Dissipation Elements at the Flame Surface in Methane Diffusion Flame (B. Hentschel and D. Denker)

Flame in Slotburner (S. Kruse)

Particle Charged Flow (E. Varea)

DNS of a scaled-up Diesel injector

Dissipation Element Analysis of Methane Diffusion Flame (D. Denker)

DNS of a scaled-up Diesel injector (M. Bode)

Quartz nozzle sampling in a methane counterflow flame (M. Baroncelli)

Oxyfuel coal combustion in a hot gas stream (D. Felsmann)


In recent years there has been an increasing awareness of the environmental effects, which has lead to stringent emission regulations on automotive engines. It has become a challenge for engine designers, to fulfil the restriction on the level of emissions. The nature of the combustion process is determined by the quality of the fuel spray, its distribution and mixing within the combustion chamber. The processes such as atomization, droplets distribution, and ignition have direct influence on the combustion performance and emission characteristics.

Through-flow, high pressure, and temperature combustion chamber

In order to study fuel spray characteristics and combustion details, a constant volume, constant flow rate, high pressure and temperature chamber is used. It is built at the Institute for Combustion Technology (ITV) at RWTH Aachen University. Non combustion spray characteristics such as penetration length and cone angle in both liquid and vapor phases, are determined by conducting Back-light Illumination Technique (DBI), Miescattering, and Shadowgraphy techniques. Combustion studies such as flame lift-off, ignition delay, and soot volume fraction (fv) are determined by OH chemiluminescence (OH*) and Saturated Planar Laser Induced Incandescence (SPLII) combined with Laser Extinction (LE) techniques, respectively.

Flame movement in time series
Quantitative soot volume fraction

Both solenoid and piezo injectors are applied in the test-bench. The solenoid injector is controlled by a Smart ESG2 power unit laboratory controller and Labview programming is used for injection duration and timing control. The piezo injector is controlled by VEMAC controller. These instrumentations also enable variable and multiple injection timing strategies.

Single component fuels, mixtures, and biofuels are investigated under engine like conditions in a high pressure and high temperature chamber for a better understanding of the spray atomization and mixing process based on the fuel physical properties. Furthermore, nozzle geometry and injector types are also examined for the spray atomization tendency.


Maung Maung Aye