Research on the Interaction of the Turbulent Free Shear Layer with Walls.

湍流自由剪切层与壁面相互作用的研究。

• 批准号: 62420022
• 负责人: SATO Junzo
• 金额: $ 6.21万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62420022/
• 关键词: Separated Flow; Free Shear Layer; Separation Bubble; Reattachment of Separation; Turbulence Structure

This research project was made to get the two-point space correlation of turbulent velocity fluctuations within the reattaching process of the free shear layers to the adjacent walls by using two Laser-Doppler Velocimeters. The initial schedule was changed several times because of the ongoing repair work of the laboratory building. Summarizing the results;1. The measuring method of the two-point space correlation using two Laser Doppler Velocimeters simultaneously is presented. (1) The effect of minor disagreement of the clock frequencies of two LDV systems is studied and the error introduced by this incomplete synchronization has been reduced by using multiple sampling technique. (2) The real time processing of the sampled data has been realized through use of the DMA transfer and machine language written filtering programs. (3) The data sampling system using two computers with two Laser Doppler Velocimeters simultaneously is completed.2. Two-point space correlation of the velocity fluctuations within the turbulent shear layer of the long bubble formed on the leading edge of a flat plate is measured. The influence of the propagation of low frequency fluctuations observed within the leading edge region of the long bubble is quantitatively obtained.

本文利用两台激光多普勒测速仪对自由剪切层与壁面再附着过程中湍流速度脉动的两点空间相关性进行了研究。由于实验室大楼正在进行维修工作，最初的时间表几经改变。总结结果;1。提出了用两台激光多普勒测速仪同时测量两点空间相关的方法。(1)研究了两个LDV系统时钟频率微小不一致的影响，并采用多重采样技术减小了这种不完全同步带来的误差。(2)采用DMA传输和机器语言编写滤波程序，实现了采样数据的真实的实时处理。(3)完成了两台计算机同时使用两台激光多普勒测速仪的数据采集系统.本文测量了平板前缘长气泡湍流剪切层内速度脉动的两点空间关联。定量地得到了在长气泡前缘区域内观察到的低频波动传播的影响。

项目成果

RINOIE, Kenichi SATO, Junzo: "Experimental Observation of Transitional Processes in the Laminar Separation Bubbles on Airfoil Sections." Journal of the Japan Society for Aeronautical and Space Sciences, Vol.38, 1990.

RINOIE、Kenichi SATO、Junzo：“机翼截面层流分离气泡过渡过程的实验观察”。

李家賢一,佐藤淳造: "翼型上に生ずる層流剥離泡内部の遷移過程についての実験" 日本航空宇宙学会誌. 38. (1990)

Kenichi Lee、Junzo Sato：“机翼上发生的层流分离气泡内的转变过程的实验”日本航空学会杂志 38。（1990）。

辰己薫: 航空宇宙における流体力学とその研究課題』・『飛行体まわりの剥離流の解析』シンポジウム論文集. (1988)

辰巳薰：“航空航天流体动力学及其研究问题”和“飞机周围分离流分析”研讨会论文集（1988）

李家賢一,新郷美可,佐藤淳造: "NACA 63-009 翼型上に生ずるShort BubbleとLong Bubbleの測定" 日本航空宇宙学会誌. 38. (1990)

Kenichi Lee、Mika Shingo、Junzo Sato：“NACA 63-009 机翼上产生的短气泡和长气泡的测量”日本航空学会杂志 38。（1990 年）。

RINOIE, Kenich: "One-Equation Turbulence Model for the Laminar Separation Bubble on Airfoils." Transactions of the Japan Society for Aeronautical and Space Sciences. Vol.32. 1-12 (1989)

RINOIE, Kenich：“机翼层流分离气泡的一方程湍流模型。”