Session: 01-12 Whole Engine Performance and Novel Concepts III

Paper Number: 102370

102370 - Hydrogen Combustor Integration Study for a Medium-Range Aircraft Engine Using the Dry-Low Nox "Micromix" Combustion Principle 

The feasibility study presents results of a hydrogen combustor integration for a Medium-Range aircraft engine using the Dry-Low-NO_X Micromix combustion principle. Based on a simplified Airbus A320-type flight mission, a thermodynamic performance model of a kerosene and a hydrogen-powered V2530-A5 engine is used to derive the thermodynamic combustor boundary conditions. A new combustor design using the Dry-Low NO_X  Micromix principle is investigated by slice model CFD simulations of a single Micromix injector for design and off-design operation of the engine. Combustion characteristics show typical Micromix flame shapes and good combustion efficiencies for all flight mission operating points. Nitric oxide emissions are significant below ICAO CAEP/8 limits. For comparison of the Emission Index (EI) for NO_X emissions between kerosene and hydrogen operation, an energy (kerosene) equivalent Emission Index is used.

A full 15° sector model CFD simulation of the combustion chamber with multiple Micromix injectors including inflow homogenization and dilution and cooling air flows investigates the combustor integration effects, resulting NO_X emission and radial temperature distributions at the combustor outlet. The results show that the integration of a Micromix hydrogen combustor in actual aircraft engines is feasible and offers, besides CO₂ free combustion, a significant reduction of NO_X emissions compared to kerosene operation. 

Presenting Author: Harald Funke Aachen University of Applied Sciences

Presenting Author Biography: Prof. Dr.-Ing. H. Funke is head of the Institute for “Gas Turbines and Aero Engines” at Aachen University of Applied Sciences (ACUAS) in Germany since 2004.
He studied mechanical Engineering at Technische Universität München (TUM) and did his PhD at RWTH Aachen University in 2002 in the field of effects of non-uniform inflows in gas turbines.
Prior to his engagement at ACUAS he was an employee of “MTU AeroEngines” as Project Manager “Certification Testing” of the GP7200 propulsion system components “Low pressure turbine” and “Turbine Center-frame”
His actual research topics include low nitric oxide hydrogen combustion in gas turbines as well as gas turbine control. In the field of piston aero engines the focus is on alternative fuels and certification of piston engine propulsion systems.

Authors:

Harald Funke Aachen University of Applied Sciences
Nils Beckmann Aachen Universty of Applied Sciences
Lukas Stefan Aachen University of Applied Sciences
Jan Keinz Aachen University of Applied Sciences