A Study of turbulent flame structure and extinction mechanism by laser diagnostics

2014 Fiscal Year Final Research Report

• Project/Area Number: 23560223
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Nagoya University
• Principal Investigator: YAMAMOTO Kazuhiro 名古屋大学, 工学(系)研究科(研究院), 准教授 (60283488)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 乱流火炎 / レーザ計測 / 消炎 / 火炎構造

Outline of Final Research Achievements

In this study, we have examined local flame structure by joint PLIF imaging. By considering the degree of flame wrinkling, three-dimensional flame surface area is obtained from 2D images. We have used a cyclone-jet combustor to establish turbulent premixed flames for propane/air mixtures in a wide range of turbulence, covering the flamelet regime and thin reaction zones regime on combustion diagram. Results show that as the mean velocity at the combustor exit is increased, more complex flame structure is observed with multiple flamelets. Near the global extinction, the large reduction of heat release rate occurs, resulting in local extinction.

Free Research Field

燃焼工学