Dr. Raymond L. Speth

EducationRay Speth

  • Ph.D. in Mechanical Engineering, MIT, 2010
  • M.S. in Mechanical Engineering, MIT, 2006
  • B.S. in Mechanical Engineering, MIT, 2003

Fields: Combustion, Numerical methods, Environmental impacts of energy systems

Lab Role: Associate Director

Email: speth@mit.edu

My research interests are in the development of sustainable energy technologies for both stationary power generation and transportation needs. I have a particular interest in the development of efficient numerical simulation tools which can be used to solve problems in these areas. I am the primary developer and maintainer of Cantera, an open-source chemical kinetics, thermodynamics, and transport package. I am also the author of Ember, a tool for simulating unsteady strained and quasi-1D flames. Some of my recent work has been on evaluating the role of fuel properties and standards in determining the environmental impacts of transportation fuels, assessing the environmental impacts of future supersonic commercial aircraft, and developing models to investigate the impacts of aircraft contrails.

Selected Publications:

S. R. H. Barrett, R. L. Speth, S. D. Eastham, I. C. Dedoussi, A. Ashok, R. Malina, D. W. Keith. Impact of the Volkswagen emissions control defeat device on US public health. Environ. Res. Lett. 10 (2015), 114005. doi:10.1088/1748-9326/10/11/114005

R. L. Speth, C. Rojo, R. Malina, S. R. H. Barrett. Black carbon emissions reductions from combustion of alternative jet fuels. Atmospheric Environment 105 (2014), 37–42. doi:10.1016/j.atmosenv.2015.01.040

E. W. Chow, J. B. Heywood, R. L. Speth, Benefits of a Higher Octane Standard Gasoline for the U.S. Light-Duty Vehicle Fleet. SAE Technical Paper No. 2014-01-1961 (2014). doi:10.4271/2014-01-1961

R. L. Speth, E. W. Chow, R. Malina, S. R. H. Barrett, J. B. Heywood, W. H. Green. Economic and Environmental Benefits of Higher-Octane Gasoline. Environmental Science & Technology 48 (2014), 6561–6568. doi:10.1021/es405557p

S. Hong, S. J. Shanbhogue, R. L. Speth, A. F. Ghoniem. On the phase between pressure and heat release fluctuations for propane/hydrogen flames and its role in mode transitions. Combustion and Flame 160 (2013), 2827–2842. doi:10.1016/j.combustflame.2013.07.001

R. L. Speth, W. H. Green, S. MacNamara, and G. Strang. Balanced splitting and rebalanced splitting. SIAM Journal on Numerical Analysis 51 (2013), no. 6, 3084-3105. doi:10.1137/120878641

S. S. Merchant, E.F. Zanoelo, R. L. Speth, M. R. Harper, K. M. Van Geem, and W. H. Green, Combustion and pyrolysis of iso-butanol: Experimental and chemical kinetic modeling study, Combustion & Flame 160 (2013), no. 10, 1907-1929. doi:10.1016/j.combustflame.2013.04.023

S. Hong, R. L. Speth, S. J. Shanbhogue, and A. F. Ghoniem, Examining flow-flame interaction and the characteristic stretch rate in vortex-driven combustion dynamics using PIV and numerical simulation, Combustion & Flame 160 (2013), no. 8, 1381-1397. doi:10.1016/j.combustflame.2013.02.016

H. M. Altay, K. S. Kedia, R. L. Speth, and A. F. Ghoniem, Two-dimensional simulations of steady perforated-plate stabilized premixed flames, Combustion Theory & Modelling 14 (2010), no. 1, 125-154. doi:10.1080/13647831003660859

H. M. Altay, R. L. Speth, D. E. Hudgins, and A. F. Ghoniem, The impact of equivalence ratio oscillations on combustion dynamics in a backward-facing step combustor, Combustion & Flame 156 (2009), 2106-2116. doi:10.1016/j.combustflame.2009.07.024

R. L. Speth and A. F. Ghoniem, Using a strained flame model to collapse dynamic mode data in a swirl-stabilized syngas combustor, Proceedings of the Combustion Institute 32 (2009), 2993-3000. doi:10.1016/j.proci.2008.05.072

R. L. Speth, H. M. Altay, D. E. Hudgins, and A. F. Ghoniem, Dynamics and stability limits of syngas combustion in a swirl-stabilized combustor, ASME Turbo Expo, vol. 3, June 2008, ASME Paper GT2008-51023, pp. 767-776. doi:10.1115/GT2008-51023