Numerical results for hydrogen flames stabilized by bluff bodies: influence of star-shaped geometries on flame characteristics

Research data related to the publication "Numerical analysis of turbulent nitrogen-diluted hydrogen flames stabilised by star-shaped bluff bodies".This dataset contains numerical simulation results of turbulent hydrogen-air flames stabilized by various bluff body geometries. The fuel is nitrogen-diluted hydrogen, and the oxidizer is air. The study investigates how different bluff body shapes—namely cylindrical, star-shaped, and shapes with sharp or smooth, wavy, small triangular elements—affect vortex formation, mixing, and flame characteristics.Simulations were performed using the Large Eddy Simulation (LES) method to analyze flame length, temperature and species field, and completeness of the combustion process. The results highlight how even small geometric changes to the bluff body can significantly influence combustion performance.The simulation results are provided in files named Fig*.dat, where each file corresponds to a figure from the associated publication. The readme.txt file includes a sorted list of filenames linked to the respective figures. For more information about the .dat file format, please refer to the Tecplot documentation:https://www.tecplot.com/2016/09/16/tecplot-data-file-types-dat-plt-szplt/This work was supported by the National Science Center in Poland (Grant No. 2020/39/B/ST8/02802). The computations were carried out using the PL-Grid Infrastructure and the Poznan Supercomputing and Network Center.