【摘 要】
：
诱导流体产生纵向涡结构可以有效强化对流换热,因此研究纵向涡发生器的扰流特性对于深化强化传热机理具有重要意义。利用粒子成像测速（PIV）技术,对圆管内置梯形翼片扰流后的流
论文部分内容阅读
诱导流体产生纵向涡结构可以有效强化对流换热,因此研究纵向涡发生器的扰流特性对于深化强化传热机理具有重要意义。利用粒子成像测速（PIV）技术,对圆管内置梯形翼片扰流后的流场进行了测量,实验中4个梯形翼片沿周向均布,与管壁夹角135°呈迎流放置,分析了横、纵截面内的流场结构和流动特点。结果显示,管内放置翼片能够诱导形成多纵向涡流动,在下游产生了4个对称的涡偶,每个涡偶对应的两个涡旋转方向相反,形成了内侧向壁流,外侧背壁流的流动结构,增大了垂直于主流方向上的速度分量。实验涉及的Reynolds数范围内
其他文献
A 16-year-old man had aswelling over the anterior aspect of the proximal third of the tibia for 1 year,which was peanut size initially and progressively increas
In view of the enormous popularity of mass sporting events such as half-marathons,the number of patients with exertional rhabdomyolysis or exercise-induced heat
Glioblastoma multiforme(GBM)is the most common malignant primary brain tumor with a survival prognosis of 14-16 mo for the highest functioning patients.Despite
Lung cancer represents the leading cause of cancer mortality worldwide.Despite improvements in preoperative staging,surgical techniques,neoadjuvant/adjuvant opt
Pelvic cancers are among the most frequently diagnosed neoplasms and radiotherapy represents one of the main treatment options.The irradiation field usually enc
Screening for cervical cancer with DNA ploidy assessment by automated quantitative image cytometry has spread throughout China over the past decade and now an e
2016年12月,阜新市进村入户项目2016年收官之作——优秀益农信息社社长投票评选活动拉开了帷幕。在这个热闹的冬天,12316接到了很多热情洋溢的农民朋友打来的投票电话,微信也
2013年起，辽宁12316金农热线沿着服务云的理念开始延伸服务，将服务坐席延伸到市、县、乡、村，充分发挥当地政府资源、专家资源、市场资源，各市县努力打造具有地方特色的12316三农
Laparoscopy-related tumor implantations of gynecological malignancies into the subcutaneous tissue are rarely diagnosed.We report an interesting case of a 46-ye
Point-of-care ultrasound has been increasingly used in evaluating shocked patients including the measurement of inferior vena cava(IVC)diameter.Operators should