杭州西湖三维流场特性的现场观测及模拟研究

发布时间：2018-04-21 05:29

  本文选题：西湖 + 分层流场　； 参考：《水力发电学报》2017年09期

【摘要】：采用浮标下挂ADCP仪方法,开展了西湖分层流场的现场观测,首次通过实测资料证实了西湖垂向环流的存在。采用EFDC模型对实测风场作用下的西湖分层流场进行了数值模拟,垂向流速分布特性的模拟结果与实测结果符合较好,表明该模型可以适用于西湖流场的数值模拟。在2013年西湖实测风场分析的基础上,对比分析了常风向东北风与西南风作用下的西湖分层流场特性,结果显示风场是影响西湖流场的敏感因素,尤其对表层流场作用明显。受风场作用,东北风条件下在外湖湖心与东南近岸水域存在顺时针环流,西南风条件下在外湖湖心与东南近岸水域存在逆时针环流。湖区流速为mm/s~cm/s,且分布不均匀,其中进、出水口及近岸水域流速相对较大,湖心流速较小。
[Abstract]:The field observation of the stratified flow field in the West Lake was carried out by means of the ADCP instrument under the buoy. The existence of the vertical circulation in the West Lake was confirmed by the measured data for the first time. The EFDC model is used to simulate the stratified flow field in the West Lake under the action of wind field. The simulation results of vertical velocity distribution are in good agreement with the measured results, which indicates that the model can be applied to the numerical simulation of the flow field in the West Lake. Based on the analysis of the measured wind field in the West Lake in 2013, the characteristics of the stratified flow field in the West Lake under the action of the northeasterly wind and the southwest wind are compared and analyzed. The results show that the wind field is a sensitive factor affecting the flow field in the West Lake, especially the surface flow field. Under the action of wind field, there exists clockwise circulation in the outer lake center and southeast coastal waters under the northeast wind condition, and counterclockwise circulation in the outer lake center and southeast coastal waters under the southwest wind condition. The velocity of the lake is mm / s / cm / s, and its distribution is not uniform. The velocity of the inlet, outlet and inshore waters is relatively large, and the velocity of the center of the lake is relatively small.
【作者单位】： 浙江省水利河口研究院;
【基金】：浙江省科技厅院所专项(2017F30006) 浙江省重大科技专项(2015C03007) 浙江省水利厅科技计划项目(RA1602)
【分类号】：TV221
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本文编号：1781113