Structure and Stabilization of Thermal, Fluid-and Electrical Fields in High Speed Ionized Gases

高速电离气体中热场、流体场和电场的结构和稳定性

• 批准号: 62460090
• 负责人: KAYUKAWA Naoyuki
• 金额: $ 4.03万
• 依托单位: Faculty of Engineering, Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62460090/
• 关键词: magnetohydrodynamic plasma; turbulent structure; 3-D isotropic spectrum; 2-D isotropic spectrum; propagation of disturbance; 3-D turbulent equation analysis; 2次元2成分磁場配位; 弱電離プラズマ; 高速流れ; 乱流スペクトル; コルモゴロフスペクトル; 2次元乱流スペクトル; ゆらぎの非線形伝播; 3次元解析; 2次元2

Construction and preliminary testings have been made on a crossed laser beam correlation velocimeter and a modified light polarization line reversal system for high speed two-dimensional MHD turbulent boundary-layer temperature measurement. Using these and othermethods involving VxB probe, photodiodes, pressure transducers, generator segmented electrodes and the potential probes, the velocity, the temperature, the gas emission, the pressure, and the electrical signals from subsonic magnetohydrodynamic plasma have been collected in both a combustion and a shock tube systems under conditions each with and without the magnetic field.Analyses of the velocity data have shown that even in a short duration shock plasma a statistically steady state could be established. The Taylor's hypothesis for convective transport of disturbances has evidently confirmed by comparison of the velocity power spectra in the frequency space and that in the wave number space. It has been clearly demonstrated tha … More t the shock plasma has two different turbulent structures simulteneously, namaly a Kolmogorov's 3-D isotropic turbulence with the k^<-5/3> spectrum in a low wave number range and also the 2-D isotropic turbulence with the k^<-3> dependence in the successive higher wave number range. We could show that both turbulent structures were in a so-called inertial subrange, and the magnetic field played a central role for establishing the 2-D turbulent structure.Further, the time dependent 1-D nonlinear MHD equations were solved with disturbances given at the channel entrance. There have been shown two distinct propagation speeds, i.e., the convective and the convective plus sonic speeds. However, it was also made clear that which disturbances could dominate, was decided by the upstream fluctuation processes.Finally, we performed a three dimensional MHD channel flow analysis with a k-epsilon turbulence model and showed that some serious fluiddynamical instabilities could be well suppressed under the magnetic field with a two-component 2-D configuration. Less

本文报道了用于高速二维MHD湍流边界层温度测量的交叉激光束相关测速仪和改进的光偏振线反转系统的研制和初步试验。使用这些方法和其他方法，包括CO2 B探头，光电二极管，压力传感器，发生器分段电极和电位探头，速度，温度，气体排放，压力，在有磁场和无磁场条件下，在燃烧和激波管系统中收集了亚音速磁流体动力学等离子体的电信号，对速度数据的分析表明，即使在一个短时间冲击等离子体可以建立统计稳定状态。通过对频率空间和波数空间的速度功率谱的比较，明显地证实了扰动对流输送的泰勒假设。事实清楚地表明， ...更多信息 激波等离子体同时具有两种不同的湍流结构，即在低波数范围内具有k^&lt;-5/3&gt;谱的Kolmogorov三维各向同性湍流和在高波数范围内具有k^依赖性的二维各向同性湍流<-3>。结果表明，两种湍流结构都处于惯性子区，磁场对二维湍流结构的建立起了重要作用，并进一步求解了在通道入口处施加扰动的一维非线性MHD方程。已经示出了两种不同的传播速度，即，对流和对流加音速。最后，我们用k-ε湍流模型对三维MHD槽道流进行了分析，结果表明，在磁场作用下，一些严重的流体动力学不稳定性可以用两个分量的2-D结构得到很好的抑制。少

项目成果

Shuniti Oikawa: Proceedings of The First KSMEーJSME Thermal and Fluids ENgineering Conference. 2. 247-252 (1988)

Shuniti Oikawa：第一届 KSME-JSME 热与流体工程会议论文集 2. 247-252 (1988)。

Naoyuki Kayukawa: "A Compact Magnetohydrodynamic System with Strong Fluid-Magnetic Field Interaction" Proceedings of The First KSME-JSME Thermal and Fluid Engineering Conference. 2. 241-246 (1988)

Naoyuki Kayukawa：“具有强流体磁场相互作用的紧凑磁流体动力系统”第一届 KSME-JSME 热与流体工程会议论文集。

Yoshiaki Aoki: Proceedings of The First World Conference on Experimental Heat Transfer,Fluid Mechanics and Thermodynamics. 773-775 (1988)

青木义明：第一届世界实验传热、流体力学和热力学会议论文集。

及川俊一: 電気学会・新省エネルギー研究会資料. ESCー88ー26. 19-28 (1988)

Shunichi Oikawa：日本电气工程师学会/新能源节约研究小组的材料。ESC-88-26（1988）。

沖中憲之: 電気学会新・省エネルギー研究会資料. ESC-88-26. 1-10 (1988)

Noriyuki Okinaka：IEEJ 新能源节约研究组材料 ESC-88-26 (1988)。