Stephen Barthelson has over 30 years of experience in aerothermal/CFD engineering. He holds a PhD in mechanical engineering and has worked for companies such as NASA, GE Aircraft Engines, Hunter Fan, and Capstone Turbine conducting CFD analysis and simulations. His areas of expertise include thermal modeling, combustion modeling, turbomachinery analysis, and providing 3D CFD flow analysis of engine and fan components. Currently he is seeking a position as an aerothermal/CFD engineer where he can improve products and enhance profitability with his skills and experience.

1. STEPHEN H. BARTHELSON AEROTHERMAL/CFD ENGINEER
2540 Ogden Avenue, Downers Grove, IL 60515 • sbarthelson@cox.net• 256-479-0548 cell
OBJECTIVE
Aerothermal/CFD analysis position with a company that would benefit from an experienced and
versatile individual that could improve products and enhance profitability.
EDUCATION
University of Toledo, PhD ME, 1988 (G.P.A. 3.6/4.0)
University of Virginia, ME ME, 1976
Vassar College, BA Physics, 1974
Brigham Young University, Postdoc ME, 1990–1993
Purdue University, Postdoc ME, 1988
PROFESSIONAL EXPERIENCE:
Zero Chaos at Sun Coke, Lisle, IL
CFD Analyst
 Fluent modeling of duct flow in coke plant
 Combustion modeling in coke ovens
Belcan at Rolls Royce, Indianapolis, IN
Thermal Analyst
 SC03 thermal modeling of aircraft turbines & gearbox oil spray analysis
 Static stress analysis using Ansys (classic & workbench) & Nastran; help w IUPUI senior projects
Analytical Services & Materials, Hampton, VA
Analyst for NASA Langley 2008-12
 Thermal Desktop modeling of NASA Constellation components
 CFD Analysis for aircraft & trucks using NASA Langley’s usm3d code & CFX
Capstone Turbine Corporation, Chatsworth, CA 2007
AeroPerformance Engineer
Provide cycle deck & turbomachinery analysis & testing of microturbines
 Provide 3-d CFX flow analysis of engine components such as compressors & turbines
 Cycle deck analysis & development
 Support for existing Capstone C30 & C65 engines-& Development of C200 engine
 Test Cell & Compressor rig experience
 CatiaV & SAP experience
Hunter Fan Company, Memphis, TN 2004-2006
Project Engineer
Provide flow analysis/design for Hunter’s fans and home comfort products
 Provided 3-d CFX flow analysis of axial, centrifugal, or mixed flow fans or blowers
 Lab tested such components in Hunter’s lab
 Designed new padless humidifier with lower power consumption & new air purifier

2.  Developed high cfm/watt ceiling fans & assisted w industrial/portable fan designs
 ProE & ICEM experience
Belcan at GE Aircraft Engines, Evendale, OH 2001 – 2004
Senior Engineer
Provided support-especially for GE Aircraft Engine Engineering Tools Group
 Performed 3-d heat transfer, STAR-CD solution, analysis of cooled turbine stages to eliminate
turbine design flaws stemming from the use of inferior 2-d analysis.
 Provided detailed 3-d heat transfer inputs to hot gas path lifing study directed specifically at
durability problems with a GE CFM56 engine single stage high turbine.
 Involved with compressor and turbine map generation program revision and documentation (code
used 1-d blade row analysis to enhance or replace rig test data in generating maps).
 Performed 3-d numerical heat transfer (combustion included) modeling of a CFM Taps combustor
(new GE low NOx combustor design-interchangeable with older CFM designs) using FLUENT.
CSC & PRC, Wallops Flight Facility, Wallops Island, VA 1996 - 2000
Mission Analyst (sounding rockets and high altitude balloons)
Performed aero analysis using GEM 3-DOF & 6-DOF trajectory coding, with drag tables from
Wallops code and fin & body lift tables from TAD code) of suborbital sounding rockets for
performance and flight worthiness, prior to their launch.
 Used CFD to study missile viscous flows (around drag plates) and balloon thermodynamics.
 Interacted with experimenters external to WFF to insure that their sponsored rockets met
expectations.
 Published reports for over a dozen missions supported.
 Served on review panels to help scrutinize other mission analysts’ upcoming launches.
 Defended launch analysis and assisted with launch support operations.
Louisiana Compressor Maintenance, Houma, LA 1995 - 1996
Research Associate
Studied gas engine emissions with an eye toward retrofit cleanup devices that could allow older
engines to operate and meet emission compliance without extensive redesign.
 Performed turbocharger matching to assure engines were fit with the right size turbocharger.
 Developed computer programs to size compressor rig components (pulsation bottles, cylinder
bores, scrubbers, pipes).
 Used CFD to find pressure drops in pulsation bottles and other components.
Lehigh University, Bethlehem, PA 1994
Research Associate, Energy Research Center:
Performed 3-d CFD utility furnace modeling used in NOx sensitivity studies.
 Gained power plant experience by gathering furnace dimensions at Alexandria, VA power plant
and working with spreadsheet data from other facilities.
 Performed stack flow analysis by writing program for determining pressure drops in power plant
stacks in response to a stack venting problem.
Brigham Young University, Provo, UT 1990 - 1993
Research Associate, ACERC
Responsible for CFD coal combustion code development.
 Upgraded existing 3-d gaseous combustion code to model all types of furnace inlets.
 Compared simulations to experimental data for code verification.
 Developed a fast & robust new turbulence model (typically several times faster than a standard k-

3. epsilon model).
Fleck Aerospace, Tucson, AZ 1988 - 1990
Research and Development Engineer
Responsibility for CFD simulation (1-d, 2-d and 3-d) of test article related to non-pulsating,
stationary jet thrust w/o moving parts for new NASP jet engine prototype. NASA SBIR grant-
and private funding provided salary.
 Assisted with instrumentation design for measuring test article performance.
 Purdue post doctoral modeling project, including development of fast, innovative, supersonic
marching algorithm as part of job training.
 Provided development code for test article, derived from Purdue modeling experience.
 Performed test article simulation and comparison to Wyle Lab test data.
 Assisted with project final report.
University of Toledo, Toledo, OH 1982 - 1987
Teaching and Research Assistant
Provided money for graduate study consisting of dissertation related research on applying
multigrid methods to turbulent flows for NASA Lewis (CFD project carried out on university’s
IBM mainframe)
 Research support
 Graded thermodynamics homework & supervised energy lab (including small wind tunnel)
Teledyne CAE, Toledo, OH 1980 - 1982
Performance Engineer
Provided small jet engine performance support of JTDE, ATEGG & Harpoon cruise missile
engines.
 1-d performance simulation & test cell testing of jet engines..
 Simulated aircraft performance (engine-airframe interaction study).
Pratt & Whitney, East Hartford, CT 1978 - 1979
Performance & Stability and Control Engineer
Large Turbofan Engine Performance/ Stability & Control Support.
 1-d performance simulation (using PWA’s SOAP code) of JT8D-209 &-217 turbofans
 Conducted stability & control analysis and outdoor test stand testing for JT9D-7Q fans & nozzles
to eliminate stalls (included purposely induced fan & core stalls).
SKILLS
FORTRAN, Matlab, Microsoft-Word, Power Point, & Excel, UG, STAR, ICEM, Fluent, ProE,
Catia, Nastran, Ansys Classic & Workbench, CFX, Thermal Desktop.
AFFILIATIONS
ASME, National Merit Scholar as undergraduate
PUBLICATIONS
"Model Comparisons with Drop Tube Combustion Data for Various Devolatilization Submodels", Energy and Fuels,
Vol. 9, Issue No. 5, pp. 870-879 (Brewster, Smoot, Thornock coauthors),1994.
"A Partial Slip, Constant Eddy Diffusivity Turbulence Model", ASME Forum on Turbulent Flows, FED-Vol. 155, June

4. 1993.
"Acceleration of a Two-dimensional Combustion Code Using MOSI to Solve the Pressure and Pressure Correction
Fields for a SIMPLER Based Algorithm", Applied Mathematics and Computation, Dec. 1991.
NAS3-25461 "Proof of Concept Tests of Fleck Engine Concept", 1991. (Neil Hartman coauthor)
"The Modified Operator Strongly Implicit Scheme, MOSI, as a Fast Elliptic Solver", Applied Mathematics and
Computation, Oct. 1989.
"Applications of Multigrid Methods to Turbulent Incompressible Flows", PhD Dissertation, June 1988.