横流中多孔热水排放温度特性分析

Analysis of Temperature Characteristic for Multi-Hole Heated Water Discharge in Flow

摘要: 根据计算流体动力学和数值传热学理论建立了考虑浮力作用的多孔热水水平排放的数学模型，采用有限体积法来离散求解多孔热水排放的三维数学模型，对多孔热水流动轨迹的温度分布特性进行了数值计算与分析，得到了多孔热水轨迹的温度分布，分析了热水孔个数和相对孔间距对热水轨迹温度分布的影响。对计算结果的分析表明，热水排放总量和排放温度保持不变、相同出口流速条件下，热水单孔排放和减小相对孔间距有利于加快热水轨迹的热扩散，能够更好地减弱热排放对环境的热污染。

Abstract: According to the theory of computational fluid dynamics and numerical heat transfer, the mathematics model of multi-hole horizontal heated water discharge is established and solved with numerical analysis by finite volume method. The temperature distribution of multi-hole heated water path is calculated and obtained with numerical methods. The effect of number of holes and relative hole spacing on the temperature distribution of heated water path are analyzed. Results indicate that under the same heated water discharge, the same discharge temperature, and the same hole velocity, one-hole discharge or reducing hole spacing will enhance the thermal diffusion of heated water path, and can decrease thermal pollution on the environment effectively.