TIMOTHY C. ALLISON
Manager
Southwest Research Institute (SwRI)
Dr. Allison’s research interests include advanced energy systems, turbomachinery design and testing, oxy-combustion, instrumentation and control, blade and impeller dynamics, valve dynamics, finite element analysis, system identification, condition monitoring, and time and frequency domain signal processing methods. He is experienced in applying these capabilities to analyze, design, and solve problems with rotating machinery including gas turbines, centrifugal compressors, turboexpanders, reciprocating compressors, steam turbines, wind turbines, bearing and transmission test rigs, rocket pumps, industrial fans, and pressure safety valves. He also has skills and experience with test rig design, fabrication, and operation from the 1 kW to 3 MW scale, including modal testing, machinery vibration testing, trim balancing, compressor, turbine, and pump performance testing, and failure analysis of machinery.
While at Southwest Research Institute, Dr. Allison has developed new methods for analysis of turbomachinery blade stresses, gas foil bearing force coefficients, pressure safety valve dynamic instabilities, and high-frequency piping vibrations. He has successfully managed numerous projects, including development and test projects, root cause failure analyses, research programs involving reciprocating compressor valves and bolted joints in high vibration environments, and a study and comparison of existing and proposed gas turbine starter options. His development and test experience encompasses new turbomachinery technologies, including novel supercritical CO2 turbines and compressors, a high-pressure oxy-fuel combustor, a high-temperature gas turbine recuperator, internally cooled diaphragms for CO2 compression, a downhole processing and compression tool, gas foil bearings, and reciprocating compressor valves. He has also developed instrumentation setups and LabVIEW programs to manage the operation, condition monitoring, data acquisition, and data reduction for compressor, pump, and turbine test rigs.
Dr. Allison’s doctoral work dealt with constructing black-box predictive models for time-varying and nonlinear vibratory systems from experimental measurements. A new identification method based on the proper orthogonal decomposition was developed and validated with experimental test data. His master’s thesis focused on developing and implementing efficient structural dynamics analysis algorithms for multiprocessor computers. During two internships at Sandia National Laboratories, he participated in the validation of existing finite element models with experimental data and researched new methods for constructing predictive dynamics models from test data.
PATENTS & PUBLICATIONS: Co-Inventor of a squeeze film damper valve for reciprocating compressors; Authored and co-authored 10 journal papers, 49 conference papers and three book chapters; Presented 52 tutorials, no-paper presentations, and short course modules on turbomachinery and structural dynamics topics; Associate Editor of the ASME Journal of Engineering for Gas Turbines and Power.
HONORS & AWARDS: ASME International Gas Turbine Institute Oil & Gas Committee Best Paper/Tutorial Awards in 2015/2014; ASME International Gas Turbine Institute Young Engineer Travel Award, 2011; ASME International Gas Turbine Institute Best Application Tutorial Award, 2010; National Physical Science Consortium Fellow (funded by Sandia National Laboratories), 2006-7; Virginia Space Grant Consortium Fellow, 2006-7.
PROFESSIONAL CHRONOLOGY: Sandia National Laboratories: graduate student intern, 2005-6; Virginia Polytechnic Institute and State University: Ph.D. candidate, 2006-7; Southwest Research Institute: 2007-[research engineer, 2007-11; senior research engineer, 2011-14; group leader, 2014-15; manager, 2015-present].
MEMBERSHIPS: American Society of Mechanical Engineers, American Institute for Aeronautics and Astronautics, Society for Experimental Mechanics, Phi Beta Kappa (Honor Society), Sigma Gamma Tau (Honor Society).
EDUCATION:
Ph.D., Mechanical Engineering, Virginia Polytechnic Institute and State University, 2007 M.S., Aerospace Engineering, University of Texas at Austin, 2005
B.S., Aerospace Engineering with High Honors, University of Texas at Austin, 2004