Idealized Two Dimensional Flames in Premixed Systems

Abstract

Idealized, two dimensional combustion is considered in terms of irrotational, premixed gases upstream of a discontinuous flame which propagates with a constant specified velocity and results in a specified decrease in density. The flame is anchored by a small flame-holder which is located on the lower wall and which plays an essential role in determining the flow. With heat release the flow downstream of the flame is rotational and involves a stagnation region adjacent to the upper wall. Numerical solutions are obtained for a range of propagation speeds down lo roughly 0.70 of the velocity of the approaching stream and for several density jumps including the zero heat release case. In this latter case the assumed influence of the flame holder results in flow nonuniformity.

Key Words:

• Premixed flames