The effect of electrohydrodynamic boundary layers on heat transfer from flame gases

✍ Scribed by R.M. Clements; P.R. Smy

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 553 KB
• Volume: 29
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(77)90091-8

✦ Synopsis

The effects of dc electric fields on the heat transfer to a cylindrical calorimeter totally immersed in a seeded propane-air flame are investigated. Because of the enhanced ionization, the calorimeter, when biased negatively, is shown to behave as a cylindrical Langmuir probe in a plasma, with large electric fields only in the immediate vicinity of the calorimeter. The increase in heat transfer is strictly a boundary layer phenomenon; it reaches a maximum of about 10% at the highest attainable density (~1018/m 3) and shows good agreement with a simple theory based on sheath-modified flow.