Photo of Stefan Thynell

Stefan Thynell

Professor

Department(s):

  • Mechanical Engineering

114 Research Building East

umt@psu.edu

814-863-0977

Research Areas:

Energy Systems, Thermal/Fluid Sciences

Interest Areas:

Radiation, heat transfer, combustion, thermal decomposition and formulation of reaction mechanisms of energetic materials, FT-IR and time-of-flight mass spectroscopy.

 
 

 

Education

  • BS, Mechanical Engineering, West Virginia University, 1980
  • MS, Mechanical Engineering, North Carolina State University, 1983
  • Ph D, Mechanical Engineering, North Carolina State University, 1986

Publications

Book, Chapter

  • S. Q. Wang and Stefan Thynell, 2012, Decomposition and combustion of ionic liquid compound synthesized from tetramethylethylenediamine and nitric acid, pp. 51-66

Part of Book

  • M. K. Das and Stefan Thynell, 2010, Corona, spark, and electrothermal-chemical plasma ignition systems, Wiley-VCH, pp. 53-69
  • Stefan Thynell, 2002, ASME Proceedings of the Thermophysics and Heat Transfer Conference: CD-ROM
  • Stefan Thynell, 2002, Proceedings of the International Mechanical Engineering Congress and Esposition: CD-ROM
  • Stefan Thynell, 2002, Review Chapter, WIT Press

Journal Article

  • Mayank Khichar, Lalit Patidar and Stefan Thynell, 2018, "Improvement and validation of a detailed reaction mechanism for thermal decomposition of RDX in liquid phase", Combustion and Flame, 198, pp. 455-465.
  • Lalit Patidar, Mayank Khichar and Stefan Thynell, 2018, "Intermolecular potential parameters for transport property modeling of energetic organic molecules", Combustion and Flame, 200, pp. 232-241.
  • Kaiqiang Zhang and Stefan Thynell, 2018, "Thermal Decomposition Mechanism of Aqueous Hydroxylammonium Nitrate (HAN): Molecular Simulation and Kinetic Modeling", Journal of Physical Chemistry A, 122, pp. 8086-8100.
  • Tanusree Chatterjee and Stefan Thynell, 2018, "Quantum Mechanics Investigation on Initial Decomposition of Ammonia Borane in Glyme", International Journal of Chemical Kinetics, 50, pp. 568-581.
  • Lalit Patidar, Mayank Khichar and Stefan Thynell, 2018, "Identification of Initial Decomposition Reactions in Liquid-Phase HMX using Quantum Mechanics Calculations", Combustion and Flame, 188, pp. 170-179.
  • Kaiqiang Zhang and Stefan Thynell, 2017, "Examination of the Mechanism of the Yield of N2O from Nitroxyl (HNO) in the Solution Phase by Theoretical Calculations", Journal of Physical Chemistry A, 121, (23), pp. 4505-4516.
  • Lalit Patidar and Stefan Thynell, 2017, "Quantum Mechanics Investigation of Initial Reaction Pathways and Early Ring-Opening Reactions in Thermal Decomposition of Liquid-Phase RDX", Combustion and Flame, 178, pp. 7-20.
  • A. Hollinger and Stefan Thynell, 2017, "Thermal Contact Resistance Measurements of Compressed PEFC Gas Diffusion Media", ASME Journal of Electrochemical Energy Conversion and Storage, 13, (4), pp. 041004
  • S. Wang and Stefan Thynell, 2016, "Combustion and Decomposition of Monomethylhydrazinium Nitrate", Journal of Energetic Materials, 35, (2), pp. 148-156.
  • N. Kumbhakarna and Stefan Thynell, 2014, "Development of a reaction mechanism for liquid-phase decomposition of guanidinium 5-amino tetrazolate", Thermochimica Acta, 582, pp. 25-34
  • N. R. Kumbhakarna, K. J. Shah, A. Chowdhury and Stefan Thynell, 2014, "Identification of liquid-phase decomposition species and reactions for guanidinium azotetrazolate", Thermochimica Acta, 590, pp. 51-65.
  • W.-G. Liu, S. Wang, S. Dasgupta, Stefan Thynell, W. A. Goddard III, S. Zybin and R. A. Yetter, 2013, "Experimental and quantum mechanics investigations of early reactions of monomethylhydrazine with mixtures of NO2 and N2O4", Combustion and Flame, 160, (5), pp. 970-981
  • M. R. Weismiller, S. Q. Wang, A. Chowdhury, Stefan Thynell and R. A. Yetter, 2013, "Confined rapid thermolysis studies of ammonia borane", Thermochimica Acta, 551, pp. 110-117
  • S. Q. Wang and Stefan Thynell, 2012, "An experimental study on the hypergolic interaction between monomethylhydrazine and nitric acid", Combustion and Flame, 159, (1), pp. 438-447
  • N. Kumbhakarna, Stefan Thynell, A. Chowdhury and P. Lin, 2011, "Analysis of RDX-TAGzT pseudo-propellant combustion with detailed chemical kinetics", Combustion Theory and Modelling, 15, (6), pp. 933-956
  • A. Chowdhury and Stefan Thynell, 2010, "Confined rapid thermolysis/FTIR/ToF studies of methyl-amino-triazolium-based energetic ionic liquids", Thermochimica Acta, 505, (1), pp. 33-40.
  • A. Chowdhury and Stefan Thynell, 2010, "Kinetics of decomposition of energetic ionic liquids", Propellants, Explosives, Pyrotechnics, 35, (6), pp. 572-581
  • S. Wang, Stefan Thynell and A. Chowdhury, 2010, "Experimental study on hypergolic interaction between N,N,N',N'-tetramethylethylenediamine and nitric acid", Energy and Fuels, 24, pp. 5320-5330
  • A. Chowdhury, C. Bapat and Stefan Thynell, 2009, "Apparatus for probing preignition behavior of hypergolic materials", Review of Scientific Instruments, 80, (4), pp. 044101-4
  • K. K. Kuo, R. Acharya, E. Boyd and Stefan Thynell, 2009, "Pyrolysis/evaporation study of succinic acid/polyvinyl acetate for reducing nozzle throat erosion", Journal of Propulsion and Power, 25, (3), pp. 801-807
  • A. Chowdhury, Stefan Thynell and P. Lin, 2009, "Confined rapid thermolysis/FTIR/ToF studies tetrazolium-based energetic ionic liquids", Thermochimica Acta, 485, (1-2), pp. 1-13
  • C. Bapat and Stefan Thynell, 2008, "Effect of anisotropic electrical resistivity of gas diffusion layers on current density and temperature distribution in a PEM fuel cell", Journal of Power Sources, 185, (1), pp. 428-432
  • C. Bapat and Stefan Thynell, 2008, "Effect of anisotropic thermal conductivity of the GDL and current collector rib width on two-phase transport in a PEM fuel cell", Journal of Power Sources, 179, (1), pp. 240-251
  • C. Bapat and Stefan Thynell, 2007, "Anisotropic heat conduction effects in proton-exchange membrane fuel cells", Journal of Heat Transfer, 129, (9), pp. 1109-1118
  • M. Das and Stefan Thynell, 2006, "Two-dimensional conduction effects in estimating radiative heat flux from a capillary discharge", Journal of Thermophysics and Heat Transfer, 20, (4), pp. 903-911
  • M. Das, Stefan Thynell, J.-Q. Li and T. A. Litzinger, 2006, "Material dependence of plasma radiation produced by a capillary discharge", Journal of Thermophysics and Heat Transfer, 20, (3), pp. 595-603
  • J.-Q. Li, M. Das, T. A. Litzinger and Stefan Thynell, 2006, "Study of plasma-propellant interaction during normal impingement", Journal of Propulsion and Power, 22, (5), pp. 929-937
  • J.-Q. Li, T. A. Litzinger, M. Das and Stefan Thynell, 2006, "Recombination of elecrothermal plasma and decomposition of plasma-exposed propellants", Journal of Propulsion and Power, 22, (6), pp. 1353-1361
  • A. Chowdhury and Stefan Thynell, 2006, "Confined rapid thermolysis/FTIR/ToF studies of imidazolium-based ionic liquids", Thermochimica Acta, 443, (2), pp. 159-172
  • J.-Q. Li, T. A. Litzinger and Stefan Thynell, 2005, "Plasma ignition and combustion of JA2 propellant", Journal of Propulsion and Power, 21, (1), pp. 44-53
  • M. Das, Stefan Thynell, J.-Q. Li and T. A. Litzinger, 2005, "Transient radiative heat transfer from a plasma produced by a capillary discharge", Journal of Thermophysics and Heat Transfer, 19, (4), pp. 572-580
  • Jianquan Li, Thomas A. Litzinger and Stefan Thynell, 2004, "Interaction of capillary plasma with double-base and composite propellants", Journal of Propulsion and Power, 20, (4), pp. 675-683

Conference Proceeding

  • Tanusree Chatterjee and Stefan Thynell, 2018, "Development of gas-phase reaction mechanism for ammonium perchlorate using quantum mechanics calculations", Combustion Institute
  • Kaiqiang Zhang and Stefan Thynell, 2018, "Mechanism Development of Aqueous Hydroxylammonium Nitrate under Thermal Decomposition Conditions", Combustion Institute
  • Mayank Khichar, Lalit Patidar and Stefan Thynell, 2018, "Computational study of condensed-phase kinetics during combustion of pure RDX", Combustion Institute
  • Lalit Patidar, Stefan Thynell and Mayank Khichar, 2018, "Liquid-phase decomposition of RDX: Formation of oxy-s-triazine and 1,3,4-oxadiazole", Combustion Institute
  • Mayank Khichar, Lalit Patidar and Stefan Thynell, 2017, "Computational Analysis of RDX Thermolysis in Liquid State", Combustion Institute, pp. 6
  • Kaiqiang Zhang and Stefan Thynell, 2017, "Ab Initio Investigation of the Nitrosation Reactions of Hydroxylamine in Aqueous Solutions", Combustion Institute, pp. 6
  • Lalit Patidar, Mayank Khichar and Stefan Thynell, 2017, "A Quantum Mechanics Study on Early Decomposition Reactions for Liquid-phase HMX", Combustion Institute, pp. 6
  • Stefan Thynell and Kaiqiang Zhang, 2016, "Development of a chemical reaction mechanism for hydroxyl ammonium nitrate", Combustion Institute, pp. 6
  • Lalit Patidar and Stefan Thynell, 2016, "A quantum mechanics investigation for RDX ring-opening reactions", pp. 6
  • A. S. Hollinger and Stefan Thynell, 2015, "Thermal contact resistance measurements of gas diffusion layers in polymer electrolyte fuel cells", ASME 2015 Power and Energy Conversion Conference, Power Energy 2015
  • S. Q. Wang and Stefan Thynell, 2013, "Experimental investigation of pressure effect on ignition delay of monomethylhydrazine, 1,1-dimethylhydrazine, tetramethylethylenediamine and 2-dimethylaminoethylazide with nitric acid", National Combustion Meeting, Organized by the Western States Section of the Combustion Institute
  • S. Q. Wang and Stefan Thynell, 2013, "Decomposition and combustion of monomethylhydrazinium nitrates", 8th U. S. National Combustion Meeting, Organized by the Western States Section of the Combustion Institute
  • C. Bapat and Stefan Thynell, 2008, "Comparative evaluation of heating techniques for room temperature startup of a PEMFC", Sixth International Fuel Cell Science, Engineering and Technology Conference, FuelCell2008-65156
  • M. Das, A. Chowdhury and Stefan Thynell, 2007, "Radiative pyrolysis of JA2 from an electrochemical plasma discharge", 2007 Fall Technical Meeting, Eastern State Section of the Combustion Institute
  • A. Chowdhury and Stefan Thynell, 2007, "Confined rapid thermolysis/FTIR/ToF studies of TAGzT", 2007 Fall Technical Meeting, Eastern State Section of the Combustion Institute
  • Stefan Thynell and Kaiqiang Zhang, , "Development of a chemical reaction mechanism for aqueous hydroxylammonium nitrate", Eastern States of the Combustion Institute

Manuscript

  • N. Kumbhakarna and Stefan Thynell, , "Development of a reaction mechanism for liquid-phase decomposition of guanidinium 5-amino tetrazolate", Thermochimica Acta

Other

  • S. Wang and Stefan Thynell, 2011, "Experimental study on hypergolic interaction between monomethylhydrazine and nitric acid"
  • N. Kumbhakarna, S. Q. Wang and Stefan Thynell, 2011, "Recent studies on the confined rapid thermolysis of liquid-phase RDX using FTIR/ToFMS diagnostic techniques"
  • N. Kumbhakarna, S. Q. Wang and Stefan Thynell, 2011, "Condensed phase initial decomposition of RDX"
  • S. Q. Wang and Stefan Thynell, 2011, "Condensed- and gas-phase reactions between monomethylhydrazine and nitric acid from 20 to 250ÂșC"
  • M. R. Weismiller, A. Chowdhury, Stefan Thynell and R. A. Yetter, 2011, "Ammonia borane decomposition at high heating rates"
  • M. Das and Stefan Thynell, 2009, "ETC pyrolysis of a double-base propellant"
  • N. Kumbhakarna, Stefan Thynell and A. Chowdhury, 2009, "Modeling of RDX/TAGzT propellant combustion with detailed chemical kinetics"
  • A. Chowdhury, S. Wang and Stefan Thynell, 2009, "Ignition behavior of novel hypergolic materials"
  • A. Chowdhury and Stefan Thynell, 2006, "Confined rapid thermolysis/FTIR/ToF of triazolium-based energetic ionic liquids"
  • A. Chowdhury and Stefan Thynell, 2006, "Confined rapid thermolysis/FTIR/ToF studies tetrazolium-based energetic ionic liquids"
  • Stefan Thynell, A. Chowdhury, K. K. Kuo, E. Boyer, E. Boyd and B. C. Tappan, 2006, "Study on the rapid thermolysis behavior of DAATO-3.5: A high nitrogen compound"
  • K. K. Kuo, R. Acharya, E. Boyd and Stefan Thynell, 2006, "Pyrolysis study of SA/PVA as ablative material for boundary layer control system in high-pressure graphite rocket nozzles"
  • A. Chowdhury and Stefan Thynell, 2005, "Confined rapid thermolysis/FTIR/ToF studies of imidazolium-based ionic liquids"
  • A. Chowdhury and Stefan Thynell, 2005, "Confined rapid thermolysis/FTIR/ToF studies of triazolium-based ionic liquids"

Research Projects

  • April 2015 - April 2020, "Experimental and Quantum Mechanics Investigations for the Development of a Liquid-phase Chemical Reaction Mechanism of RDX," (Sponsor: Army Research Office).
  • November 2012 - October 2018, "MURI: Smart Functional Nanoenergetic Materials," (Sponsor: Air Force Office of Scientific Research).
  • July 2017 - July 2018, "Thermogravimetric Decomposition Studies of Energetic Materials," (Sponsor: Army Research Office).
  • July 2016 - June 2017, "Diagnostic System for Decomposition Studies of Energetic Materials," (Sponsor: Army Research Office).
  • May 2008 - April 2014, "Spray and Combustion of Gelled Hypergolic Propellants for Future Rocket and Missile Engines," (Sponsor: U.S. Department of the Army).

Honors and Awards

  • Member of the Academy of Distinguished Alumni, Mechanical Engineering, West Virginia University, April 2007 - April 2007
  • Associate Fellow, AIAA, July 2003 - July 2003
  • ASME Fellow, ASME, July 1999 - July 1999
  • AIAA Distinguished Service Award, AIAA, January 1994 - January 1994
  • NCAA Postgraduate Scholarship, NCAA, April 1980 - August 1981

Service

Service to Penn State:

  • Committee Work, Evaluator, MNE Admissions Committee, July 2008 - June 2020
  • Participation in Recruitment and Retention Activities, Mentor, Mentor, MNE Mentors, June 2014 - May 2019
  • Committee Work, , Laboratory Safety Committee, Mechanical and Nuclear Engineering Safety Committee, July 2013 - June 2018
  • Committee Work, Member, Promotion and Tenure Committee, July 2013 - June 2017
  • Committee Work, Member, Laboratories, July 2000 - June 2017
  • Committee Work, , College of Engineering Promotion and Tenure Committee, July 2011 - June 2013
  • Committee Work, , Promition and Tenure Committee, July 2009 - June 2011
  • Committee Work, , Graduate Council, July 2007 - June 2009
  • Committee Work, , Promotion and Tenure Committee, July 2001 - June 2005

Service to External Organizations:

  • Program DirectorNational Science Foundation, September 1999 - August 2001
 


 

About

With more than 60 faculty members, 330 graduate students, and 800 undergraduate students, the Department of Mechanical Engineering is innovating today what will impact tomorrow’s solutions to meeting our energy needs, homeland security, biomedical devices, and transportation systems. We offer B.S. degrees in mechanical engineering as well as resident (M.S., Ph.D.) and online (M.S., M.Eng.) graduate degrees in mechanical engineering. See how we’re inspiring change and impacting tomorrow at me.psu.edu.

The Ken and Mary Alice Lindquist Department of Nuclear Engineering at Penn State is one of the top ranked nuclear engineering programs in the United States. A strong focus on experimental research distinguishes us from many other programs. Our actively growing program has 8 faculty members and almost 90 graduate students. In the Radiation Science and Engineering Center, nuclear engineering students can take advantage of the Breazeale Nuclear Reactor, the longest operating university research reactor in the country. Visit nuce.psu.edu for more information.

Department of Mechanical and Nuclear Engineering

137 Reber Building

The Pennsylvania State University

University Park, PA 16802-4400

Phone: 814-865-2519