TY - GEN
T1 - QUASI-TWO-DIMENSIONAL NUMERICAL MODEL FOR SHOCK WAVE REFORMERS
AU - Madiot, Ghislain
AU - Mahmoodi-Jezeh, S. V.
AU - Tüchler, Stefan
AU - Davidson, Mark
AU - Akbari, Pejman
AU - Copeland, Colin D.
N1 - Funding Information:
The authors would like to thank and acknowledge New Wave Hydrogen, Inc. (NWH2) and co-funding groups including, Emissions Reduction Alberta (ERA), TotalEnergies, the Natural Gas Innovation Fund (NGIF) and its members, and GRTgaz.
PY - 2022/10/28
Y1 - 2022/10/28
N2 - The article details a numerical investigation of methane pyrolysis inside a shock wave reformer using a quasi-2dimensional (Q2D) Reynolds-Averaged Navier–Stokes (RANS) CFD model. This work is in support of the New Wave Hydrogen, Inc. (NWH2) proprietary technology development. To take account of the characteristics of the flow in the presence of shock waves, a simplified approach is proposed that captures the gas dynamics during partial opening with a lower computational cost suitable for the wave reformer design. The model is based on the three-dimensional, compressible, and unsteady Navier-Stokes equation coupled with k −ω - SST turbulence closure. Boundary conditions are implemented through a cell-centered approach with fictitious cells outside of the domain boundaries. The numerical results are compared with solutions from a quasi-one-dimensional (Q1D) unsteady model reported in literature. The simulations show a good agreement between the two different modelling approaches in terms of spatial distribution of the pressure gradient for one complete cycle. It is observed from the Q2D results that the entrance for each passage, especially upon opening of the high-pressure driver gas port, is a location of particular interest in the formation of the shock. The resulting acute pressure gradients induce loss inside the channel, decreasing the maximum temperature during a complete wave cycle by 15%, and consequently, reducing the methane pyrolysis process.
AB - The article details a numerical investigation of methane pyrolysis inside a shock wave reformer using a quasi-2dimensional (Q2D) Reynolds-Averaged Navier–Stokes (RANS) CFD model. This work is in support of the New Wave Hydrogen, Inc. (NWH2) proprietary technology development. To take account of the characteristics of the flow in the presence of shock waves, a simplified approach is proposed that captures the gas dynamics during partial opening with a lower computational cost suitable for the wave reformer design. The model is based on the three-dimensional, compressible, and unsteady Navier-Stokes equation coupled with k −ω - SST turbulence closure. Boundary conditions are implemented through a cell-centered approach with fictitious cells outside of the domain boundaries. The numerical results are compared with solutions from a quasi-one-dimensional (Q1D) unsteady model reported in literature. The simulations show a good agreement between the two different modelling approaches in terms of spatial distribution of the pressure gradient for one complete cycle. It is observed from the Q2D results that the entrance for each passage, especially upon opening of the high-pressure driver gas port, is a location of particular interest in the formation of the shock. The resulting acute pressure gradients induce loss inside the channel, decreasing the maximum temperature during a complete wave cycle by 15%, and consequently, reducing the methane pyrolysis process.
KW - hydrogen
KW - methane pyrolysis
KW - shock heating
KW - wave chemical reactor
KW - wave reformer
KW - wave rotor
UR - http://www.scopus.com/inward/record.url?scp=85141383863&partnerID=8YFLogxK
U2 - 10.1115/GT2022-80865
DO - 10.1115/GT2022-80865
M3 - Chapter in a published conference proceeding
AN - SCOPUS:85141383863
T3 - Proceedings of the ASME Turbo Expo
BT - Coal, Biomass, Hydrogen, and Alternative Fuels; Controls, Diagnostics, and Instrumentation; Steam Turbine
PB - The American Society of Mechanical Engineers(ASME)
T2 - ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
Y2 - 13 June 2022 through 17 June 2022
ER -