Investigation of Detonation Initiation by Obstacle Plates Parallel to Flow for Pulse Detonation Engines

脉冲爆震发动机平行于气流的障碍板引发爆震的研究

• 批准号: 18560759
• 负责人: ENDO Takuma
• 金额: $ 2.44万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560759/
• 关键词: Internal Combustion Eneine; Detonation; Initiation; Obstacle; エンジン; 矩形管

The final objective of the research is to develop a new combustor for a pulse detonation engine where we can use air as the oxidizer and easily make the operation frequency high For the objective, we carried out fundamental studios on a combustor whom cross section was a rectangle. The initiation method of detonations is basically obstacle type. However, the obstacles are several plates parallel to the flow direction of the combustor m that the flow resistance of the obstacles is small during the burned-gas-exhaust phase and the gas-recharge phase.In the research, we mainly optimized the shape and configuration of the obstacle plates. Especially, the generation and propagation of shack waves and the acceleration of flames were investigated in detail with many pressure transducers and ion probes. In the experiments, we used hydrogen-oxygen-argon gas mixtures and hydrogen-air gas mixture, where the equivalence ratio was kept unity. It was found that the intense acceleration of flames and subsequent deflagration-to-detonation transition occurred in the vicinity of the side wall of the combustor. The separation distance and cross-sectional shape of the obstacle plates were hind to have significant influences on the deflagration-to-detonation transition process After some optimization of the obstacle-plate conditions, we successfully initiated detonations in the hydrogen-air gas mixture.

本研究的最终目标是开发一种新型的脉冲爆震发动机燃烧室，可以使用空气作为氧化剂，并且可以轻松提高运行频率。为此，我们对横截面为矩形的燃烧室进行了基础研究。爆炸的起爆方式基本上是障碍物式。然而，障碍物是与燃烧室流动方向平行的多块板，在燃气排出阶段和补气阶段，障碍物的流动阻力较小。在研究中，我们主要对障碍板的形状和配置进行了优化。特别是，利用许多压力传感器和离子探针详细研究了冲击波的产生和传播以及火焰的加速。在实验中，我们使用氢气-氧气-氩气混合物和氢气-空气混合气，其中当量比保持一致。研究发现，火焰的强烈加速和随后的爆燃到爆震的转变发生在燃烧室侧壁附近。障碍板的间隔距离和横截面形状对爆燃到爆轰的转变过程有显着影响。经过对障碍板条件的一些优化，我们成功地在氢气-空气混合气体中引发爆炸。

项目成果

管軸に平行な障害板列がデトネーションの起爆に与える影響

平行于管轴的障碍板阵列对起爆的影响

• 发表时间: 2007
• 作者: YUKAFUKUSHIMA;JUNYAKOBAYASHI;西村弘和;榮 総一郎
• 通讯作者: 榮 総一郎

The Influences of Obstacle Plates Parallel to the Combustor Axis on Detonation Initiation

平行于燃烧室轴线的障碍板对起爆的影响

• 发表时间: 2007
• 作者: Soichiro;Sakae
• 通讯作者: Sakae

流れに平行な障害板によるデトネーションの発生

由于与流动平行的障碍板而发生爆炸

• 发表时间: 2007
• 期刊: 平成18年度 衝撃波シンポジウム 講演論文集
• 作者: YUKAFUKUSHIMA;JUNYAKOBAYASHI;西村弘和
• 通讯作者: 西村弘和

Detonation Initiation by Obstacle Plates Parallel to Flow

由与流动平行的障碍板引发爆炸

• 发表时间: 2007
• 作者: Hirokazu;Nishimura
• 通讯作者: Nishimura