#	Pagina
attuale pagina	/open-h2020/projects/213940/results.html

Report

Teaser, summary, work performed and final results

Periodic Reporting for period 1 - CIDAR (Combustion species Imaging Diagnostics for Aero-engine Research)

Teaser

Summary

The objective of CIDAR project is the development and demonstration of TRL6 standardised measurement systems capable of imaging large engine exhaust CO2 and non-volatile particulate matter (nvPM) emissions of future very high bypass ratio (VHBR) engines.
In particular, CIDAR offers a very innovative VHBR engine diagnostic approach based on photonic technologies with the aim to increase the EU competitiveness in non-intrusive engine exhaust measurement systems. Such technological progress is essential for the delivery of robust engine performance prediction and lean burn combustion operation on future VHBR engines. CIDAR will bring to TRL6 photonic enabled imaging measurement of aeroengine exhaust species. CIDAR will provide solutions for limitations identified in terms of image quantification and incorporate features such as self-diagnostics and control aspects capable of integration with test cell systems.

Work performed

Multi-beam optical hardware for CO2 measurement has been developed and installed including a Tuneable Diode Laser Absorption Spectroscopy (TDLAS) source at TRL6, a commercially available Thulium Doped Fibre Amplifier (TDFA) and a fibre network. A prototype of data acquisition and processing â€œhubâ€ unit has been developed, which will integrate firmware development. Software has also been developed including CO2 concentration measurement algorithms, tomographic image reconstruction and image analysis.
A fully calibration-free CO2 measurement system (hardware and software) has been developed, that requires the measurement of key laser parameters on-site and key data calibration from the hubs for this calibration process.
The CO2 measurement system has been demonstrated to be capable of recovering images of CO2 concentration in the exhaust of a Trent aero-engine at frame rates of 1.25 Hz and for all thrust levels.
nvPM measurement system hardware has been developed and installed including a laser excitation source, a Laser-Induced Incandescence (LII) detection camera, and supplementary timing, recording, and measurement hardware. Software for image processing and analysis has also been developed.
A calibration rig has been developed to relate image intensity to nvPM concentration. LII signal generation and beam propagation data has been used to inform experimental / test results.
The nvPM measurement system has been demonstrated to be capable of detecting LII in the time-integrated regime within the confines of the test cell at a spatial resolution of 10 cm. The Signal-to-Noise ratio is sufficient for analysis and study of LII.
A test plan has been prepared to validate the CO2 and nvPM/soot measurement systems on real engine testing and evaluate the performance stability of the systems over time and environment.

Final results

Planned tests will be performed targeting to provide validation of the CO2 and nvPM/soot measurement systems whilst creating datasets, which may be used to establish measurement and imaging uncertainty as necessary for a successful reliable commercial product.
For the CO2 measurement system, further improvements to signal-to-noise ratio (SNR) will be obtained once the final TRL 6 hub units developed in this project replace the commercial PXI chassis system. The calibration system will be installed and validated. A control system will also be implemented including diagnostic routines to assess performance and automatically identify faults.
With the nvPM/soot system improvements defined based on engine test results, the next iteration of the system will have a better experimental output along with the capability of the system to characterise the turbulence of the engine under test.
To the best of our knowledge there is no alternative technology to quantify the concentration of chemical species like CO2 apart from this developed in this project. The impact of the project on aeroengines and emission measurements remains relevant and unchanged.