Institute for Reactive Flows (IRST)

Two recent papers by Ali Shamooni and Ruyue Cheng, dealing with the machine-learning based prediction of turbulent structures in the present of droplets or particles, were selected as Editor's pick in Physics of Fluids. The papers can be found HERE and HERE.

The Institute for Reactive Flows (IRST) participated in the "40th International Symposium - Emphasizing Energy Transition", which was located in Milan, Italy this year. Six PhD students and postdocs presented their research regarding turbulence-chemistry interaction, new fuels, soot modeling and nanoparticle agglomeration in a total of six presentations and four posters. [Conference website]

Decarbonization of our energy economy is one of our society’s most pressing issues today. The use of fuels like hydrogen and ammonia will be crucial for achieving these goals by significantly reducing green-house gas emissions, and it is therefore mandatory to develop models for cost-efficient and reliable simulations that aid the development process of suitable burner designs. [see more]

Hydrogen is quickly becoming one of the most important fuels for combustion applications. However, compared to conventional hydro-carbon flames, the high diffusivity of hydrogen makes lean hydrogen flames prone to form cellular instabilities. [see more]

A multiple mapping conditioning (MMC) approach is coupled with large eddy simulations (LES) for the prediction of the flame propagation, the flame structure and finite rate chemistry effects including NO formation in turbulent premixed flames. The mixing term in MMC relies on a reference field that characterizes the chemical composition within the flame and it is typically taken to be the reaction progress variable. [see more]

The Institute for Reactive Flows (IRST) participated in the 31. German Flame Day for Sustainable Combustion, which was held at the TU Berlin. Six PhD students and employees presented the institute’s research of nanoparticle synthesis, hydrogen flames and combustion modelling in six presentations and three posters. The top picture shows (left to right) Prof. Andreas Kronenburg, Thorsten Zirwes, Maximilian Karsch, Sergio Gutiérrez Sánchez, Weitao Liu, Nadezhda Iaroslavtceva and Tien Duc Luu. [Link to the conference]

Thorsten Zirwes, deputy director of the Institute for Reactive Flows (IRST), received the Jürgen-Warnatz-Award from the German Section of the Combustion Institute this September. The award is given biannually during the German Flame Day, which was held at the TU Berlin this year. The Jürgen-Warnatz-Award honors “outstanding young scientists in the field of combustion”. The picture shows Thorsten Zirwes together with Prof. Henning Bockhorn after the award ceremony on the Wannsee.

Authors: A. Shamooni, O.T. Stein, A. Kronenburg, A.M. Kemp, P. Debiagi, T. Li, A. Dreizler, B. Böhm, C. Hasse

Authors: M. Sontheimer, A. Kronenburg, O.T. Stein

Simulations of spray combustion in statistically homogeneous turbulence with different droplet loadings are performed using a sparse-Lagrangian particle method called MMC. We compare different models for the distribution of the droplet source terms to the notional particles with corresponding CP-DNS data and solutions of a dense particle method that employs standard models for the two-phase coupling. [see more]

Authors: S. Yao, B. Wang, A. Kronenburg and O. T. Stein

Authors: A. Shamooni, P. Debiagi, B. Wang, T. D. Luu, O. T. Stein, A. Kronenburg, G. Bagheri, A. Stagni, A. Frassoldati, T. Faravelli, A. M. Kempf, X. Wen and C. Hasse

Carrier-phase direct numerical simulation of detailed NOx formation in pulverized coal flames (PCC) with fuel-bound nitrogen is conducted in a 3D temporally evolving mixing layer setup where Lagrangian particles (Colombian bituminous coal) in an air stream (upper half of the domain) mix with the products of lean volatile/ air combustion in the lower stream. [see more]