SHENGKAI WANG EDUCATION Phone: +1 (650) 391-6853 Email: sk.wang@stanford.edu Address: 418 Panama Mall, Rm. 106 Stanford, CA, 94305 Ph.D. in Mechanical Engineering, Stanford University, Stanford, CA 01/2017 Dissertation supervised by Prof. Ronald K. Hanson: Shock Tube / Laser Absorption Study of Aldehydes Kinetics Ph.D. dissertation focused on: (1) the development and application of laser absorption diagnostics for quantitative formaldehyde and acetaldehyde measurements in hydrocarbon combustion systems; (2) shock tube studies of the fundamental rate constants of aldehydes combustion reactions, including the unimolecular decomposition reaction and H-abstraction reactions by H and OH; and (3) the development of cavity-enhanced absorption diagnostics to improve future combustion kinetic studies in shock tubes (initial demonstrations successfully increased the detection sensitivities of several key species by 20-140 times). Research resulted in over 10 peerreviewed publications. Minored in Electrical Engineering. Specialized in nonlinear optics, laser dynamics, digital signal processing, convex optimization, software and hardware systems M.S. in Mechanical Engineering, Stanford University, Stanford, CA 06/2012 Majored in Thermosciences B.S. in Mechanical Engineering, Peking University, Beijing, China 06/2010 Majored in Theoretical and Applied Mechanics Recipient of China s national award (XU Zhilun Prize) for Excellent Students in Mechanics (2008) CURRENT RESEARCH Postdoctoral Scholar Hanson Research Group, Mechanical Engineering, Stanford University, CA 10/2016-Present Current research focuses on development and application of precision laser diagnostics for studies of high-temperature gasdynamics, combustion kinetics and novel energy conversion concepts. Representative projects include: (1) Ultra-sensitive and noise-immune laser absorption diagnostic for hydroxyl radical (OH). Project aims to improve OH detection limit in shock tubes and other reactors to 10-ppb level, allowing direct study of OH kinetics in the NTC regime of hydrocarbon oxidation for the first time. (2) Time-resolved cavity-enhanced absorption spectroscopy for carbon monoxide (CO) in compact reaction systems. Project aims to provide a versatile strategy for interference-free detection of CO at ppb/hz 1/2 -level of normalized sensitivity in compact (1 cm or less) reactor geometry. (3) High-speed and ultra-sensitive laser absorption measurement of excited oxygen atom (O*) in shock-heated oxygen and air at T > 8000 K. Project aims to improve the understanding of energy transfer processes in high-enthalpy air, a scientific problem that is essential to space shuttle reentry and other aeronautic and astronautic applications. PUBLICATIONS Authored 38 publications, including 26 journal articles and 12 conference papers. 1
JOURNAL PUBLICATIONS 1. S. Wang, R. K. Hanson, Ultra-sensitive spectroscopy of OH radical in high-temperature transient reactions, Optics Letters, In press, Early Posting Doc. ID: 331329 2. S. Wang, D. F. Davidson, R. K. Hanson, Shock tube measurements of OH time-histories in benzene, toluene, ethylbenzene and xylene oxidation, Proceedings of the Combustion Institute, In press, DOI: 10.1016/j.proci.2018.06.116 3. J. Shao, Y. Zhu, S. Wang, D.F. Davidson, R.K. Hanson, A shock tube study of jet fuel pyrolysis and ignition at elevated pressures and temperatures, Fuel, 226 (2018) 338-344 4. R. Xu, K. Wang, S. Banerjee, J. Shao, T. Parise, Y. Zhu, S. Wang, A. Movaghar, D. J. Lee, R. Zhao, X. Han, Y. Gao, T. Lu, K. Brezinsky, F. N. Egolfopoulos, D. F. Davidson, R. K. Hanson, C. T. Bowman, H. Wang, A physics-based approach to modeling real-fuel combustion chemistry - II. reaction kinetic models of jet and rocket fuels, Combustion and Flame, 193 (2018) 520-537 5. S. Wang, R. K. Hanson, High-sensitivity 308.6-nm laser absorption diagnostic optimized for OH measurement in shock tube combustion studies, Applied Physics B, 124 (2018) 37-43 6. S. Wang, D. F. Davidson, R. K. Hanson, A shock tube and laser absorption study of CH2O oxidation via simultaneous measurements of OH and CO, Journal of Physical Chemistry A, 121 (2017) 8561 8568 7. S. Wang, T. Parise, S. E. Johnson, D. F. Davidson, R. K. Hanson, A new diagnostic for hydrocarbon fuels using 3.41-µm diode laser absorption, Combustion and Flame, 186 (2017), 129-139. 8. S. Wang, D. F. Davidson, J. B. Jeffries, R. K. Hanson, Time-resolved sub-ppm CH3 detection in a shock tube using cavity-enhanced absorption spectroscopy with a ps-pulsed UV laser, Proceedings of the Combustion Institute, 36 (2017) 4549-4556. 9. S. Wang, D. F. Davidson, R. K. Hanson, Shock tube measurements for the rate constants of long, branched, and unsaturated aldehydes with OH at elevated temperatures, Proceedings of the Combustion Institute, 36 (2017) 151-160. 10. M. Nations, S. Wang, C. S. Goldenstein, D. F. Davidson, R. K. Hanson, Kinetics of Excited Oxygen Formation in Shock-Heated O2 Ar Mixtures. Journal of Physical Chemistry A, 120 (2016) 8234-8243. 11. S. Wang, D. F. Davidson, R. K. Hanson, Shock tube measurement for the dissociation rate constant of acetaldehyde using sensitive CO diagnostics, Journal of Physical Chemistry A, 120 (2016) 6895-6901. 12. S. Wang, D. F. Davidson, R. K. Hanson, Improved shock tube measurement of the CH4 + M = CH3 + H + M rate constant using UV cavity-enhanced absorption spectroscopy of CH3, Journal of Physical Chemistry A, 120 (2016) 5427-5434. 13. S. Wang, K. Sun, D. F. Davidson, J. B. Jefferies, R. K. Hanson, Cavity-enhanced absorption spectroscopy with a ps-pulsed UV laser for sensitive, high-speed measurements in a shock tube, Optics Express, 24 (2016) 308-318. 14. S. Wang, K. Sun, D. F. Davidson, J. B. Jeffries, R. K. Hanson, Shock-tube measurement of acetone dissociation using cavity-enhanced absorption spectroscopy of CO. Journal of Physical Chemistry A, 119 (2015) 7257-7262. 2
15. S. Wang, D. F. Davidson, R. K. Hanson, High temperature measurements for the rate constants of C1 C4 aldehydes with OH in a shock tube. Proceedings of the Combustion Institute, 35 (2015) 473-480. 16. M. F. Campbell, S. Wang, C. S. Goldenstein, R. M. Spearrin, A. M. Tulgestke, L. T. Zaczek, D. F. Davidson, R. K. Hanson, Constrained reaction volume shock tube study of n-heptane oxidation: Ignition delay times and time-histories of multiple species and temperature. Proceedings of the Combustion Institute, 35 (2015) 231-239. 17. M. Nations, S. Wang, C. S. Goldenstein, K. Sun, D. F. Davidson, J. B. Jefferies, R. K. Hanson, Shock-tube measurements of excited oxygen atoms using cavity-enhanced absorption spectroscopy, Applied Optics, 54 (2015) 8766-8775. 18. S. Wang, S. Li, D. F. Davidson, R. K. Hanson, Shock tube measurement of the high-temperature rate constant for OH+ CH3 products. Journal of Physical Chemistry A, 119 (2015) 8799-8805. 19. R. Sur, S. Wang, K. Sun, D. F. Davidson, J. B. Jeffries, R. K. Hanson, High-sensitivity interference-free diagnostic for measurement of methane in shock tubes. Journal of Quantitative Spectroscopy and Radiative Transfer, 156 (2015) 80-87. 20. K. Sun, S. Wang, R. Sur, X. Chao, J. B. Jeffries, R. K. Hanson, Time-resolved in situ detection of CO in a shock tube using cavity-enhanced absorption spectroscopy with a quantum-cascade laser near 4.6 µm. Optics Express, 22 (2014) 24559-24565. 21. K. Sun, S. Wang, R. Sur, X. Chao, J. B. Jeffries, R. K. Hanson, Sensitive and rapid laser diagnostic for shock tube kinetics studies using cavity-enhanced absorption spectroscopy. Optics Express, 22 (2014) 9291-9300. 22. S. Wang, E. E. Dames, D. F. Davidson, R. K. Hanson, Reaction rate constant of CH2O+ H= HCO+ H2 revisited: A combined study of direct shock tube measurement and transition state theory calculation. Journal of Physical Chemistry A, 118 (2014) 10201-10209. 23. S. Xu, D. Thian, S. Wang, Y. Wang, F. B. Prinz, Effects of size polydispersity on electron mobility in a two-dimensional quantum-dot superlattice. Physics Review B, 90 (2014) 144202. 24. Z. Hong, K. Y. Lam, R. Sur, S. Wang, D. F. Davidson, R. K. Hanson, On the rate constants of OH+ HO2 and HO2+ HO2: A comprehensive study of H2O2 thermal decomposition using multispecies laser absorption. Proceedings of the Combustion Institute, 34 (2013) 565-571. 25. S. Wang, D. F. Davidson, R. K. Hanson, R. K. High-temperature laser absorption diagnostics for CH2O and CH3CHO and their application to shock tube kinetic studies. Combustion and Flame, 160 (2013) 1930-1938. 26. R. K. Hanson, G. A. Pang, S. Chakraborty, W. Ren, S. Wang, D. F. Davidson, Constrained reaction volume approach for studying chemical kinetics behind reflected shock waves. Combustion and Flame, 160 (2013) 1550-1558. In Review G. Shen, K. Sun, X. Chao, S. Wang, R. K. Hanson, Cavity-enhanced absorption spectroscopy for shock tubes: design and optimization, submitted to Proceedings of the Combustion Institute M. F. Campbell, S. Wang, D. F. Davidson, R. K. Hanson, Shock tube study of normal heptane first-stage ignition near 3.5 atm, submitted to Combustion and Flame 3
CONFERENCE PRESENTATIONS 1. S. Wang, D. F. Davidson, R. K. Hanson, A shock tube study of CH2O oxidation via simultaneous laser absorption measurements of CO and OH, 10th International Conference on Chemical Kinetics, 2017 2. S. Wang, T. Parise, D. F. Davidson, R. K. Hanson, A new diagnostic for hydrocarbon fuels using 3.41-µm diode laser absorption, US 10th National Combustion Meeting, 2017 3. J. Shao, Y. Zhu, S. Wang, D. F. Davidson, R. K. Hanson, Shock Tube Study of Jet Fuel Pyrolysis and Ignition at Elevated Pressure, US 10th National Combustion Meeting, 2017 4. R. Xu, D. Chen, K. Wang, Y. Tao, J. K. Shao, T. Parise, Y. Zhu, S. Wang, R. Zhao, D. J. Lee, F. N. Egolfopoulos. HyChem Model: Application to Petroleum-Derived Jet Fuels. US 10th National Combustion Meeting, 2017 5. D. F. Davidson, Y. Zhu, S. Wang, T. Parise, R. Sur, R. K. Hanson, Shock Tube Measurements of Jet and Rocket Fuels, 54th AIAA Aerospace Sciences Meeting, 2016 6. Y. Zhu, S. Wang, D. F. Davidson, R. K. Hanson, Shock Tube Measurements of Species Time- Histories during Jet Fuel Pyrolysis and Oxidation, 25th International Colloquium on the Dynamics of Explosions and Reactive Systems, 2015 7. Y. Zhu, S. Wang, R. K. Hanson, D. F. Davidson, Shock Tube/Laser Absorption Measurements of Jet Fuel Pyrolysis and Oxidation, 53rd AIAA Aerospace Sciences Meeting, 2015 8. D. F. Davidson, A. Tulgestke. Y. Zhu, S. Wang, R. K. Hanson, Species Time-History Measurements during Jet Fuel Pyrolysis, 30th International Symposium on Shock Waves, 2015 9. S. Wang, D. F. Davidson, R. K. Hanson, Laser Absorption Diagnostics for Aldehydes in Shock Tube Kinetics Studies, 29th International Symposium on Shock Waves, 2013 10. R. K. Hanson, S. Chakraborty, G. A. Pang, W. Ren, S. Wang, D. F. Davidson, Constrained Reaction Volume: A New Approach to Studying Reactive Systems in Shock Tubes, 29th International Symposium on Shock Waves, 2013 11. R. K. Hanson, S. Chakraborty, G. A. Pang, W. Ren, S. Wang, D. F. Davidson, Constrained Reaction Volume: A Strategy for Reflected Shock Wave Kinetics Experiments, 24th International Colloquium on the Dynamics of Explosions and Reactive Systems, 2013 12. K. Y. Lam, D. Vinh, S. Wang, Z. Hong, D. F. Davidson and R. K. Hanson, Shock Tube Ignition Delay Time Measurements of Propane/O2/Ar Mixtures at Near-Constant-Volume Conditions, WSS/CI 2009 Fall Meeting, 2009 GRANTS Significantly contributed to the development and writing of several research proposals of Prof. Ronald K. Hanson. Grants awarded including: NSF Grant CBET-1508748: Shock Tube Measurements of Aldehyde and Ketone Rate Constants Using Enhanced Laser Absorption, $345,000 / 3yrs AROFR-DURIP FA9550-16-1-0291: Optical Diagnostics for High-Temperature Air, $284,040 / 1yr AFOSR Grant (pending grant #): Laser Diagnostics for Reacting Flows, $950,000 / 4yrs 4
TEACHING & MENTORING Course Assistant for Stanford Graduate Lab Class (Spectroscopy Lab) Spring 2015 2017 Designed and TAed two new labs that were adopted as core sections of Stanford ME 367 Lab Course. Teaching Assistant for Stanford Graduate Class (Chemical Kinetics) Winter 2015 Hosted tutorial and problem sessions; developed course assignments and exam questions; incorporated practical examples from daily life into teaching and motivated student learning. Student Mentoring 2012-Present Mentored and managed multiple undergraduates, graduate students and visiting scholars in lab and research activities as part of senior graduate and postdoc responsibilities. HONORS & AWARDS Bernard Lewis Fellowship, by The Combustion Institute 2016 A prestigious international award for high-quality research by young combustion scientists. One of 5 recipients from over 1500 participants of the International Symposium on Combustion. Chinese Government Award for Outstanding Self-Financed Students Abroad 2015 One of 500 recipients across the world. XU Zhilun Prize for Excellent Students in Mechanics, by Chinese Society of Mechanics 2008 A national award for extraordinary academic performance in mechanics major. One of 100 recipients in China. The only student nominated and awarded at Peking University. PROFESSIONAL MEMBERSHIP The Optical Society The International Society for Optics and Photonics The Combustion Institute 09/2016-Present 02/2016-Present 06/2014-Present ACADEMIC SERVICES Reviewer for Applied Physics B, Sensors, Optics Express, Combustion and Flame, Fuel, Energy & Fuels, Combustion Science and Technology, Journal of Propulsion and Power, Journal of Thermophysics and Heat Transfer, and Journal of Quantitative Spectroscopy and Radiative Transfer. 5