峡江水利枢纽大江截流施工方案数值模拟研究
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摘要
为优化峡江水利枢纽大江截流施工方案,通过赣江峡江段平面二维水流数学模型对截流施工比选方案进行了数值模拟。采用峡江站水文资料及枢纽实测水位对模型进行率定,定量计算了两种不同截流施工方案坝址水域及过流建筑物水流形态,并分析了流场形态的变化特征和局部流态对枢纽尤其是龙口的影响程度。数值模拟结果显示,采用直线进占时,泄水流态差,围堰上游水位较高;折线进占虽流线流畅,上游主河道流速增大,但龙口泄流能力较差。研究结果为实际截流施工提供了论证和指导。
In order to optimize the closure construction scheme of Xiajiang hydro- junction on Ganjiang River,a 2D flow mathematical model was established and calibrated by hydrological data at Xiajiang station and water level at the dam site,then, flow patterns around the diversion structures for two closure construction schemes were analyzed quantitatively,also the variation characteristics of flow field and influence of local flow state at closure gap were studied. The study results show that the discharge flow pattern is adverse and water level of upstream cofferdam is higher for the closure scheme of linear advancing; meanwhile,for the closure scheme of fold- line advancing,the flow pattern is smoother with higher flow velocity in upstream main channel,however the discharge capacity is worse.
In order to optimize the closure construction scheme of Xiajiang hydro- junction on Ganjiang River,a 2D flow mathematical model was established and calibrated by hydrological data at Xiajiang station and water level at the dam site,then, flow patterns around the diversion structures for two closure construction schemes were analyzed quantitatively,also the variation characteristics of flow field and influence of local flow state at closure gap were studied. The study results show that the discharge flow pattern is adverse and water level of upstream cofferdam is higher for the closure scheme of linear advancing; meanwhile,for the closure scheme of fold- line advancing,the flow pattern is smoother with higher flow velocity in upstream main channel,however the discharge capacity is worse.
引文
[1]詹寿根,汤志贤.峡江水利枢纽洪水调度运行方式探讨[J].人民长江,2010,40(3):19-22.
[2]麻夏,张洁,陈九灵,等.峡江枢纽截流河道水力特性数值模拟[J].水利水运工程学报,2013,(5):26-31.
[3]刘玉玲,戎贵文,高升.曲线坐标下施工导截流二维水流数值模拟[J].水动力学研究与进展(A辑),2010,25(4):506-511.
[4]王继保,刘伟,陈和春.宽戗堤截流二维数值模拟计算研究[J].三峡大学学报:自然科学版,2009,31(4):18-22.
[5]杨青远,周苏芬,卢伟真,等.明渠交汇水流阻力对平面二维数值模拟的影响[J].水科学进展,2012,23(2):236-242.
[6]龚春生,姚琪,赵棣华.玄武湖风生流数值模拟研究[J].河海大学学报:自然科学版,2005,33(1):72-75.
[7]钏德钰,张红武,张俊华,等.游荡型河流的平面二维水沙数学模型[J].水利学报,2009,40(9):1040-1047.
[8]张明亮,沈永明,朱兰燕.受植被影响的弯曲渠道水流平面二维湍流数值模拟[J].水利学报,2008,39(7):794-1000.
[9]李健,金中武,蔺秋生.香溪河水质的平面二维数值模拟[J].水动力学研究与进展(A辑),2012,27(6):720-726.
[2]麻夏,张洁,陈九灵,等.峡江枢纽截流河道水力特性数值模拟[J].水利水运工程学报,2013,(5):26-31.
[3]刘玉玲,戎贵文,高升.曲线坐标下施工导截流二维水流数值模拟[J].水动力学研究与进展(A辑),2010,25(4):506-511.
[4]王继保,刘伟,陈和春.宽戗堤截流二维数值模拟计算研究[J].三峡大学学报:自然科学版,2009,31(4):18-22.
[5]杨青远,周苏芬,卢伟真,等.明渠交汇水流阻力对平面二维数值模拟的影响[J].水科学进展,2012,23(2):236-242.
[6]龚春生,姚琪,赵棣华.玄武湖风生流数值模拟研究[J].河海大学学报:自然科学版,2005,33(1):72-75.
[7]钏德钰,张红武,张俊华,等.游荡型河流的平面二维水沙数学模型[J].水利学报,2009,40(9):1040-1047.
[8]张明亮,沈永明,朱兰燕.受植被影响的弯曲渠道水流平面二维湍流数值模拟[J].水利学报,2008,39(7):794-1000.
[9]李健,金中武,蔺秋生.香溪河水质的平面二维数值模拟[J].水动力学研究与进展(A辑),2012,27(6):720-726.