浮式管型取水方式下的分层型水库下泄水温研究

Research on Temperature of Water Released from Floating Tubular Intake of Stratified Reservoirs

调节性较好的水库往往表现出不同程度的水温分层,导致春夏季下泄水温普遍偏低,对下游生态环境及农业灌溉等造成不利影响。浮式管型取水方式作为一种有效的表层取水措施,其相关研究仍较缺乏。本文依据某大型水库水温资料,在建立物理模型有效还原其水温分布的基础上,探究采用浮式管型取水方式对下泄水温的提高效果,并结合数值模拟方法,对试验过程的流场、温度场进行综合分析。结果表明,在设定的各工况下,浮式管型取水方式均能有效提升下泄水温,较采用单层取水方式平均提高了3.2℃。成果可为浮式管型取水方式下的水库下泄水温研究提供有效的方法体系与应用参考。

The stratification phenomenon of water temperature is frequently exhibited at different degree in the reservoirs with good regulation behavior. This phenomenon generally leads to low temperature of water released in spring and summer, causing an adverse impact on downstream ecological environment and agricultural irrigation. As an effective measure of taking water from surface, the floating tubular intake structure is in need of further study. In this study, based on water temperature data of a large reservoir, a physical model was set up to simulate the water temperature stratification, and studied the improvement degree of released water temperature by floating tubular intake method. Combining with numerical simulation method, analyzed the flow field and temperature field, during the experiment. The results showed that under setting conditions, the released water temperature could be effectively increased by using the floating tubular intake. The temperature increased 3.2℃ on average compared with using the single intake. The results could provide effective methodology for related research as well as a beneficial reference for the application of floating tubular water intake in stratified reservoirs.