研究论文
杨志峰,周雪漪,许协庆.明渠潮流中垂向紊动射流流场的数值模拟[J].环境科学学报,1994,14(2):152-159
明渠潮流中垂向紊动射流流场的数值模拟
- NUMERICAL SIMULATION FOR THE VELOCITY FIELD OF VERTICAL JET DISCHARGING INTO TIDAL RIVER
- 基金项目:国家“七五”重点攻关课题和国家自然科学基金
- 摘要:选用k-ε双方程紊流模型, 对自由水面做”动“刚盖假设, 建立了明渠潮流中垂向射流流场的数学模型。根据潮汐流动返复回荡的特点, 对离散方程组的求解采用”跟踪扫描“逐行求解法, 保护和加快了解的收敛。计算了5种不同回荡周期情况下射流流场的变化过程, 预报回流区高度与实测值吻合。分析了潮汐非恒定性的影响, 获得了一些有益的结论。
- Abstract:A mathematical model for the velocity field of vertical jet discharginginto tidal flows is presented,in which the k-εturbulent model is adopted forturbulence and the “motion”-rigid- lid approximation of the free surface isdescribed.According to the oscillation feature of tide,a track-while-scanline by line methods for solution are done on the unsteady velocity fields indifferent periodical cases.The relative height of the major recirculationzone is predicted in good agreement with the experiment data. Hence,theeffect of unsteadiness is also discussed and some conclusion remarks are given.
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