Radiation

The focus of this work is the development of radiation models for use both in the study of the EAST shock tube experiments as well as simulation of the target application. A one-dimensional radiation model based upon the tangent slab approximation and a grey-gas model was developed.

While an existing radiation code has been used to fit absorption coefficients in the radiation model, work is under way to use experiments from the EAST shock tube facility to determine absorption coefficients directly from experiments. This calibration procedure will use the QUESO software.

Finally, a new formulation is under development called the full-spectrum k-distribution (FSK) method. Here, the spectrum is divided into k-cells where a cell local grey gas model is used.

• Develop one-dimensional radiation model based on the tangent slab approximation and grey-gas absorption model
• Work with coupling team to enable loose coupling scheme for hypersonic flow and shock-layer radiation
• Develop calibration procedure for determining model coefficients based on EAST shock tube experiments
• Development of the full-spectrum k-distribution (FSK) method for enhanced radiation modeling