摘要
文章基于多相流理论,建立了河流的热力与水力条件耦合的二维河道模型。模型把河流当作大气-冰体-水体的一个耦合系统,考虑了系统中界面的热量交换,并考虑了冰花在冰盖下堆积对冰盖热量交换的影响。在不同的入口冰花浓度、冰盖上表面温度、入口水流速度的工况下,对冰盖的增长进行了模拟分析,获得了冰盖厚度的增长特征与冰盖形成后水体速度场和温度场的分布特征。模拟结果表明:入口冰花浓度越大、冰盖上表面温度越低、入口流速越小,则形成的冰盖厚度越大;断面上的流速越大,水温越低。
Based on the multiphase flow theory, a two-dimensional river model in which the thermal condi- tion is coupled with the hydraulic condition is established. The model treats the river as a coupled air-ice water system, taking into consideration the heat exchanges at interfaces in the system and the effect of the accumulation of frazil ice under the ice cover on the heat exchange through the cover. Under different en- trance frazil concentrations, wall-up temperature and entrance flow velocity, the growth of ice cover is simulated and analyzed to obtain the features of ice thickness and the features of the water velocity and temperature distribution under ice cover. The results show that the greater entrance frazil concentrations, the lower the wall-up temperature, the smaller entrance velocity, the greater ice thickness; and that the greater flow velocity of the section, the lower water temperature.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第8期1080-1083,共4页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(50979021)
关键词
水温分布
断面流速
冰盖厚度
数值模拟
water temperature distribution
section velocity
ice cover thickness
numerical simulation
