Numerical investigation on the effect of obstacles on DDT in hydrogen-air mixure using OpenFOAM

• Autorzy: Porowski R. , Siatkowski S.
• Języki publikacji: EN

Abstrakty

EN

During past decades a lot of effort was put into DDT and detonation research both experimental and numerical. However the size of a domain, in which we can simulate DDT is very limited due to computer performance. In days to come, the next challenge will be to create numerical model that would allow us to simulate huge domains such as hydrogen leaks in nuclear power plants. An attempt to create such model was taken by Ettner (2014) who created ddtFOAM solver running on OpenFOAM package dedicated to simulate deflagration-to-detonation transition without resolving all microscopic details of the flow (only 2D simulations). According to Ettner (2014) it works on relatively coarse grid (1x1mm) and shows good agreement with experiments. The purpose of this paper was to investigate the influence of obstacles on DDT and detonation in tube filled with stoichiometric hydrogen-air mixture using ddtFOAM solver for the same geometry as Porowski’s experiments (2013). This work was restricted only to hydrogen-air mixture although in the future it is planned to be extended to other mixtures that Porowski (2013) used in his experiments. Simulated geometry included the tube with length L = 6 m and D=140 mm. Twelve different configurations of obstacle were used, various parameters as BR (Blockage Ratio) ranging from 0.4 to 0.7 and obstacle spacing between 1D and 3D. Our study showed that model captured general features of detonations such as velocity or pressure peak, fairly well. However not always results of simulation was in agreement with experimental studies. Main disagreement was in predicting if DDT occurred or not. Simulations showed steady-state detonation protruding in every case while in experiments sometimes flame propagated in quasi-detonation regime. It should be noted though, that this model is supposed to give more qualitative than quantitative results. Some possible causes for this disagreement of results are then analysed.

Słowa kluczowe

EN

DDT; numerical simulations; ddtFOAM; hydrogen safety

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2017
• Tom: Vol. 37 nr 1
• Strony: 15--24
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Porowski R.

• Warsaw University of Technology Institute of Heat Engineering Nowowiejska 21/25, 00-665 Warsaw, Poland

autor

Siatkowski S.

• Warsaw University of Technology Institute of Heat Engineering Nowowiejska 21/25, 00-665 Warsaw, Poland

Bibliografia

• [1] Ettner F., Vollmer K. G., Sattelmayer T. (2014), Numerical Simulation of the Deflagration-to-Detonation Transition in Inhomogeneous Mixtures, Journal of Combustion, vol. 2014, Article ID 686347
• [2] Porowski R., Teodorczyk A.(2013), Experimental study on DDT for hydrogen-methane-air mixtures in tube with obstacles, Journal of Loss Prevention in the Process Industries, vol. 26: 374 – 379
• [3] Issa R.I., (1986), Solution of the implicitly discretised fluid flow equations by operator-splitting, Journal of Computational Physics, vol. 62: 40-65
• [4] Chapman, W. R., & Wheeler, R. N. (1926), The propagation of flame in mixtures of methane and air, Journal of the Chemical Society, 2139
• [5] Teodorczyk, A., Lee, J. H. S., & Knystautas, R. (1988), Propagation mechanisms of quasi-detonations, Proceedings of the Combustion Institute, 22
• [6] Shepherd, J. E., & Lee, J. H. S. (1992), On the transition from deflagration to detonation,
• [7] In P. Hussaini, P. Kumar, & P. Voigt (Eds.), Major research in combustion
• [8] Gamezo V. N., Ogawa T., Oran E. S. (2007), Numerical simulations of flame propagation and DDT in obstructed channels filled with hydrogen-air mixture, Proceeding of the Combustion Institute, vol. 31: 2463 – 2471
• [9] Gamezo V. N., Ogawa T., Oran E. S. (2008), Flame acceleration and DDT in channels with obstacles: Effect of obstacle spacing, Combustion and Flame, vol. 155: 302 – 315
• [10] Kessler D. A., Gamezo V. N., Oran E. S., Zipf R. K.(2009), Simulation of Deflagration-to-Detonation Transition in Premixed CH4 – Air in Large-Scale Channels with Obstacles, 47th AIAA Aerospace Sciences Meeting Including The New Forum and Aerospace Exposition 5 – 8 January 2009, Orlando, Florida
• [11] Khokhlov A. M., Oran E. S., Thomas G. O.(1999), Numerical Simulations of Deflagration-to-Detonation Transition: The Role of Shock – Flame Interactions in Turbulent Flames, Combustion and Flame, vol. 117: 323-339
• [12] Gamezo V. N., Khokhlov A. M., Oran E. S. (2001), The Influence of Shock Bifurcations on Shock – Flame Interactions and DDT, Combustion and Flame, col. 126: 1810 – 1826
• [13] Valiev D., Bychkov V., Akkerman V., Law Ch. K., Eriksson L. E. (2010), Flame acceleration in channels with obstacles in the deflagration-to-detonation transition, Combustion and Flame, vol. 157: 1012 – 1021
• [14] Ogawa T., Oran E. S., Gamezo V. N. (2013), Numerical study on flame acceleration and DDT in an inclined array of cylinders using AMR technique, Computers & Fluids, vol. 85: 63-70
• [15] Ogawa T., Oran E. S., Gamezo V. N. (2013), Flame acceleration and transition to detonation in an array of square obstacles, Journal of Loss Prevention in the Process Industries, vol. 26: 355 – 362
• [16] Dziemińska E., Hayashi A. K. (2013), Auto-ignition and DDT driven by shock wave – Boundary layer interaction in oxyhydrogen mixture, International Journal of Hydrogen Energy, vol. 38: 4185 – 4193
• [17] Thomas G. (2012), Some observations on the initiation and onset of detonation, Philosophical Transaction of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 370: 715-739

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).