横流中底部排污混合区的分析计算

采用Ｋ－ε紊流模型对环境水力学中目前研究尚少的横流中底部排污问题进行了数值模拟．用有限分析法给出了正常网格求解原参数的速度、压力迭代格式．静止环境中自由射流和横流中垂直射流的计算结果与实验资料吻合较好．本文首次对横流中不同射流动量比的垂直、倾斜和水平底部排污混合区进行了较全面地、系统地数值计算和分析，给出了不同工况的速度、浓度分布特性和经验公式．

Calculation for Mixing Region of Bottom Jet in a Cross Flow

The K-ε turbulent model is adopted to simulate the bottom drainage effluent in across flow, which is seldom studied in environment hydraulics. A new iteration method isgiven to solve the velocity and pressure of original parameters by using finite analytic methodin regular grid. The computational results of free jet in stationary environment and verticaljet in cross flow are in good agreement with the experimental data. The calculation andanalysis are also conducted for the mixing region of horizontal jet, inclined jet and vertical jetat the bottom of a cross flow and finally, the character and empirical formulas of velocity andconcentration distribution are presented.