Embed Size (px)
Citation preview
Time Resolved FT-IR Analysis of Combustion of Ethanol, E85, and Gasoline in an Internal Combustion Engine
Allen R. White, Stephen SakaiDepartment of Mechanical EngineeringRose-Hulman Institute of Technology
Dr. Rebecca B. DeVasherDepartment of ChemistryRose-Hulman Institute of Technology
Advanced Combustion Laboratory
Why Look at Combustion with an FT-IR?• Combustion process is still largely unknown
• Examine progression of chemical species during combustion
• Possibility of increasing combustion efficiency and reducing harmful emissions
• Show engineering students the utility of spectroscopy and physical chemistry
Advanced Combustion Laboratory
Why Look at Combustion with an FT-IR?
Advanced Combustion Laboratory
Megatech Mk III Visible IC Engine
Advanced Combustion Laboratory
Visible Spark Ignition Four-Cycle Internal Combustion Engine
Fitted with Sapphire Combustion Chamber
Ethanol/E85/Gasoline Fueled
Experimental Setup
Advanced Combustion Laboratory
Bruker Vertex 70
Acoustic barrier
Combustionchamber
Initial Infrared Step-Scan Data
Advanced Combustion Laboratory
15 sample average16 cm-1 Resolution
Time Wavenumber
Amplitude
t=0 at ignition
Infrared Spectroscopy Interest for Automotive Purposes
Advanced Combustion Laboratory
1942 Packard
Ganske, Jane A. The Chemical Educator , Vol. 8 No.6 (2003)
Second Iteration of Sapphire Chamber
Advanced Combustion Laboratory
Advanced Combustion Laboratory
Comparison of Old and New Data
Combustion PathOptical Path
Top
Side
Top
Side
Old Chamber
New Chamber
Advanced Combustion Laboratory
Initial Data with New Engine Configuration
15 sample average16 cm-1 Resolution
Advanced Combustion Laboratory
Comparison of Old and New Data
15 sample average
Advanced Combustion Laboratory
Sample Data with New Engine Configuration
15 sample average16 cm-1 Resolution
Advanced Combustion Laboratory
Sample Data with New Engine Configuration
15 sample average16 cm-1 Resolution
Advanced Combustion Laboratory
New Engine Data with significant averaging (390 samples)
16 cm-1 Resolution
Advanced Combustion Laboratory
E85 New Engine Data with Averaging (30 samples)
Advanced Combustion Laboratory
Gasoline New Engine Data with Averaging (15 samples)
Advanced Combustion Laboratory
Gasoline: Cylinder Deposits! (E85 similar)
Advanced Combustion Laboratory
Comparison of CO2 peaks:
Time
Ampl
itude
2242 cm-1
Conclusions
Advanced Combustion Laboratory
Low signal to noise ratio due to:• Combustion variability
• Combustion mixture variation
• Step-scan mirror location error due to vibrations from combustion
• Line-of-sight averaging
Future Work
Advanced Combustion Laboratory
SPIE Fall 2010:
Future Work
Advanced Combustion Laboratory
Acknowledgements
Stephen Sakai
Rose-Hulman Institute of TechnologyLilly Foundation Faculty Success Grant
Rose-Hulman Institute of TechnologyDean’s Equipment Investment Fund
Advanced Combustion Laboratory
Advanced Combustion Laboratory
Areas of Interest
Advanced Combustion Laboratory
Gasoline Combustion Spectra from 1942 Packard
Areas of Interest
Advanced Combustion Laboratory
High Resolution Scan of Ethanol – 200 Scans @ 1 cm-1 Resolution
Advanced Combustion Laboratory
t = 0
t = 5ms
Progression of Chemical Species
Advanced Combustion Laboratory
t = 10ms
t = 15ms
Progression of Chemical Species
Advanced Combustion Laboratory
t = 20ms
t = 25ms
Progression of Chemical Species
