摘要
运用两相流混合模型对横流中垂直出流式多孔射流进行数值模拟,并结合室内水槽实验的实测结果,验证了该模型能够较好地预测横流中多孔射流的浓度场.针对实验和模拟结果,给出了中心纵剖面浓度分布、射流轨迹线以及浓度的沿程变化规律,分析了水深和流速比对多孔射流稀释特性的影响.通过数值模拟计算结果,观察到多孔射流的分叉和融合现象,可以定量地分析多孔射流的融合位置及其浓度的变化,为扩散器的理论研究和设计提供可靠的依据.
A two-phase mixture model was used to simulate the vertical multiple jets in a crossflow.The results of this model agree well with experimental measurements and it shows that this model can well predict the concentration field of multiple jets in crossflow.The concentration distribution in the central lateral plane,the jet trajectories and the concentration decay along the jet trajectories were presented based on the experimental and simulated results.The influence of water depth and the jet-to-current velocity ratio on the dilution characteristics were analyzed.By the numerical simulation results,the phenomenon of bifurcation and merging of multiple jets can be observed.The merging location of multiple jets and the change of the concentration were quantitatively analyzed.This provides the reliable basis for the theoretical study and design of the diffusers.
作者
高猛
槐文信
曾玉红
Gao Meng;Huai Wenxin;Zeng Yuhong(State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Chin)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第6期94-98,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(11672213
51439007)
关键词
多孔射流
射流轨迹线
浓度分布
浓度衰减
数值模拟
multiple jets
jet trajectory
concentration distribution
concentration decay
numerical simulation
