Plasma-Assisted Ignition in the Flow-Through Combustion Chamber

被引:2
作者
Esakov, I. I. [1 ]
Ravaev, A. A. [1 ]
Grachev, L. P. [1 ]
Volobuev, I. A. [2 ]
机构
[1] Russian Acad Sci, Moscow Radiotech Inst, Moscow, Russia
[2] St Petersburg Natl Res Univ Informat Technol Mech, ITMO Univ, St Petersburg, Russia
来源
PROBLEMELE ENERGETICII REGIONALE | 2019年 / 03期
关键词
combustion chamber; detonation engine; constant volume combustion; plasma - associated combustion; supersonic flow combustion; microwave discharge; streamer discharge; nonequilibrium plasma;
D O I
10.5281/zenodo.3562187
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The work is aimed to the problem of the organization of combustion in a high-speed flow of a fuel mixture using subcritical streamer microwave discharges. The problem is relevant for engines using combustion at a constant volume, in high-speed subsonic and supersonic flow of the fuel mixture, as well as in detonation engines with forced ignition. The goal is to investigate the possibility of igniting of a series of attached subcritical microwave discharges located at some distance from each other in a high-speed stream near metal or dielectric screen, and also to investigate the ability of these discharges to ignite a fuel mixture. This goal is achieved by the fact that numerical calculations of microwave discharges near the screen are performed at a flow velocity of 5 m / s to 500 m / s. Then, the calculations are repeated for the fuel mixture with a fuel excess ratio eta from 0.55 to 1.5. The results of calculations of a mixture of propane with air are compared with experiments that were carried out on an apparatus with a wavelength of lambda = 12.3 cm with a microwave beam power of P = 1 kW and a microwave pulse duration of tau = 0.2 sec. The significant result is that the deeply critical discharge connected to the resonator on the dielectric screen is not blown away by the high-speed flow and ignites the mixture. Importance - a microwave discharges ignite fuel over the entire speed range. The calculation results are confirmed by experiment.
引用
收藏
页码:65 / 78
页数:14
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