冬季引水明渠冰盖生长的数值模拟

Numerical simulation of ice cover growth for open diversion canal in winter

冬季寒区引水明渠的结冰问题会影响河道的运行和管理,文章利用热力和水力耦合的数学模型对不同条件下二维渠道内的冰盖生长进行数值模拟,通过改变水流速度、气温、水深以及风速的大小分析形成的冰盖厚度;根据数值模拟结果,得出了寒区引水明渠冰盖厚度的增长规律与冰盖形成后水流速度场和温度场的分布规律,以及不同因素对渠道结冰的影响程度。

Freezing of open diversion canals is an important phenomenon that affects winter operation and management of the canals in cold regions. A hydraulic and thermodynamic coupled mathematical model is applied to simulate the ice cover growth of a two dimensional canal under the different operating conditions. The ice cover thickness is analyzed by taking into account the change of flow velocity, atmospheric temperature, water depth and wind speed. The increasing law of ice cover thickness, the distribution law of water velocity field and temperature field after the freeze and the influencing factors of the canal freeze in cold regions are obtained based on the simulation results.