Experimental Study on Stable Combustion of Air Atomized Diesel in Porous Media

doi:10.16183/j.cnki.jsjtu.2023.256

Abstract

Abstract:

A porous media liquid combustion system based on air atomization fuel supply mode is developed to explore the combustion characteristics of liquid fuel in porous media. Long-term self-sustaining combustion and flame localization of diesel spray are successfully achieved by electric preheating ignition. The flame characteristics and temperature field of diesel spray combustion in spherical bed porous and medium are experimentally studied, and the effects of air flow and fuel injection on temperature distribution are discussed. The experimental results indicate that the electric preheating system has a good stability and repeatability, and the minimum preheating temperature required to maintain stable combustion is 719.2 ℃. Different flame forms are observed in the ignition stage and the stable combustion stage. The burner has a good temperature response performance, and the optimum equivalent ratio to achieve stable combustion of air atomized diesel oil should be between 0.63 and 0.84.

Key words: liquid fuel, air atomization mode, porous media, steady combustion

CLC Number:

TK16

LIU Hongsheng, LIANG Xiaoyan, XU Yichen, XIE Maozhao. Experimental Study on Stable Combustion of Air Atomized Diesel in Porous Media[J]. Journal of Shanghai Jiao Tong University, 2025, 59(5): 637-647.

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工况	Q_a/ (L·min^-1)	Q_f/ (mL·min^-1)	Ф	燃烧情况
着火工况	5	0.9	1.67	着火
1	7	0.55	0.72	燃烧
2	8	0.55	0.63	燃烧
3	9	0.55	0.57	熄灭
4	8	0.665	0.77	燃烧
5	6	0.665	1.03	燃烧
6	9	0.665	0.68	燃烧
7	11	1	0.84	燃烧
8	11	0.8	0.67	燃烧
9	11	0.65	0.55	熄灭
10	8	0.71	0.82	燃烧
11	11	0.92	0.77	燃烧
12	12	0.89	0.69	燃烧

热电偶测点	工况1	工况2	工况3	工况4
TC1	495.5	536.4	516.9	513.8
TC2	598.5	619.1	591.9	597.8
TC3	710.8	722.0	697.1	695.8
TC4	721.7	734.2	719.2	706.3
TC5	719.7	734.8	730.6	704.4