Numerical and experimental investigation of H2-air and H2O2 detonation parameters in a 9 m long tube, introduction of a new detonation model

Malik, Konrad; Żbikowski, Mateusz; Bąk, Damian; Lesiak, Piotr; Teodorczyk, A.

doi:10.1016/j.ijhydene.2018.04.161

Cited by 8 publications

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“…Similarly, the combustion products matrix as a function of the initial temperature, pressure, and composition is precalculated and accessed while the simulation progresses. Some memory saving modification for this methodology using a multiple regression model was introduced and tested in the recent paper of Malik et al [27]. An additional advantage of ddtFoam is the presence of a shock wave sub-grid model to better capture the progress of the shock wave induced temperature rise within a single cell.…”

Section: Introductionmentioning

confidence: 99%

“…Such a combination leads to greater accuracy of the results at course grids. Up to date, the ddtFoam has been used to investigate the DDT process in mixtures with hydrogen concentration gradients, large scale experiments with and without adaptive mesh refinement [28], smooth channels with mixtures of hydrogen-oxygen [27], and channels with obstacles [29].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulations of DDT Limits in Hydrogen-Air Mixtures in Obstacle Laden Channel

Rudy

Teodorczyk

2020

Energies

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The main aim of this study was to perform numerical simulations of deflagration to detonation transition process (DDT) in hydrogen–air mixtures and assess the capabilities of freeware open-source ddtFoam code to simulate and capture DDT limits. The numerical geometry was based on the real 0.08 × 0.11 × 4 m (H × W × L), rectangular cross-section detonation channel previously used to experimentally investigate DDT limits in obstacle-filled channel. The constant blockage ratio (BR) equal to 0.5 was kept for three obstacle spacing configurations: S = H, 2H, 3H. The results showed that hydrogen concentration limits for successful DDT from simulations are close to the experimental values, however, the simulated DDT limits range is wider than the experimental one and depends on the obstacles spacing. The numerical results were analyzed by means of propagation velocities, overpressures, and run-up distances. The best match between numerical and experimental DDT limits was observed for obstacles spacing L = 3H and the lowest match for spacing L = H. The comparison between experimental and numerical results points at the possible application of ddtFoam in geometry with a relatively low level of congestion. This work results proved that simulations in such geometry provide numerical flame acceleration velocity profiles, run-up distance, and recorded overpressures very close to experimentally measured.

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Section: Introductionmentioning

confidence: 99%