Patents

Recursive sequential Combustion: the MOeBIUS technology

CBOne proudly presents the MOeBIUS technology, which exploits the innovative principle of sequential recursive combustion.

Sequential recursive combustion means that the burners are put right behind each other, and arranged in a closed-loop, infinitely repeating a sequential combustion process. By breathing in a significant part of the burnt gases of its predecessor, each burner gets at the same time a combination of effective fresh gases pre-heat, and of reburning, which are positive to sustain robust lean combustion, with a NOx performance augmented by the reburning effect. The key lies in the simplicity of the combustor design.

MOeBIUS stands for MOmentum-enhanced Blend with recIrculated bUrnt gases.

Combined Optic-Acoustic Monitoring of Combustion in a Gas Turbine (Journal Publication)

A compact, high temperature- and pressure-resistant probe was developed with success in the frame of the FFG / Take Off / emo(o)tion projects. This probe combines acoustic and optical sensors for a better description of the gas turbine combustion, in-situ.

The results of the probe are published in the International Journal of Turbomachinery for Propulsion and Power. The article is open access. The reference is:

Giuliani, F.; Andracher, L.; Moosbrugger, V.; Paulitsch, N.; Hofer, A.
Combined Optic-Acoustic Monitoring of Combustion in a Gas Turbine.
Int. J. Turbomach. Propuls. Power 2020, 5, 15.

Open access: https://doi.org/10.3390/ijtpp5030015

Effective Solutions Against Particle Matter in Aviation

The new standard on particle matter called nvPM from the ICAO enters into force on the first of January 2020. From now on, a drastic reduction in particle matter (or soot) is required to get certification for the new aircraft engines.

CBOne and FH Joanneum / Aviation work together on the advanced combustion monitoring for aircraft engines including alert on soot formation in the frame of the "emootion" project

The ICAO is the International Civil Aviation Organization, a specialized agency of the United Nations in charge of setting the principles and techniques of international air navigation and of planning and developing international air transport to ensure safe and orderly growth. The acronym nvPM stands for non-volatile particulate matter emissions. It adds-up to prior standards defined for CO2 and NOx reduction in aviation.

CBOne participates in this effort to further push the limits of what is technically possible towards the soot-free burner. Read about our activities in burner design and advanced controls to improve the mixedness of the reactants, as well as our advanced monitoring techniques designed to detect soot production - so that it is then corrected within a comfortable safety margin.

Forcing Pulsations by Means of a Siren for Gas Turbine Applications (Journal Publication 2020)

An article summarizing 20 years of experience about CBOne's pulsation Technology and focusing on the very latest developments has been published in the International Journal of Turbomachinery for Propulsion and Power. To this point, we wish to thank the Board of the EVI-GTI Conference for their recommendation for journal publication.

CBOne developed a special actuator, able to generate with precision airflow modulations over the 0-6000 Hz range, with amplitudes achieving up to 150 dB SPL. The article describes into details:

The siren technology
The generation of a precision airflow modulation, for dynamic sensor calibration purpose
The drive of flow dynamics, for laboratory applications
The drive of thermoacoustics, for gas turbine applications

Forcing Pulsations by Means of a Siren for Gas Turbine Applications
by Fabrice Giuliani, Markus Stütz, Nina Paulitsch, and Lukas Andracher.
Int. J. Turbomach. Propuls. Power 2020, 5(2), 9; https://doi.org/10.3390/ijtpp5020009

Link to the online open-access full-text