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AVL TABKIN™ 2019 R1

TABKIN v2019.1 marks another step forward in maturity of the application of tabulated chemistry for engine and burner applications. The usability has been further improved by simplification of the workflow for Diesel and Gasoline engine applications. Also, TABKIN tables can now be visualized with a dedicated utility.




 

Take it easy!


Generation of a TABKIN chemistry look-up table is becoming easy as pie for Diesel and Gasoline engine applications. As illustrated in the figure below, a Comma-Separated Values (CSV) file format with typical engine parameters can be used as input for TABKIN. From these inputs, the embedded best-practices provide a robust set-up for TABKIN to generate the chemistry look-up table.
 


 

Inspect your flame!


When the TABKIN table is ready, it can be visualized with a new utility, the TABKIN Table GUI. It is used for visual inspection of the table data as well as manual look-up for selected coordinates, which make it a very powerful tool to complement the analysis of your CFD results. The image below is a snapshot of a TABKIN table, created with the new visualization utility, showing the peak heat release rate and fuel-rich, low temperature ignition reactions.
 

 

 

Burn it all!


With a new formulation for the transport equation of the progress variable, CFD simulations of Diesel engines now yield improved burn-out during the expansion phase. Of course without any compromise on the record-breaking speed of the tabulated chemistry solution. The image below illustrates the improved burn-out with of TABKIN 2019 R1 as compared to the previous release for a typical Diesel engine sector case, with the cumulated chemical heat release now approaching, as expected, the injected mass times Lower Heating Value (LHV).
 

 

 

Chemistry, a posteriori, please!


With TABKIN, the chemistry is calculated upfront or a priori. It allows to run a reactive CFD calculation with detailed chemistry at minimal CPU cost. AVL now introduces TABKIN-POST, an application that calculates the chemistry afterwards or a posteriori. It allows to run a non-reactive CFD simulation and calculate for example emissions afterwards. The first application of TABKIN-POST is premixed burner systems like domestic boilers, as illustrated in the image below, showing the hot gas flowing passed the water tubes in a domestic boiler, with streamlines colored by CO mass fraction, where the CO chemistry has been calculated after completing the CFD simulation.