The premixed flame in a counterflow

✍ Scribed by J. Buckmaster; D. Mikolaitis

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 639 KB
• Volume: 47
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(82)90100-6

✦ Synopsis

We examine a premixed flame located in a counterflow of fresh cold mixture and hot burnt gas, the latter at a temperature close to that of adiabatic deflagration. A constant density, high activation energy model is adopted, and the steady state response depends essentially on two parameters, the Lewis number, and the temperature of the remote hot gas. If the second is sufficiently small, the response of flame position to changes in straining rate is a variation on the familiar S-shaped response for systems that display ignition and extinction. The possible implications for a flammability-limit model are discussed. The stability of the steady state under the influence of one~limensional disturbances is examined in detail, using the numerical method of weighted residuals.