以气温为边界条件的水库冰盖厚度的数值模拟研究

针对寒区水库冰盖厚度增长的数值模拟问题,依据黑龙江省红旗泡水库2008年、2009年2个冬季现场观测的气温、冰温等实测数据,应用最小二乘法进行参数辨识,改进前人关于冰面温度与气温关系的表达形式,确定了黑龙江省大庆地区水库冰盖冰面温度依赖于大气温度的线性变化关系.分析了前人对寒区水库冰盖热力模式及冰厚增长数值模拟研究的方法,对其一维热力学模型和单相Steften问题所采用的数值解法进行了改进,用已给出的转换关系将大气温度转换后的冰面温度作为边界条件,对黑龙江省红旗泡水库2008、2009年2个冬季冰盖厚度的增长情况进行了数值模拟,数值模拟结果与现场实测数据吻合良好.

Study on numerical simulation of growth in thickness of ice caps in reservoirs in the boundary condition of atmospheric temperature

Aiming at the problem of numerical simulation of growth in the thickness of the ice caps in the reservoirs in cold regions, according to the observed data of ice surface and atmospheric tempera- ture in Hongqipao reservofir in Heilongjiang in two winters in 2008 and 2009, we perform parameter identification by applying least squares method, improve previous. benefice expression form about the relationship between temperature of ice surface and atmospheric temperature, confirm corre- sponding relationship between temperature of ice surface and atmospheric temperature in Daqing in Heilongjiang Province. The thesis has analyzed previous~ methods of the heat model and the numeri- cal simulation of the growth in the thickness of the ice caps in the reservoirs of cold regions, and has made the improvements on the numerical solutions that are adopted in the one-dimensional heat mod- el and the one-dimensional single-phase Steften problem. We perform numerical simulation to the growth in the thickness of the ice caps in Hongqipao reservoir in Daqing in Heilongjiang in two win- ters in 2008 and 2009 in the boundary condition of temperature of ice surface after the conversion of atmospheric temperature. The simulation results are well consistent with measured data.