Basic Research

 

The named scientific works are funded by the following establishments:

Deutsche Forschungsgemeinschaft (DFG)
Wissenschaftsrat (WR)

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Selected scientific work:

 
  Logo FSC
Title Fuel Science Center
Homepage FSC
Funding Deutsche Forschungsgemeinschaft (DFG), Wissenschaftsrat (WR)
Projectnumber EXC 2186
Description The increasing availability of non-fossil energy technologies opens unprecedented possibilities to re-design the interface of energy and material value chains towards a sustainable future. The fundamental research in the Cluster of Excellence “The Fuel Science Center – Adaptive Conversion Systems for Renewable Energy and Carbon Sources” (FSC) aims to integrate renewable electricity with the joint utilization of bio-based carbon feedstocks and CO2 to provide high-density liquid energy carriers (bio-hybrid fuels), which enable innovative engine concepts for highly efficient and clean combustion. FSC will generate fundamental knowledge as well as novel scientific methodologies to replace today’s fossil fuel-based static scenario by adaptive production and propulsion systems that are based on renewable energy and carbon resources under dynamic system boundaries.
Period 01/2019 – 12/2025

 
 

  Logo FOR 2687
Title

Cyclic variations in highly optimized spark-ignition engines: experiment and
simulation of a multiscale causal chain

Acronym FOR 2687
Funding Deutsche Forschungsgemeinschaft (DFG)
Projectnumber FOR 2687
Description

The main aim of this research group is the systematic analysis of cyclic variations as the basis for further optimization of modern si combustion methods. Currently, the operational range of highly optimized si engines is limited by abnormal combustion phenomena such as misfiring, incomplete combustion or engine knock, which are all significantly influenced by cyclic variations. Existing strategies to minimize these phenomena always reduce the thermal efficiency and thus increase CO2-emissions. To further optimize future si engines it is therefore necessary to expand the operational range with a detailed understanding of the chain of effects regarding cyclic variations and enabling stable and efficient operation close to the stability limit. Causes and effects of cyclic variations are currently neither completely understood nor predictable.

Using novel, experimental procedures in combination with innovative model developments and simulation procedures, a detailed understanding of the mechanisms of action is achieved through forward and backward analysis of the multiscale chain of effects and predictive simulation methods are developed.

Period 01/09/2019 - 31/08/2022

 
 

 
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Title

Optimization-Based Multiscale Control of Low-Temperature Combustion Engines

Homepage Research Unit 2401
Funding

Deutsche Forschungsgemeinschaft (DFG)

Projectnumber FOR 2401
Description

The ecological and economic energy supply poses a central challenge for society. For realization of high efficiency with simultaneously low pollutant emissions, the FOR2401 investigates the promising low temperature combustion. For successful realization of the multiscale control concepts, fundamental research questions from the disciplines of chemistry, combustion science, engine technology, numerical methods, and control technology have to be addressed.

Based on this knowledge, tailored control methods shall be developed which rely on real-time optimization and allow for control on time scales that are smaller than the ones achievable with state-of-the-art concepts. The research is conducted in close collaboration between scientist of pure and applied science disciplines from the University of Bielefeld, University of Freiburg and RWTH Aachen University.

Period since 2016

 
 

 
  Logo
Title Integrated Energy Supply Modules for Roadbound E-Mobility
Homepage mobilEM
Funding Deutsche Forschungsgemeinschaft (DFG)
Projectnumber GRK 1856
Description

This demanding topic is addressed by a new post graduate program "Integrated Energy Supply Modules for Roadbound E-Mobility" (mobilEM) at RWTH Aachen University and has started on October 1st, 2013. The program is funded by Deutsche Forschungsgemeinschaft (DFG) and explores the physical foundations of electro-chemical energy storage and its combination with novel fuel-operated range extender units. Fuel-operated range extenders allow a reasonable dimensioning of the electrical energy storage system size and its thermal conditioning. Additionally, an efficient air conditioning of the passenger compartment can be achieved.

Period 10/2013 - 09/2022

 
 

 
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Title

Tailor Made Fuels from Biomass

Homepage TMFB
Funding

German Research Fundation (DFG), Science Council (WG)

Projectnumber Cluster of Excellence 236 (EXC 236)
Description

The research cluster “Tailor-Made Fuels from Biomass” (TMFB) analyzes novel biofuels from the original biomass to its use in a gasoline or diesel engine. The cluster approaches the production of biofuels via a selective (bio-) chemical synthesis based on lignin, under the constraint of preserving the environment and reducing the emissions of the engine. Developing biofuels incorporates various fields of research such as biological-, chemical-, and mechanical engineering. Therefore, several institutes of the RWTH Aachen University participate in the TMFB-research cluster.

Within this framework, the Institute of Heat and Mass Transfer experimentally analyzes the spray break-up and mixture formation of the various fuel candidates under engine-like conditions. For simulating in-cylinder conditions, specialized high-pressure chambers are used. Their windows allow the application of different optical measurement techniques such as Phase-Doppler-Anemometry, Particle-Image-Velocimetry, Laser-Induced-Fluorescence, Laser-Correlated-Velocimetry, High-Speed-Visualizations or Ballistic-Imaging.

Period

01/2008 - 12/2012 (1st phase), 01/2013 - 10/2017 (2nd phase),11/2017 - 12/2018 (Bridge phase)

 
 

 
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Title

Model-based Control of Homogenised Low-Temperature Combustion

Homepage SFB 686
Funding Deutsche Forschungsgemeinschaft (DFG)
Projectnumber SFB 686
Description

The distribution of energy plays an important part in the domestic sector, for process heat and for the transportation of people and goods.

Especially in transportation, the use of fluid hydrocarbons seems indispensable, due to their high energy density. The decrease of emissions is therefore an important research objective in these fields.

A turning away from mixture-controlled high-temperature combustion and a turning towards a homogenized combustion with averagely low temperatures leads to an occurrence of instabilities in combustion and the aim of controlling them.

The application of such a control is to be carried out on the basis of findings made for a respective area of application and the physical models developed for them; thus, it will be a model-based control. The development of such model-based controls is the SFB's medium-term aim.

Period 07/2006 - 06/2014

 
 

 
  Logo
Title Special research field SRF 224 "Motor Combustion"
Homepage Sonderforschungsbereich 224
Funding Deutsche Forschungsgemeinschaft (DFG)
Projectnumber SFB 224
Description

The partly controversial demand in engine development for better driving-abilities at low fuel consumption while complying with very low emission limits requires a research of fundamental correlations of the motor combustion process. The interactions of chemical reactions with impulse, heat, and mass transfer in the transient flow are very important. The joint research of energy transmission in combustion engines is done with the aim to expand the basic knowledge in the field of motor combustion and thereby improve the combustion process.

Period 1984 - 1995