- Author
-
Bryant, R. A.
|
Driscoll, J. F.
- Title
- Planar Laser Induced Fluorescence Images of Supersonic Flame Structure.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
Michigan Univ., Ann Arbor
- Book or Conf
- Combustion Institute, 1st Joint Meeting of the U.S. Sections: Western States, Central States, Eastern States. Proceedings. March 14-17, 1999,
Washington, DC,
53-56 p.,
1999
- Keywords
-
combustion
|
fluorescence
|
flame structure
|
lasers
- Identifiers
- Planar Laser-Induced Fluorescence (PLIF)
- Abstract
- It is important to obtain images of the reaction zones within a supersonic flame in order to determine the nature of the flame structure. Most of the actual supersonic flames that have been considered for scramjet application have a lifted flame base, because some type of bluff body is used for flame stabilization. Struts and rearward facing steps have been used to produce a shielded, low speed region for the stabilization of the hydrogen-air flames of Barlow, et al, Chen, et., and Driscoll, et al. For the case of a jet injected transverse to a supersonic cross flow, the jet itself acts as a bluff body to product a low speed wake, where the flame stabilizers, as shown by Hasselbrink and ungal and Segal, et al. The liftoff height may be reduced significantly if the airflow has a high stagnation temperature, but in mostpractical situations some liftoff will still occur.