Simulation of a supersonic hydrogen-air autoignition-stabilized flame using reduced chemistry Articles uri icon

authors

  • BOIVIN, PIERRE PASCAL MAURICE
  • Dauptain, A
  • JIMENEZ SANCHEZ, MARIA DEL CARMEN
  • CUENOT, BENEDICTE

publication date

  • April 2012

start page

  • 1779

end page

  • 1790

issue

  • 4

volume

  • 159

international standard serial number (ISSN)

  • 0010-2180

electronic international standard serial number (EISSN)

  • 1556-2921

abstract

  • A three-step mechanism for H2-air combustion (Boivin et al., Proc. Comb. Inst. 33 (2010)) was recently designed to reproduce both autoignition and flame propagation, essential in lifted flame stabilization. To study the implications of the use of this reduced chemistry in the context of a turbulent flame simulation, this mechanism has been implemented in a compressible explicit code and applied to the simulation of a supersonic lifted co-flowing hydrogen&-air flame. Results are compared with experimental measurements (Cheng et al., C&F (1994)) and simulations using detailed chemistry, showing that the reduced chemistry is very accurate. A new explicit diagnostic to readily identify autoignition regions in the post-processing of a turbulent hydrogen flame simulation is also proposed, based on variables introduced in the development of the reduced chemical mechanism.

keywords

  • turbulent autoignition; hydrogen; reduced chemistry; supersonic flame