Plasma Jet Flame-Stabilization Mechanism in Supersonic Combustion

超音速燃烧中的等离子射流稳焰机制

• 批准号: 03650057
• 负责人: KIMURA Itsuro
• 金额: $ 1.34万
• 依托单位: Tokai University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650057/
• 关键词: Plasma Jet; Ignition; Flame Stabilization; Supersonic Combustion; 火災安定化

Studies on the mechanism of ignition and flame-holding by upstream injection plasma jets were conducted for H_2 diffusion flames in high speed air streams. The plasma jets were operated with Ar gas involving active species such as O_2, N_2 and H_2, in the range of relatively low power. It was observed that for ignition and flame-holding, the concentration of active species in feedstock is more important than plasma jet power. This fact suggests the effectiveness of active species produced by plasma jets, rather than that of plasma-jet thermal energy, and also the importance of radical concentration supplied to the ignition-point of a fuel jet, compared to the total quantity of radicals produced. It was also found that the effectiveness of additives is in the order, O_2 * N_2 > H_2, and the results of numerical simulation on combustion-reaction promotion by the radicals added agreed qualitatively with the experimental ones. In the case of supersonic air streams, where an oblique shock wave is observed ahead of plasma jet injection, for the establishment of ignition and flame-holding the power of plasma jet must be increased, but the order of effectiveness of plasma jets, differ in the feedstock, are same in the case of subsonic air strems.

本文对高速气流中氢气扩散火焰上游喷射等离子体射流的点火和火焰稳定机理进行了研究。等离子体射流在相对低的功率范围内以Ar气操作，包括活性物种如O_2、N_2和H_2。结果表明，对于点火和火焰稳定，原料中活性物种的浓度比等离子体射流功率更重要。这一事实表明，由等离子体射流产生的活性物质的有效性，而不是等离子体射流热能的有效性，以及与所产生的自由基的总量相比，供应到燃料射流的燃点的自由基浓度的重要性。添加剂的促进效果顺序为O_2 * N_2 > H_2，数值模拟结果与实验结果定性一致。在超音速空气流的情况下，在等离子体射流注入之前观察到斜激波，为了建立点火和火焰稳定，必须增加等离子体射流的功率，但是等离子体射流的有效性顺序，在原料中不同，在亚音速空气流的情况下是相同的。

项目成果

Sato,Y., Kimura,I., etal: "Effectiveness of plasma Torchs for Ignition and flameholding in Scramjet." J.Propulsion and Power. Vol.8. 883-889 (1992)

Sato,Y.、Kimura,I. 等人：“等离子炬在超燃冲压发动机中的点火和稳焰效果。”

Horisawa,H., Kimura,I.and Sayama,M.: "Studies on the Mechanism of Ignition and Flameholding by Plasma Jets." J.Aerospace Soc.Japan. Vol.40, No.460. 285-294 (1992)

Horisawa,H.、Kimura,I. 和 Sayama,M.：“等离子射流点火和火焰保持机制的研究”。

堀沢 秀之: "フレームトーチ・イグナイタの性能向上に関する研究" 東海大学紀要(工学部). 32. (1992)

堀泽英行：“提高火焰炬和点火器性能的研究”东海大学学报（工学院）32。（1992）。