Particle and emission reduction technology for efficient and environment-friendly propulsion systems
PERseuS
Distribution of liquid fuels combustion chamber
The distribution of liquid fuels (fossil and SAF) during injection into the combustion chamber has a major influence on the efficiency of combustion and the development of pollutants. The aim of this project is to carry out spray tests using a specially designed measuring section. These investigations are intended to provide a better understanding of the spray distribution and evaporation in the combustion chamber, as well as to generate data that provide the boundary conditions and validation variables for simulations.
Reduced NOx and soot emissions from fuels at the combustion chamber inlet
The PERseuS project aims to support the development of environment-friendly aircraft engines. The focus of the investigations is on reducing nitrogen oxide emissions and soot emissions. The objective in Perseus is determined by the new legal requirements for the emission of soot and nitrogen oxides (NOx). Effective blending concepts for liquid fuels in the combustion chamber are to be investigated.
A new holistic approach in the field of methods is to be developed. New fuel placement models are to be validated using advanced measurement technology on the spray test bench. For this purpose, DLR has a measuring section available in the form of the Optical High-Pressure Atomizer Test Facility OHZ, which allows unique optical measurements of the spray distribution to be carried out. For example, the spray is to be illuminated and the Mie scattering detected at high speed in order to document the fuel placement. This method will be used for the first time at high speed in this context. Furthermore, the droplet size and velocity are to be determined with the aid of PDA.
In order to resolve the possibly non-spherical droplets particularly close to the burner outlet, the tomographic shadowgraphy method is to be further developed in this project. It is expected that data can be generated with this method, which represents a major step for the validation of the modeling. In order to compare these results with the modeling, the air flow will be measured with PIV to ensure that the experiment matches the modeling. The fuel nozzle is being developed specifically for the project in close cooperation with CFD.
The test rig allows measurements to be taken under realistic temperature and pressure conditions from current aviation engines.
Running Time
2023-2026
Keywords
Reduction of CO2 and NOx, validation of CFD, spray, experimental investigation
Funded by the Federal Republic of Germany: Federal Ministry for Economic Affairs and Climate Action based on a resolution of the German Bundestag
