IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
High Temperature Air Combustion
with Liquid Fuels
Loay Saeed
Ari Kankkunen
Carl-Johan Fogelholm
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
Objectives of the reserach:
• Develop a new test equipments for liquid fuel droplets combustion using
Laser-Induced Fluorescence (LIF)/Laser-Induced Incandescence (LII)
methods.
• Measure the concentration of OH and soot which burn around the
particle.
• Getting more understaning for the Cenosphere formation process.
Project co-operation
Teknillinen korkeakoulu and Tampere University of Technology
IV Liekkipäivä
23.1.2008 Tampere
HELSINKI UNIVERSITY OF TECHNOLOGY
TTY Test reactor
•
Uniform droplets of size 100 –200 µm.
•
Temperature 800 –1000 °C.
•
Gas composition can be changed.
•
Possibility to use optical
measurement techniques (e.g. LIF and
PDA).
•
Cenosphere formation and
oxidation are done separately. (No
collect-and-reburn).
•
FTIR measurements of pyrolysis and
combustion gases.
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
HTAC Advantages
•
Lower NOx by avoiding very high peak-temperatures
•
CO2 reduction
– Fuel consumption decreases →CO2 emissions decreases.
•
Energy saving
– Thermal energy from exhaust gases used to heat up combustion air.
– Higher heat flux from flames.
•
Equipment size reduction
– Uniform heat flux distribution and thermal field uniformity
– Volume of the combustion chamber is fully used
•
Lower
– noise levels (no flame front)
– thermal stress to structures
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
High Temperature Air Combustion
Conventional flame
and no air preheat
From “ What is Flameless Combustion?”
Ambrogio Milani and Joachim Wünning
From IFRF Online Combustion Handbook
Flameless combustion
and air preheat
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
High Temperature Air Combustion
Conventional flame
and no air preheat
From “ What is Flameless Combustion?”
Ambrogio Milani and Joachim Wünning
From IFRF Online Combustion Handbook
Flameless combustion
and air preheat
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
Temperature and OH concentration from
laser diagnostic techniques
From “ What is Flameless Combustion?”
Ambrogio Milani and Joachim Wünning
From IFRF Online Combustion Handbook
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
LIF-device on TKK , which will be used in the optical
combustion investigation
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
Measurements available
• Visualization, CCD and ICCD cameras
• Flow field, Particle Image Velocimetry (PIV)
• Soot concentration, Laser Induced Incandescence (LII)
• OH, NO, CH concentration, Laser Induced
Fluorescence (LIF)
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
Current situation
• The development of the new test equipment and the LIF
device set-up is ongoing
• The maintenance for LIF device was completed. New filters
for the Nd:YAG laser and methanol, dye (Coumarin 153),
and filters for the dye laser was ordered
• One student joined the research team. He is doing his thesis
on LIF measurement.
• Testing to be resumed within the next few weeks
IV Liekkipäivä
HELSINKI UNIVERSITY OF TECHNOLOGY
23.1.2008 Tampere
Current and future tasks
• Measurement of OH concentration in Bunzen burner
flame
• Practicing the measurement through a window
• Get a calibration measurements for the device
• Finally, developing a hot drop oven of OH- and soot
concentration measurements with TTY