Plasma-Assisted Ignition in the Flow-Through Combustion Chamber
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 wel...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Academy of Sciences of Moldova
2019-12-01
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| Series: | Problems of the Regional Energetics |
| Subjects: | |
| Online Access: | http://journal.ie.asm.md/assets/files/06_03_44_2019.pdf |
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| Summary: | 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 η 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 λ = 12.3 cm with a microwave beam power of P = 1 kW and a microwave pulse duration of τ = 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. |
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| ISSN: | 1857-0070 |