Investigations of Heat Release, Extinction, and time Evolution of the Flame Surface, for a Nonpremixed flame Interacting with a Vortex

摘要

Flame/vortex interactions to a great extent govern turbulent combustion. Flame roll-up due to vortices is also one of the most important phenomena driving combustion instabilities. An experimental investigation analyzes some fundamental features of a diffusion flame interacting with a vortex ring. A steady nonpremixed counterflow flame of air and hydrogen diluted with nitrogen is first established. A vortex ring is generated from a tube installed in the lower combustor nozzle and impinges on the flame.