A Development of a Two-component Velocity Profiler using an Advanced-Multi-Point LDV Technique and a Particle Image Technique

使用先进多点 LDV 技术和粒子图像技术开发双分量速度剖面仪

基本信息

项目摘要

The summary of this study for three years from 2000 to 2002 is as follows.A novel method to measure two-component velocity profile simultaneously was developed by using the combined system of a CCD area image sensor (CAIS) and a multi-point LDV. The benefits of this method are shown by pursuing the compact and convenient over the system. The results of some measurements such as the flow field behind the cylinder shows the reliability of the measurement for turbulence field. The basics techniques of this method are established and the applicability for the measurement of flow field is shown.Many experiments have been performed to study the flow structure around the reattachment region of a two-dimensional backward facing step. This flow field has a large-scale vortex structure with low-frequency fluctuation involving one of instantaneous reattachment point. To clarify these structures time series velocity profile is measured using an advanced multi-point LDV system and behavior of separated shear layer and reattachment phenomena is visualized clearly. A velocity at the vicinity of the step wall increases rapidly when the separated shear layer reached to the step wall passes the measuring region. A frequency of this event is in good agreement with the one of the flapping of the separated shear layer. There are two patterns of when the velocity direction changes from positive to negative on the step wall around a reattachment region.
本文对2000 ~ 2002年三年的研究工作进行了总结,提出了一种利用CCD面阵图像传感器(CAIS)和多点激光测速仪(LDV)相结合的方法来同时测量二维速度剖面。这种方法的优点体现在追求系统的紧凑和方便。通过对圆柱后流场的测量,验证了湍流场测量的可靠性。建立了该方法的基本技术,并证明了该方法在流场测量中的适用性。对二维后向台阶再附着区的流动结构进行了实验研究。该流场具有低频脉动的大尺度涡结构,其中包含一个瞬时再附点。为了阐明这些结构,使用先进的多点LDV系统测量了时间序列速度剖面,并清楚地显示了分离剪切层和再附着现象的行为。当到达台阶壁的分离剪切层通过测量区域时,台阶壁附近的速度迅速增加。该事件的频率与分离剪切层的拍动频率一致。在再附着区附近的台阶壁上,速度方向由正向负变化时有两种模式。

项目成果

期刊论文数量(12)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Furuichi, N., Hachiga, and Kumada, M.: "A Flow Characteristic at the Reattachment Region of a Two-Diraensional Backward-Facing Step Flow (in Japanese)"Trans. JSME. Vol. 69, No. 677. 25-30 (2003)
Furuichi, N.、Hachiga 和 Kumada, M.:“二维向后台阶流的再附着区域的流动特性(日语)”Trans。
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N.Furuichi, T.Hachiga, K.Hishida, M.Kumada: "Development of a Two-dimensional Velocity Profiler using a Fiber Multi-Point LDV and a CCD Area Image Sensor"SICE 2002 in Osaka. 2199-2204 (2002)
N.Furuichi、T.Hachiga、K.Hishida、M.Kumada:“使用光纤多点 LDV 和 CCD 区域图像传感器开发二维速度剖面仪”SICE 2002,大阪。
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Furuichi, N., T.Hachiga, K.Hishida, M.Kumada: "A Flow Structure at Reattachment Region of a Two-Dimensional Backward-Facing Step by Using Advanced Multi-Point LDV"Laser Techniques Applied to Fluid Mechanics (Springer-Verlag). 143-156 (2000)
Furuichi, N.、T.Hachiga、K.Hishida、M.Kumada:“使用先进多点 LDV 实现二维后向台阶重新附着区域的流动结构”应用于流体力学的激光技术(Springer-
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古市紀之, 八賀正司, 菱田公一, 熊田雅弥: "多点同時測定LDVとCCDエリアイメージセンサを併用した2成分流速分布同時測定法の開発"計測自動制御学会論文集. 39-3. 218-224 (2003)
Noriyuki Furuichi、Masashi Yaga、Koichi Hishida、Masaya Kumada:“使用多点同时测​​量 LDV 和 CCD 面阵图像传感器开发两分量流速分布的同时测量方法”,仪器与控制工程师学会会刊,39- 3. 218-224 (2003)
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Furuichi, N., Hachiga, T., Hishida, K., and Kumada, M.: "A Development of a Two-component Velocity Profiler using a Multi-Point LDV and a CCD Area Image Sensor"Transactions of the Society of Instrument and Control Engineers. Vol.39 No.3. 218-224 (2003)
Furuichi, N.、Hachiga, T.、Hishida, K. 和 Kumada, M.:“使用多点 LDV 和 CCD 区域图像传感器开发两分量速度剖面仪”Transactions of the Society of Instrument
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HACHIGA Tadashi其他文献

HACHIGA Tadashi的其他文献

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{{ truncateString('HACHIGA Tadashi', 18)}}的其他基金

Distinguish malignant melanomas and benign nevi based on the blood flow velocity of new blood vessels in tumor with blood flow velocity 3D images
根据血流速度3D图像肿瘤内新生血管的血流速度区分恶性黑色素瘤和良性痣
  • 批准号:
    23650279
  • 财政年份:
    2011
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Development of a New Cancer Diagnostic and Treatment Device by 3-D Imaging Techniques for Microvessels Using a Laser
利用激光微血管 3D 成像技术开发新型癌症诊断和治疗设备
  • 批准号:
    20200015
  • 财政年份:
    2008
  • 资助金额:
    $ 2.3万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
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