Inflow Characterization for Marine and Hydrokinetic Energy Devices. FY-2010 Annual Progress Report
Inflow Characterization for Marine and Hydrokinetic Energy Devices. FY-2010 Annual Progress Report
复制标题
海洋和流体动力能源装置的流入特性。
DOI：
10.2172/1004808
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发表时间：
2011
影响因子：
2.6
通讯作者：
B. Polagye
中科院分区：
文献类型：
--
作者：
M. Richmond;V. Durgesh;J. Thomson;B. Polagye
海洋和水力动力装置（MHK）作为可再生能源正在被广泛研究。Marrowstone岛是安装MHK装置的潜在地点，因为观测到的潮流足以发电。为了量化湍流对MHK装置和该场地周围环境的影响，太平洋西北国家实验室（PNNL）与华盛顿大学应用物理实验室（APL-UW）合作，在此进行了初步的流体流场研究。这项研究需要连续的声学多普勒流速仪（ADV），声学多普勒海流剖面仪（ADCP）和电导率，温度和深度（CTD）的测量，从2010年5月4日至2010年5月22日，以获得有关湍流的影响，在不同的潮汐条件下的信息。使用华盛顿大学（APL-UW）提供的R/V Jack Robertson在Marrowstone研究中心部署用于收集上述测量值的仪器。所有测量都是在平均深度为海面以下22米的地点进行的。ADV以32 Hz的采样频率在海床以上4.6 m处获得速度数据，ADCP以2 Hz的采样频率获得从海床以上2.6 m高度到表面的速度剖面数据，面元分辨率为0.5 m。ADV和ADCP测量表明，水平流速的湍流强度为10%。此外，ADV测量的频谱分析表明，在频谱的惯性子范围内，流动是完全湍流的，斜率为-5/3。此外，时间频率分析表明，在高频率的“漩涡”的存在。这些初步研究提供了初始流场和现场特征，显示了所用仪器的局限性，并强调了在2011财年研究中部署实验装置时需要做出的改变。
Marine and Hydro Kinetic devices (MHK) are being widely studied as a source of renewable energy. The Marrowstone Island site is a potential location for installing MHK devices because the tidal currents observed that are sufficient for power generation. In order to quantify the effects of turbulence on MHK devices and the surrounding environment at this site, a prelimi- nary fluid flow field study was conducted here by the Pacific Northwest National Lab (PNNL) in collaboration with the Applied Physics Lab at the University of Washington (APL-UW). This study entailed continuous The Acoustic Doppler Velocimetry (ADV), Acoustic Doppler Current Profiler (ADCP) and Conductivity, Temperature and Depth (CTD) measurements from May 4, 2010 to May 22, 2010, in order to obtain information about turbulence effects during different tidal conditions. The instruments used for collecting the above measurements were deployed at the Marrowstone site using a R/V Jack Robertson provided by the University of Washington (APL-UW). All the measurements were taken at the site with an average depth of 22 m below the sea surface. ADV acquired velocity data at 32 Hz sampling frequency at 4.6 m above the seabed, and ADCP acquired velocity profile data at a sampling frequency of 2 Hz, from a height of 2.6 m above the seabed to the surface with a bin resolution of 0.5 m. The ADV and ADCP measurements showed that the horizontal velocity had a turbulence intensity of 10%. Further- more, the spectral analysis from ADV measurements showed that the flow is fully turbulent with -5/3 slope in the inertial sub-range of the spectra. Moreover, the temporal-frequency analysis showed presence of ”eddies” at high frequencies. These preliminary studies provided initial flow field and site characteristics, showed the limitations of the instruments used and highlighted changes that need to be made in the experimental setup for deployment in FY-2011 studies.