Modeling and simulation of droplet evaporation in different gas environments under supercritical conditions
The global objective of this subproject of the Transregio is to develop models and methods for the description of droplets and collectives of drops in external gas environments under transcritical and supercritical conditions. Therefore it is necessary to use thermodynamically consistent modeling methods to describe evaporating droplets. One uses adjusted parts of models of the gas flow and the drop-evaporation with an Euler-Euler or Euler-Lagrange method.
Investigations in the first period will focus on single drops, which are described by direct numerical simulations, in coordination with other subprojects. Emphasis is put on the development of a multiple regime model at undercritical, transcritical and supercritical conditions that allows correct predictions of the droplet evaporation behavior. The gas-phase and droplet model is validated using existing data from the literature and in addition with help of detailed experimental data from the TP-B2.
The resulting multiple regime evaporation model will be applied in future periods in the frame of LES sprays calculations. At first the proposed models and methods are developed by using the CFD code OpenFOAM. Subsequently they are validated and later integrated into the code of the in-house code FS3D.
Ries, F., Obando, P., Shevchuk, I., Janicka, J., Sadiki, A.:
Numerical analysis of turbulent flow dynamics and heat transport in a round jet at supercritical conditions,
Int. J. Heat Fluid Flow, 2017 (under review)
Sacomano, F., Chrigui, M., Sadiki, A.:
Comparison of different LES-based combustion models applied to a reacting n-heptane spray.
Int. Symp. Turbul. Shear flow Phenom., Melbourne, Australia, (2015).
Chrigui, M., Sacomano, F., Sadiki, A., Masri, A.R.:
Evaporation Modeling of Poly-disperse Spray in Turbulent Flow.
B. Merci, E. Gutheil (eds) Experiments and Numerical Simulation of Turbulent Combustion of Diluted Sprays. ERCOFTAC Series 19: 55-77, 2014.
Sacomano, F., Chrigui, M., Sadiki, A., Janicka, J.:
LES-Based Numerical Analysis of Droplet Vaporization Process in Lean Partially Premixed Turbulent Spray Flames.
Combust. Sci. Technol. 186(4-5): 435-452, 2014.
Chrigui, M., Masri, A.R., Sadiki, A.,·Janicka, J.
Large Eddy Simulation of a Polydisperse Ethanol Spray Flame
Flow Turbulence Combust (2013), Springer, 20 Seiten
Shevchuk, I., Sadiki, A., Janicka, J.:
Numerical investigation of high pressure evaporation of a resting acetone droplet in nitrogen environment.
Proc. 25th European Conference on Liquid Atomization and Spray Systems, Chania, Greece (2013).
Chrigui, M., Gounder, J., Sadiki, A., Masri, A., Janicka, J.
Partially premixed reacting acetone spray using LES and FGM tabulated chemistry
Combustion and Flame 159 (2012), 2718-2741
Schneider, L., Le Lostec, N.; Villedieu, P.; Sadiki, A.
A moment method for splashing and evaporation processes of polydisperse sprays
Int. J. of Multiphase Flow 36 (2011), 261-272
Sadiki, A., Ahmadi, W., Chrigui, M., Janicka, J.
Towards the Impact of Fuel Evaporation-Combustion Interaction on Spray Combustion in Gas Turbine Combustion Chambers. Part II: Influence of High Combustion Temperature on Spray Droplet Evaporation
Proc. Of the 1st Int. Workshop on Turbulent Spray Combustion (eds. B. Merci, D. Roeckaerts, A. Sadiki), Chap. 3, (2011), 111-132, Springer
Chrigui, M., Roisman, I., Batarseh, F., Sadiki, A., Tropea, C.
Spray generated by an air blast atomizer under elevated ambient pressures
Journal of Propulsion and Power 26 (2010), 1170-1183