Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles
A numerical investigation of the spray-induced turbulence generated from industrial spray nozzles is carried out to better understand the roles of the nozzle spray on the fires or explosions in different accidental scenarios. Numerical simulations are first validated against experimental data in the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/4/1135 |
| _version_ | 1797395797641265152 |
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| author | Guodong Gai Abdellah Hadjadj Sergey Kudriakov Stephane Mimouni Olivier Thomine |
| author_facet | Guodong Gai Abdellah Hadjadj Sergey Kudriakov Stephane Mimouni Olivier Thomine |
| author_sort | Guodong Gai |
| collection | DOAJ |
| description | A numerical investigation of the spray-induced turbulence generated from industrial spray nozzles is carried out to better understand the roles of the nozzle spray on the fires or explosions in different accidental scenarios. Numerical simulations are first validated against experimental data in the single nozzle case using the monodisperse and polydisperse assumption for droplet diameters. The polydispersion of the nozzle spray is proven to be necessary to correctly predict the gas and droplet velocities. The turbulent kinetic energy has dominant values inside the spray cone, decreases rapidly with the vertical distance from the spray nozzle, and is strongly affected by the spray droplet diameter. On the contrary, the integral length scale is found to have high values outside the spray cone. Two interacting sprays injected from different nozzles are then investigated numerically using the validated polydisperse model. The water sprays generated from such industrial nozzles can generate turbulence of high intensity in the near-nozzle region, and this intensity decreases with the distance from the nozzles. A better understanding of the turbulence generated by the spray system can be beneficial for the evaluation of several important phenomena such as explosion enhancement. The guideline values obtained from this investigation of single and double nozzles can be useful for large-scale numerical simulations. |
| first_indexed | 2024-03-09T00:40:54Z |
| format | Article |
| id | doaj.art-a8af0882e18b4af9bc44f5c0b32e6917 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T00:40:54Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a8af0882e18b4af9bc44f5c0b32e69172023-12-11T17:51:19ZengMDPI AGEnergies1996-10732021-02-01144113510.3390/en14041135Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation NozzlesGuodong Gai0Abdellah Hadjadj1Sergey Kudriakov2Stephane Mimouni3Olivier Thomine4DES-DM2S-STMF, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, FranceInstitute for Applied Sciences, INSA Rouen Normandie, Clean Combustion Laboratory, CORIA UMR 6614 CNRS, 76000 Rouen, FranceDES-DM2S-STMF, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, FranceEDF R&D, Fluid Dynamics Power Generation and Environment, 78401 Chatou, FranceAix Marseille University, LIS UMR 7020 CNRS, F-13397 Marseille, FranceA numerical investigation of the spray-induced turbulence generated from industrial spray nozzles is carried out to better understand the roles of the nozzle spray on the fires or explosions in different accidental scenarios. Numerical simulations are first validated against experimental data in the single nozzle case using the monodisperse and polydisperse assumption for droplet diameters. The polydispersion of the nozzle spray is proven to be necessary to correctly predict the gas and droplet velocities. The turbulent kinetic energy has dominant values inside the spray cone, decreases rapidly with the vertical distance from the spray nozzle, and is strongly affected by the spray droplet diameter. On the contrary, the integral length scale is found to have high values outside the spray cone. Two interacting sprays injected from different nozzles are then investigated numerically using the validated polydisperse model. The water sprays generated from such industrial nozzles can generate turbulence of high intensity in the near-nozzle region, and this intensity decreases with the distance from the nozzles. A better understanding of the turbulence generated by the spray system can be beneficial for the evaluation of several important phenomena such as explosion enhancement. The guideline values obtained from this investigation of single and double nozzles can be useful for large-scale numerical simulations.https://www.mdpi.com/1996-1073/14/4/1135spray nozzlespray-induced turbulencepolydisperse sprayturbulence intensity |
| spellingShingle | Guodong Gai Abdellah Hadjadj Sergey Kudriakov Stephane Mimouni Olivier Thomine Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles Energies spray nozzle spray-induced turbulence polydisperse spray turbulence intensity |
| title | Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles |
| title_full | Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles |
| title_fullStr | Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles |
| title_full_unstemmed | Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles |
| title_short | Numerical Study of Spray-Induced Turbulence Using Industrial Fire-Mitigation Nozzles |
| title_sort | numerical study of spray induced turbulence using industrial fire mitigation nozzles |
| topic | spray nozzle spray-induced turbulence polydisperse spray turbulence intensity |
| url | https://www.mdpi.com/1996-1073/14/4/1135 |
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