Study of Compound Choking Phenomena and Compound Shock Waves in Compressible Internal Flows

可压缩内流复合窒息现象与复合冲击波研究

• 批准号: 17360083
• 负责人: MATSUO Kazuyasu
• 金额: $ 9.48万
• 依托单位: The University of Kitakyushu
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360083/
• 关键词: Compressible Fluid; Supersonic Flow; Shock Wave; Compound choking; Compound Flow

1. The compound choking by confluence of two subsonic and parallel streams through a converging nozzle was experimentally investigated for various ratios of the upstream stagnation pressure to the back pressure. The critical pressure ratio across the converging nozzle when the compound choking occurs at the nozzle exit was obtained for various nozzles. Also, the critical pressure ratio of the compound choking was calculated where the mixing of the two streams is taken into consideration. The calculated results agree well with the present experimental results.2. The behavior of two subsonic streams through a single converging nozzle was numerically analyzed from the viewpoint of the choking of the compound nozzle flow. A new criterion of the compound choking was presented taking the growth of the sonic line extending across the entire exit passage into consideration. The present criterion was compared and discussed with the criterion of the previous flow model.3. Even when the compound flow of two subsonic and parallel streams through a converging nozzle is choked, the flow condition near the exit of the nozzle changes if the back pressure is reduced. This means that the compound choking is not established at the nozzle exit just as the one-dimensional isentropic theory assumes, but the compound choking occurs near a finite region near the exit.4. The pressure wave propagating against two parallel subsonic streams in a constant area straight duct was investigated by both one-dimensional analysis and experiment. From these studies, the characteristics of compound sound waves were made clear. The pressure wave propagating against the streams is bifurcated and the shape is three dimensional, but the propagation velocity is nearly equal to the value by the previous one dimensional flow model.

1。通过汇合通过收敛喷嘴的汇合而窒息的化合物，以实验研究上游停滞压力与背压的各种比率。对于各种喷嘴，在喷嘴出口处发生化合物窒息时，整个排气喷嘴的临界压力比。同样，计算化合物窒息的临界压力比，考虑到两个流的混合。计算结果与当前的实验结果非常吻合2。通过单个收敛喷嘴的两个亚音速流的行为从复合喷嘴流的窒息的角度进行了数值分析。考虑到整个出口通道的声音线的增长，提出了复合窒息的新标准。比较了本标准并与先前流量模型的标准进行了讨论。3。即使将两个亚音速和平行流的化合物流通过收敛喷嘴的流动被cho住，如果降低了反向压力，喷嘴出口附近的流量也会改变。这意味着在喷嘴出口时没有建立复合窒息，就像一维等体理论所假设的那样，但是复合的窒息发生在出口附近的有限区域附近。4。通过一维分析和实验研究了在恒定区域直管中在恒定区域直管中传播的压力波。从这些研究中，使复合声波的特征清晰清晰。在溪流上传播的压力波是分叉的，形状为三维，但是传播速度几乎等于上一个维流模型的值。

项目成果

先細ノズル流れのチョークに及ぼす境界層の影響に関する実験

边界层对锥形喷嘴流阻影响的实验

• 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: I. Hosako;et. al.;宮里 義昭;Yutaka Kadoya;近藤陽介
• 通讯作者: 近藤陽介

Propagation of weak pressure waves against two parallel subsonic streams

• DOI: 10.1007/s11630-006-0135-2
• 发表时间: 2006-06
• 期刊: Journal of Thermal Science
• 影响因子: 2.5
• 作者: Makiko Yonamine;Takanori Ushijima;Y. Miyazato;M. Masuda;H. Katanoda;K. Matsuo

Numerical Study of Compound Choking of Two Subsonic Streams

两种亚音速流复合扼流的数值研究

• 发表时间: 2006
• 期刊: Proc.of Asian Joint Workshop on Thermo-physics and Fluid Science
• 作者: I. Hosako;et. al.;Makiko Yonamine
• 通讯作者: Makiko Yonamine

二つの亜音速流れの合流による複合チョークに関する数値解析

两个亚音速流汇合引起的复合扼流圈的数值分析

• 发表时间: 2006
• 期刊: 日本機械学会論文集 B編 72巻
• 作者: H. Yasuda;他;与那嶺 牧子
• 通讯作者: 与那嶺 牧子

先細ノズル流れのチョークに関する実験

锥形喷嘴流阻实验

• 发表时间: 2007
• 作者: Yoshiaki;Miyazato;et. al.;宮里 義昭
• 通讯作者: 宮里 義昭