The article provides the results of studies and developments aimed at addressing the problem of smoke deposition (coagulation) in order to increase the efficiency of fire suppression (detection of ignition source) and ensure the evacuation of people from the smoke generation center. The possibility and efficiency of affecting smoke with mechanical oscillations of ultrasound frequency with the high level of sound pressure able to implement the process of acoustic coagulation, i.e., merging solid particles with the subsequent deposition, have been considered. For the practical implementation of smoke deposition and elimination of flaws in the existing ultrasonic exposure, specialized ultrasonic equipment with improved performance characteristics and reduced overall dimensions has been designed, developed, and manufactured. The practical use of the developed ultrasonic emitter weighing less than 1 kg ensured the ultrasonic exposure with a sound pressure level of 148–149 dB at the frequency of 22,5 kHz. The performed tests confirmed the high efficiency of the developed ultrasonic emitter during the deposition of smoke generated within the process of wood combustion. The tests have also indicated the potential improvement in smoke deposition efficiency by sound pressure increase and helped to outline the areas of further research.
2. Mishuev A.V. MPK E21F5/00. Method to prevent the explosion of the methane-coal-air mixture and a device to implement it. Patent № 2129211. R.F. Applied: March 5, 1998. Published: April 20, 1999. (In Russ.).
3. Khmelev V.N., Shalunov A.V., Shalunova K.V., Tsyganok S.N., Barsukov R.V., Slivin A.N. Ultrasonic coagulation of aerosols: monograph. Biysk: Izd-vo Altayskogo gos. tekhn. un-ta, 2010. 241 p. (In Russ.).
4. Akimov M.N., Zvonov V.S., Ostakh S.V. MPK A62S2/00. Method of smoke deposition. Patent № 2069576. R.F. Applied: January 10, 1992. Published: November, 27, 1996. (In Russ.).
5. Kostromina E.I., Zanina I.A. Reducing the smoke level of evacuation routes in case of fire in multi-storey public buildings by using ultrasonic coagulation. Inzhenernyy vestnik Dona = Engineering Journal of Don. 2018. №1. (In Russ.).
6. Liu J., Zhang G., Zhou J., Wang J., Zhao W., Cen K. Experimental study of acoustic agglomeration of coal-fired fly ash particles at low frequencies. Powder Technology. 2009. Vol. 193. № 1. pp. 20–25. DOI:10.1016/j.powtec.2009.02.002
7. Wang Z., Wang X., Huang Y., Tao C., Zhang H. Experimental study on fire smoke control using water mist curtain in channel. Journal of Hazardous Materials. 2018. Vol. 342. pp. 231–241. DOI:10.1016/j.jhazmat.2017.08.026
8. Zhang G., Ma Z., Shen J., Zhang K., Wang J., Chi Z. Experimental study on eliminating fire smokes using acoustic agglomeration technology. Journal of Hazardous Materials. 2020. Vol. 382. DOI: 10.1016/j.jhazmat.2019.121089
9. Kadyrov A.S., Sarsembekov B.K., Ganyukov A.A., Zhunusbekova Z., Alikarimov K.N. Experimental Research of the Coagulation Process of Exhaust Gases under the Influence of Ultrasound. Communications. 2021. № 23 (4). DOI: 10.26552/com.C.2021.4.B288-B298
10. Khmelev V.N., Shalunov A.V., Golykh R.N., Dorovskikh R.S., Nesterov V.A., Bobrova G.A. Study of the influence of secondary modes of vibrations on the uniformity of the distribution of working ring disk of ultrasonic disk radiators. Conference Proceedings of 18th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, EDM 2017. 2017. pp. 290–293. DOI: 10.1109/EDM.2017.7981758
11. Khmelev V.N., Shalunov A.V., Dorovskikh R.S., Golykh R.N., Nesterov V.A. Measurement of acoustic power introduced into the gas medium ultrasonic devices with disk radiators. Datchiki i sistemy = Sensors and Systems. 2016. № 5 (203). pp. 3–11. (In Russ.).
12. Khmelev V.N., Shalunov A.V., Nesterov V.A., Tsyganok S.N., Terentev S.A., Sinkin A.A. Ultrasonic oscillating system for gaseous media. MPK B06B 1/06. Patent 2822084. R.F. Applied: March 22, 2024. Published: July 1, 2024. (In Russ.).
13. Yuan D., Zhang G., Lin C., Lv H., Zhang K., Lin F., Gu H. Fast elimination of cable fire smoke in underground tunnels using acoustic agglomeration technology. Tunnelling and Underground Space Technology. 2021. Vol. 117. DOI: 10.1016/j.tust.2021.104154
14. Wang K., Gu H., Zhang G., Luo K., Zhang Q., Chen G., Zhan M., Chi Z.. A Novel Fire Smoke Elimination Technology Using Electric Agglomeration: The Concept, Experimental Verification and Mechanisms. SSRN Electronic Journal. 2022. DOI: 10.2139/ssrn.4115285