盐度分层水域温排水流动特性的三维数值模拟

3-D Numerical Simulation on Heated Discharge at Salinity Layering Water Area

为了研究盐淡水分层水域温排水的水力热力特性,在物理模型试验的基础上,基于ECOMSED三维非线性水动力模式,在考虑上游径流和潮流共同作用的情况下,对温度和盐度相互影响的水流进行了数值模拟。在对该水域的潮流验证良好的基础上,通过模拟得到了温度和盐度的垂向分布、不同水深处全潮平均温升场,以及涨急、涨憩、落急、落憩四个典型时刻温度场的特征值,与试验值进行比较,分析温盐扩散的机理。结果表明,该数值模型基本反映了非恒定盐淡水交汇水域的温盐输运扩散规律。

In order to study the thermodynamic properties of heated discharge in tidal-sensitive water area, it used improved ECOMSED to simulate tidal current and flow rate. The results of numerical calculation are in good agreement with the test results. By three-dimensional numerical simula- tion on heated discharge and salinity distribution, the characteristic values of vertical temperature and salinity layering, average temperature field and four typical moments are obtained, which are the same with the regularity of physical model test. The numerical model earl better reflect the temperature migration law of non-constant of the salt-fresh water intersection.