敞流式冰水二相流水体温度演变规律分析

Law Analysis of Water Temperature Evolution of Open-flow Iced-Water Two-phase Fluid

为进一步探究敞流式冰水二相流水体温度的演变规律,结合新疆某敞流式冰水二相流输水渠工程实例,监测分析了深冬季节3个典型气温条件下渠道沿程水体温度的变化及分布、水面流冰的演变等,并研究了内、外影响因素对水温演变的影响。结果表明,渠道中段水内冰大量集中产生,水体最低温度为-0.25℃,随着水内冰含量的增加,渠道末端水体最低温度回升至-0.12℃以上;气温从-5.0℃下降至-10.4℃,水头损失及潜热对水温的影响幅度由35.9%上升至46.8%,气温为-10.4^-15.5℃时,水头损失及潜热对水温的影响幅度变化不大。

In order to study the temperature evolution of open-flow iced-water two-fluid,based on the transporting of open-flow iced-water two-phase fluid in a certain channel in Sinkiang district,the water temperature distribution along the channel and the evolution from water to ice in the water surface are supervised under three typical air temperature conditions in deep winter.The evolution of water temperature is also studied via inner and outside influencing factors.The results indicate that the lowest water temperature in the middle part of the channel is-0.25℃,which is the gathering part of needle ice.With the increase of quantity of needle ice,the lowest water temperature in the end part of channel increases higher than-0.12 ℃.When the air temperature drops from-5 ℃to-10.4 ℃,the influence of water head loss and latent heat on water temperature will increase from 35.9% to 46.8%.While the air temperature varies in the range of-10.4 ℃ to-15.5 ℃,the influence for the water temperature by water head loss and latent heat will not change much.