Numerical Modeling of Flow and Combustion in a Single-Element GCH4/GOX Rocket Combustor: Aspects of Turbulence Modeling

Numerical Investigation of Flow and Combustion in a Single Element GCH4/Gox Rocket Combustor

“…While IVLR uses a ω-based model, JAXA uses an ε-based one which has been shown to predict a stronger mixing. 3 The ADS simulation overestimates the heat flux in the first part of the chamber substantially, but comes closer to the experimental data towards the combustor end. ADS uses a combustion model that assumes local chemical equilibrium in every computational cell explaining the comparatively high values for the heat output.…”

“…This is probably related to the fact that LFA and TD use the lowest value for the turbulent Schmidt number as well as a k-ε turbulence model, which has shown to predict a stronger mixing compared to the ω-based models. 3 In contrast the stoichiometric contour predicted by CERFACS opens quickly and touches the wall at about half of the chamber length.…”

“…As part of the effort, studies of more specific aspects of the modeling approaches have been conducted in separate publications. The aspect of turbulence modeling is discussed in the publication by Chemnitz et al 3 The modeling of chemistry and turbulence chemistry interaction is presented by Maestro et al 4 The efforts to simulate the test case using Large Eddy Simulation (LES) are presented by Müller et al 5…”

Validation of classical mixing rule coupled with a van der Waals–type equation of state for supercritical mixture system of oxygen and hydrogen using molecular simulation

“…However, since these are not practical in design and development of liquid rocket engine because of those enormous calculation cost, steady calculation using Reynolds averaged Navier-Stokes (RANS) has been mainly conducted (Shima, 2016). Currently, the turbulence models in RANS especially have a great effect on flow field both in the combustion (Ivancic et al, 2013, Chemnitz et al, 2016 and noncombustion state (Park, 2012), and the relative difference in results can be several tens of percent in some cases.…”

Numerical Investigation of Flow and Combustion in a Single-Element GCH4/GOX Rocket Combustor: Chemistry Modeling and Turbulence-Combustion Interaction

“…The different approaches are here compared and analyzed to understand how chemistry and TCI contribute to the differences between the numerical solutions and to the experiment. A comparison to experimental data can be found in Roth et al 1 The role of turbulence is studied in more detail in Chemnitz et al 2 First, the two chemical schemes are described and evaluated against a detailed one for canonical flame configurations. Then the different simulations are presented and compared in terms of global flame shape and flow structure.…”