Horizontal Combinations

Combustion Kinetics Laboratory

Aerospace and Mechanical Engineering

Professor Hai Wang











Soot Formation


Probe Sample/SMPS characterization of Particle Size Distribution Function

Soot is generated from a premixed flat flame.  Particles are drawn into the sampling probe and nearly instantaneously diluted.  A small sample is introduced into SMPS for particle sizing and number density measurement.


Small Angle Neutron Scattering

Scattering intensity is detected by neutron scattering at small angles.  The intensity may be inverted to yield soot particle number density


Atomic Force Microscopy allows us to examine the morphology of nascent soot particles upon impact with the mica surface.



Representative Publications


Zhao, B., Yang, Z., Johnston, M. V., Wang, H., Wexler, A. S., Balthasar, M., and Kraft, M. “Measurement and numerical simulation of soot particle size distribution functions in a laminar premixed ethylene-oxygen-argon flame.” Combustion and Flame 133, pp. 173-188 (2003).


Zhao, B., Yang, Z., Wang, J., Johnston, M. V. and Wang, H. “Analysis of soot nanoparticles in a laminar premixed ethylene flame by scanning mobility particle sizer.” Aerosol Science and Technology 37, 611-620 (2003).


Zhao, B., Yang, Z., Li, Z., Johnston, M. V., and Wang, H. “Particles size distribution function of incipient soot in laminar premixed ethylene flames: effect of flame temperature.” Proceedings of the Combustion Institute, 30, 1441-1448 (2005).


Singh, J., Patterson, R. I. A., Kraft, M., and Wang, H. “Numerical simulation and sensitivity analysis of detailed soot particle size distribution in laminar premixed ethylene flames.” Combustion and Flame, 145, pp. 117-127 (2006).


Zhao, B., Uchikawa, K., and Wang, H. “A comparative study of nanoparticles in premixed flames by scanning mobility particle sizer, small angle neutron scattering, and transmission electron microscopy,” Proceedings of the Combustion Institute, 31, pp. 851-860 (2007).


Thierley, M., Grotheer, H.-H., Aigner, M., Yang, Z., Abid, A. D., Zhao, B. and Wang, H. “On existence of nanoparticles below sooting threshold.” Proceedings of the Combustion Institute, 31, pp. 639-647 (2007).