| 水口电站日调节不稳定流数值模拟 |
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| 引用本文： | 李新通,林其东.水口电站日调节不稳定流数值模拟[J].福建师范大学学报(自然科学版),1993,9(1):98-104. |
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| 作者姓名： | 李新通 林其东 |
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| 作者单位： | 福建师范大学地理系，福建师范大学地理系 |
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| 摘 要： | 用一维不稳定流数学模型模拟枯水期水口电站下游日调节不稳定流。选择Preissmann差分格式,把模型转化为有限差分方程组,并用“双扫描”法求解。依据水文气象资料,确定旁侧入流,用满宁方程反推糙率,并拟合了糙率随水深、流量变化的曲线。电站出流过程线、解放大桥水位过程线分别作为上、下边界条件,局部水头损失考虑了桥墩阻水和淮安分流的影响,在IBM-286机上实现了坝下长约72km河段内,日调节不稳定流的衰减过程的模拟运算。
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| 关 键 词： | 不稳定流 数值模拟 水电站 |
The Computer Simulation of Daily Regulating Unsteady Flows below Shuikou Hydro-power Station |
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| Li Xintong Lin Qidong.The Computer Simulation of Daily Regulating Unsteady Flows below Shuikou Hydro-power Station[J].Journal of Fujian Teachers University(Natural Science),1993,9(1):98-104. |
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| Authors: | Li Xintong Lin Qidong |
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| Institution: | Department of Geography |
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| Abstract: | The one dimensional model is employed to simulate the daily regulating unsteady flows below Shuikou reservoir. The finite-difference equations are formulated from Preissmann's implicit method, and solved by the double-sweep method. Lateral inflow is determined on the basis of the hydro-meteorological data. Manning's coefficients are obtained from field-mersured data by solving steady momentatum equation. Interior and exterior boundary conditions such as reservoir autflow, the variation of n with Q, Hui'an bifurcation, energy loss at bridge and downstream stage hydrograph are under consideration. The computations are performed using a time interval of 3 minutes for the sudden changes in discharge and a time interval of 57 minutes are used for the slowly varying parts of the flow. The numerical results achieved by using IBM-286 microcomputer. |
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| Keywords: | daily regulating unsteady flow four-point implicit method numerical simulation |
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