HCHO PLIF Investigation of the Flame Shape in an Unsteady Swirling Jet Flow

被引：1
|
作者：
Lobasov, A. S. [1 ,2 ]
Abdurakipov, S. S. [1 ,2 ]
Chikishev, L. M. [1 ,2 ]
Dulin, V. M. [1 ,2 ]
Markovich, D. M. [1 ,2 ]
机构：
[1] Russian Acad Sci, Kutateladze Inst Thermophys, Siberian Branch, Novosibirsk 630090, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
来源：
COMBUSTION EXPLOSION AND SHOCK WAVES | 2018年 / 54卷 / 06期
基金：
俄罗斯科学基金会;
关键词：
turbulent swirling flame; coherent structures; planar laser-induced fluorescence; formaldehyde fluorescence; principal component analysis; LASER-INDUCED FLUORESCENCE; COHERENT STRUCTURES; FORMALDEHYDE; AIR;
D O I：
10.1134/S0010508218060023
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper describes an experimental study of the spatial structure of the chemical reaction zone in turbulent swirling flames by planar laser-induced fluorescence of formaldehyde (HCHO). Combustion of the methane-air mixture at atmospheric pressure is considered for different values of the equivalence ratio phi: inverted cone flames for phi = 0.7 and 1.4 and lifted flames for phi = 2.5. Apart from small-scale deformations, the change in the chemical reaction zone shape is associated with two types of large-scale coherent structures, namely, an almost axisymmetric deformation mode, which appears to be due to the buoyancy effect on the combustion products, and rotation of an asymmetric mode due to the precession of the swirling flow.
引用
收藏
页码：642 / 648
页数：7
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