基于人工光源加热的水库水温结构模拟技术探索

发布时间：2018-02-24 02:15

本文关键词： 水温结构镝灯太阳辐射变态比尺综合参量　出处：《水利水电技术》2017年03期 　论文类型：期刊论文

【摘要】：按照光谱一致原则,选择镝灯作为能量来源模拟太阳辐射,对水库水温结构的模拟技术进行探索性研究。通过镝灯来模拟太阳辐射对水面进行照射可以形成一定的垂向水温结构,观察镝灯对水面下水体的加热效果,发现数倍于自然太阳辐射强度的光源在数小时内,水体明显温升的范围约为水面下约20 cm,对更深处水体的加热效果十分有限。因此,水面热交换下水库水温分层结构的试验模型,可考虑利用镝灯对表层水体可快速加热的特性,根据水平变态比尺进行设计。根据综合参量的概念引入太阳净辐射通量系数Φ和水面综合散热系数K,并对其相似性进行了初步推导。在基础水温相等的情况下,原型与模型的太阳辐射通量吸收能力和水面综合散热能力均呈λ_Φ=λ_K=λ_l~(1/2)比例关系。
[Abstract]:According to the principle of spectral uniformity, dysprosium lamp is chosen as the energy source to simulate solar radiation. The simulation technology of reservoir water temperature structure is explored. The vertical water temperature structure can be formed by using dysprosium lamp to simulate solar radiation on water surface, and the heating effect of dysprosium lamp on water body under water surface is observed. It is found that the range of apparent temperature rise of the water is about 20 cm below the water surface within a few hours, which is several times the intensity of the natural solar radiation, and the heating effect on the deeper water body is very limited. In the experimental model of water temperature stratification structure under water surface heat exchange, the characteristics of rapid heating of surface water with dysprosium lamp can be considered. According to the concept of synthetic parameter, the solar net radiation flux coefficient 桅 and the water surface comprehensive heat dissipation coefficient K are introduced, and their similarity is preliminarily deduced. The solar radiation flux absorption capacity and the water surface comprehensive heat dissipation capacity of the prototype and the model are all proportional to 位 _ 桅 = 位 _ S _ K = 位 _ T / 1 / 2).
【作者单位】：中国水利水电科学研究院;天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家“十三五”重点研发计划“深水水库低温水影响控制技术与装备研究”(2016YFC0401708) 天津市应用基础与前沿技术研究计划(15JCYBJC22600)
【分类号】：TV697.21

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