Application of acoustic oscillations in quenching of gas burner flame

Niegodajew, Paweł; Łukasiak, Korneliusz; Radomiak, H.; Musiał, D.; Zajemska, M.; Poskart, A.; Gruszka, K.

doi:10.1016/j.combustflame.2018.05.007

Cited by 28 publications

(16 citation statements)

References 12 publications

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“…Based on the extinguishing excellence of the low-frequency sound 14 , a frequency band varying from 50 to 70 Hz was selected. This frequency was slightly higher than the band from 30 to 50 Hz used in other experiments 7 , 8 , where their sound fields were all amplified by a cylindrical tube. As such, the sound field used in this work was free to develop rather than being intensified as before, and thus a much higher speaker power was required for extinction.…”

Section: Experimental Methodsmentioning

confidence: 70%

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Fluctuation and extinction of laminar diffusion flame induced by external acoustic wave and source

Xiong

Liu

Fan

et al. 2021

Sci Rep

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Acoustic wave can destabilize the flame and has a potential in firefighting, but the influences of the sound source and its frequency are still poorly understood. This work applies a loudspeaker to extinguish a laminar diffusion propane flame of 5–25 mm high, where the local sound frequency is 50–70 Hz and sound pressure is 0.8–3.2 Pa (92.0–104.1 dB). Results reveal a constant flame pulsating displacement at the extinction limit, independent of the sound environment used. Such a flame pulsating displacement is found to be caused by the motion of the speaker membrane (or diaphragm) and its induced wind, which could be two orders of magnitude larger than the displacement of the air that transmits acoustic wave. Thus, under the influence of sound source, a critical flame strain rate, stretched by the pulsating airflow, can be formulated to characterize the blow-off limit better than the local sound pressure. The sound source with a lower frequency can produce larger pulsating displacements of both membrane and flame, and thus promoting extinction. This work improves the understanding of flame dynamics under the external sound field and source, and it helps establish a scientific framework for acoustic-based fire suppression technologies.

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Section: Experimental Methodsmentioning

confidence: 70%

“…Niegodajew et al . 8 further used a schlieren apparatus to observe the acoustic-induced extinction process. It is worth noting that all the above studies used cylindrical tubes or collimators to converge and intensify acoustic waves, and the flames tested were all very close to the free end of the tubes used (≤ 60 mm).…”

Section: Introductionmentioning

confidence: 99%

Fluctuation and extinction of laminar diffusion flame induced by external acoustic wave and source

Xiong

Liu

Fan

et al. 2021

Sci Rep

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“…In the vast majority of studies, liquid fuels were used for the generation of flames. It is noticeable that, apart from the studies conducted in Poland, there is practically no research on the possibility of extinguishing flames using gaseous fuel, e.g., [ 17 , 47 , 48 , 49 , 50 ]. There is a lack of experimental studies that contain information on the influence of the distance of the device output from the flame source, produced with gaseous fuel, on the extinguishing process.…”

Section: Fire Extinguishingmentioning

confidence: 99%

A Review of Environmentally Friendly Approaches in Fire Extinguishing: From Chemical Sciences to Innovations in Electrical Engineering

Yılmaz-Atay

Wilk-Jakubowski

2022

Polymers

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After the invention of fire, the fight against fire probably started, and it has been going on for thousands of years. During this time, the aim has always been to extinguish the fire as soon as possible and to produce fire-resistant materials. Symmetry plays an important role in reducing problems, as it is a common feature of modern life. Multidimensional signal processing has many applications, an example of which is the use of appropriately timed acoustic waves to extinguish flames. This article provides a brief review of issues related to the use of acoustic waves for flame suppression based on studies in the literature. In addition, measurement results available in the literature obtained using a high-power acoustic extinguisher are discussed as a review of the scientific literature. Furthermore, we provide the latest information on the situation of flame retardants, including the latest innovations in basic sciences. In this sense, from intrinsically fire-resistant materials to flame-retardant additives and nanocomposites, new processes and applications are briefly mentioned.

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“…Mechanical waves are used to extinguish the flame [8], and phononic structures can be used to direct and focus the beam. Phononic crystals can also be used as sensors, selective acoustic filters or noise suppressors [9,10].…”

Section: Introductionmentioning

confidence: 99%

Transmission Properties of Two-Dimensional Chirped Phononic Crystal

2019

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The mechanical wave transmission was investigated by a two-dimensional structure made of rods with a periodic arrangement-as the base structure. Compared structures had the same network constant in the direction perpendicular to the propagation of the acoustic wave, while the distances of subsequent layers of phononic crystal increased by a certain factor k. Depending on parameter k, chirped phononic crystal transmission properties were tested. The numerical analysis uses the finite difference time domain algorithm. The discrete Fourier transform allowed to determine the frequency characteristics of the tested systems. In order to verify numerical data, the experimental data was analyzed.

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Application of acoustic oscillations in quenching of gas burner flame

Cited by 28 publications

References 12 publications

Fluctuation and extinction of laminar diffusion flame induced by external acoustic wave and source

Fluctuation and extinction of laminar diffusion flame induced by external acoustic wave and source

A Review of Environmentally Friendly Approaches in Fire Extinguishing: From Chemical Sciences to Innovations in Electrical Engineering

Transmission Properties of Two-Dimensional Chirped Phononic Crystal

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