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首页> 外文会议>OCEANS 2010 >Observations of turbulent flow fields in the Chesapeake Bay estuary for tidal energy conversion
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Observations of turbulent flow fields in the Chesapeake Bay estuary for tidal energy conversion

机译：切萨皮克湾河口湍流场用于潮汐能转换的观测

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This paper presents preliminary results from a two-week long set of field experiments performed to characterize flow structure and turbulence in the mid-water column during tidal flows in the Chesapeake Bay estuary. At the deployment location, in the vicinity of Kent Island peak flood/ebb tidal flows range from +/− 40 cm/s in the along-channel direction and secondary flow in the cross-channel direction reaches peak of +/−10 cm/s during the slack parts of a tidal cycle. Conditionally sampled mean velocity profiles indicate asymmetry in the flood/ebb tidal flows, which is attributed to the tidal straining. Temporal velocity spectra are presented and show modifications of the turbulence spectra due to presence of surface gravity wave field. Time history of turbulent kinetic energy dissipation rate shows variations on a tidal time scale with magnitudes ranging from 10−6 to 10−3 m2/s3. Results are discussed in the context of tidal turbine design and performance.
机译：本文介绍了为期两周的一组野外实验的初步结果，这些实验用于表征切萨皮克湾河口潮流期间中水柱中的水流结构和湍流。在部署地点，在肯特岛附近，洪峰/潮汐峰值流量沿​​通道方向为+/- 40 cm / s，跨通道方向的二次流量达到+/- 10 cm / s的峰值。 s在潮汐周期的松弛部分。有条件采样的平均速度曲线表明洪水/潮汐流不对称，这归因于潮汐应变。呈现了时间速度谱，并显示了由于存在表面重力波场而引起的湍流谱的修改。动能耗散率的时间历史显示出潮汐时间尺度上的变化，幅度范围从10 -6 到10 -3 m 2 / s 3 。在潮汐涡轮机设计和性能的背景下讨论了结果。

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