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Heat Transfer and Reactive Flows

Introduction

Flows undergoing reactions and heat-transfer are encountered in most industrial applications and in environmental phenomena. Reacting flows are therefore at the heart of several Sustainable Development Goals (SDG). Our work focuses on clean combustion, gas cleaning and clean air applications, and energy efficient units and vehicles - hence addressing goals #3, 7, 11, and 12. In order to address these challenges, we collaborate with other researchers in Sweden and worldwide. In particular, we are involved in national multi-disciplinary consortia and networks, for example the Clean Air Network C3AIr.

Research overview

The research is conducted by researchers at the Department at Mechanics at KTH and can be categorized in the following categories:

Heat-Transfer for energy efficient systems:

We use high-fidelity simulations to investigate heat-transfer mechanisms in turbulent flows. We often focus on complex geometry and rotating flows and industry relevant geometries. Our aim is to identify the driving mechanisms and act on them to improve the heat-transfer for securing optimal and energy efficient operation.
Example of projects in this category are:

  • New generation Cool Electric Engines
  • Low Drag engine cooling for future vehicles
  • Heat transfer in rotating turbulent flows

Clean Combustion:

We aim to understand the combustion process, in particular the formation of pollutants and noise in flames. We use high-fidelity simulations, including relatively detailed chemical oxidation schemes to capture the interplay between turbulent structures and the flame surface. We develop also methods to analyse combustion simulation data and identify automatically the successive steps during oxidation in turbulent flows.
Example of projects in this category are:

  • Silent and clean aero-engines
  • Flameless combustion
  • Analysis of large scale combustion simulation data with machine learning

Flue Gas Cleaning & Clean Air:

This topic focuses on understanding the evolution of pollutants in flue gases with aim to clean the gas. In particular, we investigate avenues for removing NOx and SOx pollutants by oxidation by ozone and formation of ammonium salt particles.
Example of projects in this category are:

  • Investigation of nucleation and particle formation in turbulent flue gas
  • Investigation of oxidation by ozone

Research environment

Our expertise includes numerical methods, experiments, modelling and simulations. We aim at identifying thermodynamic and thermo-chemical changes in turbulent flows and use the knowledge to contribute meeting Sustainable Development Goals.

Research groups

Facilities

  • Simulation codes for Large Eddy Simulation and Direct Numerical Simulation as well as large scale automated data-analysis algorithm
  • FLOW centre has access to the different super-computer resources managed by the Swedish Centre for Infrastructures ( SNIC).

Collaborating organisations

Industry: ABB, Volvo Cars, Volvo GTT, PhoenixBioPower, LifeAir
National: KTH CGCEx , KTH Chemical Engineering, KTH Civil and Architectural Engineering, KTH Metallurgy, KTH Visualization Lab., KTH Electrical Engineering, Stockholm University ACES, Chalmers, IVL Swedish Environmental INstitute
International: University of Cincinnati, TU Berlin, University Carlos III, Université Libre de Bruxelles, Stanford University

Key publications

Fooladgar E., Duwig C., 2018, “A new post-processing technique for analyzing high-dimensional combustion data, Combustion and Flame”, 191, pp. 226-238

Cifuentes L., Fooladgar E., Duwig C., 2018, “Chemical Explosive Mode Analysis for a Jet-in-Hot-Coflow Burner operating in MILD combustion”, Fuel, 232, pp. 712-723

Lupo G., Duwig C., 2018, “A numerical study of ethanol/water droplet evaporation”, Journal of engineering for gas turbines and power, 140(2), 021401.

Fiorina B., Mercier R., G. Kuenne, A. Ketelheun, A. Avdić, J. Janicka, D. Geyer, A. Dreizler, E. Alenius, C. Duwig, P. Trisjono, K. Kleinheinz, S. Kang, H. Pitsch, F. Proch, F., Cavallo Marincola, A. Kempf; 2015 “Challenging modeling strategies for LES of non-adiabatic turbulent stratified combustion”, Combustion and Flame, 162(11), 4264-4282.

Brethouwer, G. (2018) Passive scalar transport in rotating turbulent channel flow. J. Fluid Mech. 844, 297-322.

Li, Q., Schlatter, P., Brandt, L., & Henningson, D. S. (2009). DNS of a spatially developing turbulent boundary layer with passive scalar transport. International Journal of Heat and Fluid Flow, 30(5), 916-929.

Pouransari, Z., Vervisch, L., Fuchs, L., Johansson, A.V. (2016) DNS analysis of wall heat transfer and combustion regimes in a turbulent non-premixed wall-jet flame. Flow Turb. Combust. 97, 951-969.

Innehållsansvarig:Ardeshir Hanifi
Tillhör: FLOW
Senast ändrad: 2018-09-04