Flow field studies of diamond shaped fuel injector in a supersonic flow Conference Paper uri icon


  • Studies were performed to characterize the flow structure and the mixing characteristics of a diamond port flush-wall fuel injector at Mach 2.0 airflow. The goals were to examine the flow structure in the near-field region of diamond and circular port injectors and to quantify the effects of igniter torch flow on the near-field flow structure with and without torch gas. Planar laser-induced fluorescence was used to document the flow trajectories and the injector barrel shock shape for the injectors. For the inert mixing studies, the flow was seeded with a nitric oxide (NO) trace probe molecule, while for the reacting experiments, naturally occurring hydroxyl (OH) was used. The present experiments confirmed recent computation results that implied that under certain conditions, a diamond shaped injector port could be tailored to improve mixing and produce an additional secondary flow structure with gas-dynamic flame-holding potential. It was also shown that an igniter torch system could be incorporated without adversely affecting the tailored flow structure.

published proceedings

  • Collection of Technical Papers - 43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference

author list (cited authors)

  • Kobayashi, K., Bowersox, R., Srinivasan, R., Carter, C. D., & Hsu, K. Y.

complete list of authors

  • Kobayashi, K||Bowersox, RDW||Srinivasan, R||Carter, CD||Hsu, KY

publication date

  • December 2007