adapted from the accompanying study [1] , with the measurement planes being added for this publication. …”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…The fluidic ultrasonic transducer was connected to a constant source of pressurized air, where a pressure of 1.85 bar was applied to the supply port, 1.2 bar to the passive control port and 1.4 bar to the active control port. Further description of the transducer layout can be found in the accompanying study [1] . A Festo MHJ10 solenoid valve was used to control the active port.…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…The time signal was then partitioned into 100 parts, one for each switching cycle. In each partition four time intervals of equal length were chosen, that corresponded to the stable states and switching intervals of each cycle, as outlined in the accompanying paper [1] . These time intervals are given in Table 1 .…”

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

“…For the acoustic measurement the whole switching cycle was acquired, for flow measurements the switch was operated in static mode. Data source location Institution: Federal Institute for Materials Research and Testing (BAM) City/Town/Region: Berlin Country: Germany Data accessibility Repository name: Harvard Dataverse Data identification number: https://doi.org/10.7910/DVN/OQYPC9 [2] Related research article Benjamin Bühling, Christoph Strangfeld, Stefan Maack, and Thorge Schweitzer, “Experimental analysis of the acoustic field of an ultrasonic pulse induced by a fluidic switch”, The Journal of the Acoustical Society of America 149, 2150-2158 (2021) https://doi.org/10.1121/10.0003937 [1] …”

Section: Specifications Tablementioning

confidence: 99%

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Acoustic and flow data of fluidic and piezoelectric ultrasonic transducers

et al. 2021

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This data article presents characteristic acoustic and flow data of a fluidic ultrasonic transducer as well as acoustic data of a commercial piezoelectric ultrasonic transducer used in non-destructive testing for civil engineering. The flow data has been acquired using hot-wire anemometry and a Pitot tube. The three-dimensional acoustic data of both devices has been acquired using a calibrated microphone. The distribution of characteristic acoustic properties of both transducers are extracted and given in addition to the raw data. The data presented in the article will be a valuable source for reference and validation, both for developing fluidic and alternate ultrasound generation technologies. Furthermore, they will give additional insight into the acoustic-flow interaction phenomena of high speed switching devices. This article is accompanying the paper Experimental Analysis of the Acoustic Field of an Ultrasonic Pulse Induced by a Fluidic Switch (Bühling et al., 2021) published in The Journal of the Acoustical Society of America, where the data is interpreted in detail and the rationale for characteristic sound properties of the fluidic transducer are given.

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Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Section: Experimental Design Materials and Methodsmentioning

confidence: 99%

Section: Specifications Tablementioning

confidence: 99%

See 2 more Smart Citations

Acoustic and flow data of fluidic and piezoelectric ultrasonic transducers

et al. 2021

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“…To provide robust means of testing large concrete structures a fluidic transducer based on a bistable fluidic amplifier was developed. Initial research conducted in [9] have shown that the generation of a broadband ultrasonic signal between 30 kHz and 80 kHz is possible. Fluidic devices also include fluidic oscillators [10,11] that have offered many solutions to modern engineering problems.…”

Section: Introductionmentioning

confidence: 99%

Switching Action of a Bistable Fluidic Amplifier for Ultrasonic Testing

Schweitzer

Hörmann

Bühling

et al. 2021

Fluids

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Air-coupled ultrasonic testing is widely used in the industry for the non-destructive testing of compound materials. It provides a fast and efficient way to inspect large concrete civil infrastructures for damage that might lead to catastrophic failure. Due to the large penetration depths required for concrete structures, the use of traditional piezoelectric transducer requires high power electric systems. In this study, a novel fluidic transducer based on a bistable fluidic amplifier is investigated. Previous experiments have shown that the switching action of the device produces a high-power broadband ultrasonic signal. This study will provide further insight into the switching behaviour of the fluidic switch. Therefore, parametric CFD simulations based on compressible supersonic RANS simulations were performed, varying the inlet pressure and velocity profiles for the control flow. Switching times are analyzed with different methods, and it was found that these are mostly independent of the slope of the velocity profile at the control port. Furthermore, it was found that an inversely proportional relationship exists between flow velocity in the throat and the switching time. The results agree with the theoretical background established by experimental studies that can be found in the literature.

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Fluidic Ultrasound Generation for Non‐Destructive Testing

Bühling,

Maack,

Strangfeld

2024

Advanced Materials

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Air‐coupled ultrasonic testing (ACU) is a pioneering technique in non‐destructive testing (NDT). While contact testing and fluid immersion testing are standard methods in many applications, the adoption of ACU is progressing slowly, especially in the low ultrasonic frequency range. A main reason for this development is the difficulty of generating high amplitude ultrasonic bursts with equipment that is robust enough to be applied outside a laboratory environment. This paper presents the fluidic ultrasonic transducer as a solution to this challenge. This novel aeroacoustic source uses the flow instability of a sonic jet in a bistable fluidic switch to generate ultrasonic bursts up to 60 kHz with a mean peak pressure of 320 Pa. The robust design allows operation in adverse environments, independent of the operating fluid. Non‐contact through‐transmission experiments are conducted on four materials and compared with the results of conventional transducers. For the first time, it is shown that the novel fluidic ultrasonic transducer provides a suitable acoustic signal for NDT tasks and has potential of furthering the implementation of ACU in industrial applications.This article is protected by copyright. All rights reserved

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Experimental analysis of the acoustic field of an ultrasonic pulse induced by a fluidic switch

Cited by 11 publications

References 37 publications

Acoustic and flow data of fluidic and piezoelectric ultrasonic transducers

Acoustic and flow data of fluidic and piezoelectric ultrasonic transducers

Switching Action of a Bistable Fluidic Amplifier for Ultrasonic Testing

Fluidic Ultrasound Generation for Non‐Destructive Testing

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