Education
Ph.D. in Mechanical Engineering, University of Missouri-Rolla, 1999 Thesis: Identification and Characterization of Complex Dynamic Structure in Spark Ignition Engines
M.S. in Mechanical Engineering, University of Missouri-Rolla, 1995 Thesis: Impact of Fuel Spray Behavior on Combustion Stability in Spark Ignition Engines
B.S. in Mechanical Engineering, University of Missouri-Rolla, 1993 Thesis: Cogeneration by Steam Injection to Gas Turbine Engines
Dr. Wagner is a Senior Research and Development Staff Member and has been on the staff at ORNL since 1999. He is principal investigator of several programs related to achieving high efficiency clean combustion (HECC) in light-duty and heavy-duty CI diesel engines. Wagner is also involved in numerous other projects ranging from the characterization and control of unstable combustion systems (e.g., lean SI, spark assisted HCCI) to advanced combustion sensors to post-combustion emissions controls.
- Adjunct Professor, Mechanical Engineering, University of Tennessee Knoxville.
- ORNL representative to multi-company, multi-laboratory Advanced Engine Combustion Working Group and HCCI University Working Group.
- ORNL representative to Diesel Emissions Reduction Consortium at the University of Wisconsin, Madison.
- Technical Reviewer for American Society of Mechanical Engineers, Combustion Science & Technology, Journal of Vibration & Control, International Journal of Engine Research, Society of Automotive Engineers, and IEEE Transactions on Control Systems Technology.
- Member of the Society of Automotive Engineers. Activities within SAE include session organizer and chairperson, Vice-Chairman of Fuels & Combustion Committee, member of Diesel Engine Committee, and liaison between Fuels & Lubricants and Powerplant activities for engine efficiency issues.
- Member of American Society of Mechanical Engineers (ASME), The Combustion Institute, Phi Kappa Phi (General Honor Society), Tau Beta Pi (Engineering Honor Society), Pi Tau Sigma (Mechanical Engineering Honor Society).
- ORNL Significant Event Award for “development and evaluation of adaptive control algorithms to improve combustion stability in lean burn spark ignition engines” (2004).
- UT-Battelle Awards Night, Outstanding Accomplishment in Science & Technology Award for Early Career Engineering Accomplishment (2003).
- ORNL Significant Event Award for “breakthrough research in diesel engine emissions control” (2002).
Selected Publications
Over fifty published conference papers and journal articles. A sample of recent publications is shown below and a comprehensive listing is available here.
C. Scott Sluder, R. M. Wagner, “An Estimate of Diesel High-Efficiency Clean Combustion Impacts on FTP-75 After-treatment Needs”, 2006 Powertrain & Fluid Systems Conference ( Toronto, Ontario Canada; October 2006)
C. S. Daw, R. M. Wagner, K. D. Edwards, and J. B. Green, “Understanding the transition between conventional spark-ignited combustion and HCCI in a gasoline engine”, 31st International Symposium on Combustion ( Heidelberg, Germany; August 2006)
M. D. Kass, M. M. Swartz, S. P. Huff, S. A Lewis, D. W. Lee, J. M. Storey, R. M. Wagner, "Lowering NOx and PM emissions in a light-duty diesel engine with biodiesel-water emulsions", ASAMBE Annual International Meeting (Portland, OR USA; July 2006).
K. D. Edwards, C. S. Daw, R. M. Wagner, and J. B. Green, "Cyclic Variability During the Transition Between Spark-ignited Combustion and HCCI", Technical Meeting of the Central State Section of the Combustion Institute ( Cleveland, OH USA; May 2006)
R. M. Wagner, K. D. Edwards, C. S. Daw, J. B. Green, and B. G. Bunting, “On the Nature of Cyclic Dispersion in Spark Assisted HCCI Combustion”, SAE 2006-01-0418 (Detroit, MI USA; April 2006).
C. S. Sluder, R. M. Wagner, S. A. Lewis, and J. M. E. Storey, “Fuel Property Effects on Emissions from High Efficiency Clean Combustion in a Diesel Engine”, SAE 2006-01-0080 (Detroit, MI USA; April 2006).
K. D. Edwards, R. M. Wagner, T. J. Theiss, and C. S. Daw, “An Approach for Investigating Adaptive Control Strategies to Improve Combustion Instability Under Dilute Operating Conditions”, Proceedings of ICEF05 Internal Combustion Engine Division of ASME 2005 Fall Technical Conference, ICEF2005-1283 (Ottawa, Canada; September 2005)
C. S. Sluder, R. M. Wagner, J. M. Storey, and S. A. Lewis, “Implications of Particulate and Precursor Compounds Formed During High-Efficiency Clean Combustion in a Diesel Engine”, SAE 2005-01-3844 ( San Antonio, TX USA; October 2005)
K. D. Edwards, R. M. Wagner, V. K. Chakravarthy, C. S. Daw, and J. B. Green, Jr., “A Hybrid 2-Zone/WAVE Engine Combustion Model for Simulating Combustion Instabilities During Dilute Operation”, SAE 2005-01-3801 (San Antonio, TX USA; October 2005)
R. M. Wagner, K. D. Edwards, C. S. Daw, J. B. Green, Jr., B. G. Bunting, “Enabling and Expanding HCCI in PFI Gasoline Engines with High EGR and Spark Assist”, 11th Diesel Engine Emissions Reduction Conference (Chicago, IL USA; August 2005)
K. Chakravarthy, R. Wagner, and S. Daw, “On the Use of Thermodynamic Modeling for Predicting Cycle-to-Cycle Variations in a SI Engine Under Lean Conditions”, SAE 2005-01-3802 ( San Antonio, TX USA; October 2005)
R. M. Wagner, C. Scott Sluder, S. A. Lewis, and J. M. Storey, “Combustion Mode Switching for Improved Emissions and Efficiency in a Diesel Engine”, Fourth Joint Meeting of the U.S. Sections of the Combustion Institute (Philadelphia, PA USA; March 2005)
B. C. Kaul, J. A. Drallmeier, K. Chakravarty, C. S. Daw, R. M. Wagner, and J. Sarangapani, “Modeling Nonlinear Dynamics in a Spark Ignition Engine with a Two-Zone Thermodynamic Model”, Fourth Joint Meeting of the U.S. Sections of the Combustion Institute ( Philadelphia, PA USA; March 2005)
C. S. Sluder, R. M. Wagner, S. A. Lewis, and J. M. Storey, “A Thermal Conductivity Approach for Measuring Hydrogen in Diesel Exhaust”, SAE Journal of Fuels and Lubricants, No. 2004-01-2908 (Tampa, FL USA; October 2004).
Selected Presentations
R. M. Wagner, K. D. Edwards, C. S. Daw, J. B. Green, “Understanding the Dynamic Instability of the SI-HCCI Transition and the Potential for Control”, SAE HCCI Symposium ( San Ramon, CA; September 2006). Invited.
R. M. Wagner, C. S. Sluder, “Evaluation of High Efficiency Clean Combustion (HECC) Strategies for Meeting Future Emissions Regulations in Light-Duty Diesel Engines”, Diesel Engine Emissions Reduction Conference 2006 ( Detroit, MI; August 2006).
R. M. Wagner, K. D. Edwards, C. S. Daw, J. B. Green, “Identification of Hybrid Combustion States for Improved Utilization of ‘Near-Flameless’ Combustion in Engines”, Poster presentation 31 st International Symposium on Combustion (Heidelberg, Germany; August 2006).
R. M. Wagner, C. S. Sluder, “Update on Light-Duty Diesel HECC Activities at ORNL”, 2006 AEC Working Group Meeting at USCAR (Southfield, MI; June 2006).
R. M. Wagner, K. D. Edwards, C. S. Daw, J. B. Green, “Hybrid SI-HCCI Combustion Modes for Low Emissions in Stationary Power Applications”, 3rd Annual ARES Meeting ( Argonne, IL; June 2006).
R. M. Wagner, C. S. Sluder, “High Efficiency Clean Combustion (HECC) in Light-Duty Multi-Cylinder Diesel Engines”, 2006 DOE National Laboratory ACE Merit Review & Peer Evaluation at Argonne National Laboratory ( Argonne, IL; May 2006).
R. M. Wagner, “Understanding the transition between conventional spark-ignited combustion and HCCI in a gasoline engine”, 2006 AEC Working Group Meeting at Sandia National Laboratories ( Livermore, CA; February 2006).
R. M. Wagner, “Diagnosing Combustion Instabilities Associated with HCCI Engine Operation”, Engineering the Automotive Future at the University of Alabama ( Tuscaloosa, AL; January 2006). Invited.
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