<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The Artificial Thickened Flame (ATF) method, which involves artificially increasing the flame thickness so as to simulate with a coarse grid resolution, is applied to reduce the computational cost of predicting the Deflagration to Detonation Transition (DDT) in a tube with repeated obstacles. While simulation results depended on the parameter <italic>N</italic> (the number of grid points in laminar flame thickness), it was found that <italic>N</italic> values of more than 10 may be excessive. The results show that the chosen simulation method predicts the flame speed as compared to a reference experiment and captures the detail of the strong ignitions near the corner between the obstacle and the sidewall. The present simulation also captures the wrinkle flame front structure during the acceleration of flame.</p>
</abstract>

The Artificial Thickened Flame (ATF) method, which involves artificially increasing the flame thickness so as to simulate with a coarse grid resolution, is applied to reduce the computational cost of predicting the Deflagration to Detonation Transition (DDT) in a tube with repeated obstacles. While simulation results depended on the parameter N (the number of grid points in laminar flame thickness), it was found that N values of more than 10 may be excessive. The results show that the chosen simulation method predicts the flame speed as compared to a reference experiment and captures the detail of the strong ignitions near the corner between the obstacle and the sidewall. The present simulation also captures the wrinkle flame front structure during the acceleration of flame.

Numerical Simulation of the Deflagration to Detonation Transition in a Tube with Repeated Obstacles: Experimental Scale Simulation Using the Artificial Thickened Flame Method

Department of Mechanical and Control Engineering

Safety Department, Safety and Quality Division, Japan Nuclear Fuel Limited

Transactions on Aerospace Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The Artificial Thickened Flame (ATF) method, which involves artificially increasing the flame thickness so as to simulate with a coarse grid resolution, is...

Numerical Simulation of the Deflagration to Detonation Transition in a Tube with Repeated Obstacles: Experimental Scale Simulation Using the Artificial Thickened Flame Method

Published Online: Dec 27, 2021

Page range: 41 - 52

DOI: https://doi.org/10.2478/tar-2021-0021

Keywords
detonation, Deflagration-to-Detonation Transition(DDT), Artificial Thickening Flame (ATF), obstacle

© 2021 Nobuyuki Tsuboi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Numerical Simulation of the Deflagration to Detonation Transition in a Tube with Repeated Obstacles: Experimental Scale Simulation Using the Artificial Thickened Flame Method

Published Online: Dec 27, 2021

Page range: 41 - 52

DOI: https://doi.org/10.2478/tar-2021-0021

Keywordsdetonation, Deflagration-to-Detonation Transition(DDT), Artificial Thickening Flame (ATF), obstacle

© 2021 Nobuyuki Tsuboi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
detonation, Deflagration-to-Detonation Transition(DDT), Artificial Thickening Flame (ATF), obstacle