Interaction of a Plane Flame Front with the Wake of a Cylinder.
Abstract
A Rayleigh scattering and laser Doppler velocimetry system has been developed for studying the interaction between the vortex street behind a cylinder and a two dimensional plane flame front. Measurements on an open jet methane/air flame stabilized on a heated 0.25 mm platinum wire showed appreciable instabilities in the flame due to the turbulent eddies in the mixing region of the jet. By enclosing the flow in a square channel flame stability was increased. A 3.2 mm diameter cylinder was used to generate a Karman vortex street at a frequency of 22 Hz. Measurements indicated that the flame motion in the wake is small compared to the scale of vortices shed by the cylinder. Furthermore, the flame upstream of the wake region also fluctuated which would indicate that as a protion of the flame fluctuates, it perturbs the entire flow field upstream.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1977
- Accession Number
- ADA060401
Entities
People
- F. Robben
- I. Namer
- R. K. Cheng
- R. Schefer
- Y. Agrawal
Organizations
- University of California, Berkeley