Zobrazeno 1 - 10
of 37
pro vyhledávání: '"W. K. Bushe"'
Autor:
W. K. Bushe, Graham R. Hendra
Publikováno v:
Combustion and Flame. 205:484-505
A novel model for the source term in RANS/LES of turbulent combustion, the Uniform Conditional State (UCS) model, is derived. The UCS model can be viewed as both a generalization and a specialization of Conditional Moment Closure (CMC): a generalizat
Autor:
W. K. Bushe, Hong Pak Tsui
Publikováno v:
Combustion Theory and Modelling. 20:812-833
A modified version of the Least-Square QR-factorisation (LSQR) algorithm has been implemented in conjunction with Conditional Source-term Estimation (CSE) for lean, turbulent premixed methane–air combustion via Large Eddy Simulation (LES). The iter
Publikováno v:
Combustion and Flame. 165:208-222
We present a direct comparison between the predicted and measured probability density functions (PDF) of the reaction progress variable and conditioned values of the scalar dissipation rates (SDR) in premixed turbulent flames. The predictions are bas
Autor:
W. K. Bushe, H. P. Tsui
Publikováno v:
Flow, Turbulence and Combustion. 93:487-503
A tabulated, pseudo-turbulent Probability Density Function (PDF) model for premixed combustion is proposed. The Linear-Eddy Model (LEM) is used to construct the PDFs for a temperature-based progress variable in a premixed, turbulent methane/air V-fla
Publikováno v:
Combustion Theory and Modelling. 16:301-320
Conditional Source-term Estimation (CSE) is a closure model for turbulence–chemistry interactions. This model uses the first-order CMC hypothesis to close the chemical reaction source terms. The conditional scalar field is estimated by solving an i
Publikováno v:
Combustion Science and Technology. 183:20-42
The effects of hydrogen addition on the ignition and combustion of a high-pressure methane jet in a quiescent charge of high-temperature, medium-pressure air were investigated numerically and experimentally. Subsequently, the results of these two fun
Publikováno v:
Combustion Theory and Modelling. 14:855-874
A Reynolds averaged Navier–Stokes (RANS) based combustion model, which incorporated the conditional source-term estimation (CSE) method for the closure of the chemical source term and the trajectory generated low-dimensional manifold (TGLDM) method
Autor:
Mohammad Salehi, W. K. Bushe
Publikováno v:
Combustion Theory and Modelling. 14:381-403
In this work, a turbulent premixed Bunsen flame is simulated using a RANS approach for turbulence and a flamelet model for turbulence–chemistry interactions. In this flamelet model, the mean reaction rates are approximated using a progress variable
Publikováno v:
Fuel. 89:752-759
This work investigates the implications of natural-gas composition on the combustion in a heavy-duty natural-gas engine and on the associated pollutant emissions. In this engine system, natural gas is injected into the combustion chamber shortly befo
Publikováno v:
International Journal of Engine Research. 10:1-13
Adding hydrogen to the fuel in a direct injection natural gas engine offers the potential significantly to reduce local and global air pollutant emissions. This work reports on the effects of fuelling a heavy-duty engine with late-cycle direct inject