管状火炎の構造 : 第1報,回転伸長流中に形成される希薄メタン-空気混合気火炎の構造

Structures of Tubular Flames : 1st Report, Structures of the Tubular Flames of Lean Methane/Air Mixtures in a Rotating Stretched-Flow Field

Sakai Yukio

Ishizuka Satoru

日本機械学會論文集. B編

The tulular flames of lean methane/air mixtures in a rotating-flow field have been analyzed for their concentrations of stable species and temperature distributions, and their structures have been investigated. The results show that the tubular flame consists of an inner hot gas core of burned gas and an outer region of the unburned mixture, and that the flame structure is essentially the same as that of the one-dimensional, flat, premixed flame. As the extinction limit is approached, the flame diameter decreases and the concentrations of carbon monoxide and hydrogen behind the flame zone increase. Hence, the extinction of the tubular flame of lean methane/air mixtures is caused by incomplete combustion with stretch as it is with other stretched flames. As the density inside the flame is lower than that outside, the flame front is rendered smooth and cylindrical by the rotational motion of the flow.

Combustion

Premixed Combustion

Tubular Flame

Flame Structure

Lean Mixture

Stretch

Rotating Flow Field

Technology. Engineering [ 500 ]

jpn

一般社団法人日本機械学会

社団法人日本機械学会

本文データは学協会の許諾に基づきCiNiiから複製したものである

[ISSN] 0387-5016

[NCID] AN00187441

[NAID] 110002402183 isVersionOf