Computation of turbulent reacting flow in a jet assisted ram combustor

Kumar, Sarvesh; Tamaru, Takashi

doi:10.1016/s0045-7930(96)00033-3

Cited by 5 publications

(3 citation statements)

References 5 publications

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Section: Introductionmentioning

confidence: 99%

“…The typical implementation of the flamelet model is based on a low Mach number assumption, explaining the still very limited number of studies of high-speed flows using this approach [21][22][23]. Kumar and Tamaru [23] used a laminar flamelet model to simulate a compressible ram combustor, where the temperature was interpolated from a flamelet library based on the mixture fraction and scalar dissipation rate. Oevermann [22] extended this model by computing the temperature from the internal energy and the species mass fractions, where the energy is determined from the solution of a transport equation, and the species mass fractions were interpolated from a flamelet table, based on the same parameters and without introducing any corrections to the low Mach number flamelet model.…”

Section: Introductionmentioning

confidence: 99%

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An efficient flamelet-based combustion model for compressible flows

Saghafian

Terrapon

Pitsch

2015

Combustion and Flame

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A combustion model based on a flamelet/progress variable approach for highspeed flows is introduced. In the proposed formulation, the temperature is computed from the transported total energy and tabulated species mass fractions. Only three additional scalar equations need to be solved for the combustion model. Additionally, a flamelet library is used that is computed in a pre-processing step. This approach is very efficient and allows for the use of complex chemical mechanisms. An approximation is also introduced to eliminate costly iterative steps during the temperature calculation. To better account for compressibility effects, the chemical source term of the progress variable is rescaled with the density and temperature. The compressibility corrections are analyzed in an a priori study. The model is also tested in both Reynolds-averaged Navier-Stokes (RANS) and large-eddy simulation (LES) computations of a hydrogen jet in a supersonic transverse flow.Comparison with experimental measurements shows good agreement, partic- * ularly for the LES case. It is found that the disagreement between RANS results and experimental data is mostly due to the mixing model deficiencies and the presumed probability density functions used in the RANS formulation. A sensitivity study of the proposed model shows the importance of the compressibility corrections especially for the source term of the progress variable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An efficient flamelet-based combustion model for compressible flows

Saghafian

Terrapon

Pitsch

2015

Combustion and Flame

View full text Add to dashboard Cite

show abstract

“…Whether the density-weighted PDF is used [4][5][6][7] or the un-weighted PDF is used [8][9][10], the shape of the PDF is normally presumed to be given by the β-function:…”

Section: Introductionmentioning

confidence: 99%