高压下湍流火焰速度测量与拟合

发布时间：2018-05-03 01:25

本文选题：预混湍流火焰 + 湍流火焰速度　；参考：《工程热物理学报》2016年04期

【摘要】：利用连续燃烧本生灯结合OH-PLIF火焰结构激光诊断技术获得了高压下预混湍流火焰瞬时前锋面图像,通过图像处理,得到了高压下多种混合气的湍流火焰速度及其拟合关系式。结果表明:高压预混湍流火焰前锋面为高度褶皱凹凸结构,现象上表现为大尺度的凸向未燃气的凸结构和小尺度的凸向已燃气的凹结构。合成气火焰比CH_4/air更加褶皱,前锋面更加精细。本文所有实验点高压湍流火焰速度可以拟合为S_T/S_L与[(P/P_0)(u′/S_L)]~n的形式,n约为0.4左右,表明湍流涡与火焰面的相互作用遵循自相似的规律。
[Abstract]:The instantaneous front surface image of premixed turbulent flame under high pressure was obtained by using continuous combustion Benson lamp and OH-PLIF flame structure laser diagnosis technique. By image processing, the turbulent flame velocity and its fitting relation were obtained under high pressure. The results show that the front surface of high pressure premixed turbulent flame is a highly folded concave structure, which is characterized by a large scale convexity structure and a small scale concave structure. The syngas flame is more wrinkled than CH_4/air, and the front surface is finer. In this paper, the velocity of high pressure turbulent flame at all experimental points can be fitted to the form of S_T/S_L and [P / P / P _ 0 / S / L] n about 0. 4, which indicates that the interaction between turbulent vortex and flame surface follows the self-similar law.
【作者单位】：西安交通大学动力工程多相流国家重点实验室;
【基金】：国家自然科学基金(No.51376004) 激光与物质相互作用国家重点实验室开放课题(No.SKLLIM1508) 高等学校博士学科点专项科研基金(No.20130201130011)
【分类号】：TK16

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