侧载对矩形通道内水流动特性影响的实验研究  

Experimental Study of the Effect of Side Load on Flow Characteristics of Water Flow in a Rectangular Channel

作　　者：李冈[1] 宋保银[1] 张钊[1] 王洪[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《制冷与空调（四川）》2015年第3期237-242,共6页Refrigeration and Air Conditioning

基　　金：国家自然科学基金项目(50576035);高等学校博士学科点专项科研基金项目(20040287017);江苏高校优势学科建设工程资助项目

摘　　要：利用旋转平台,对侧向动载下截面尺寸为10mm×5mm水平矩形通道内水流动特性的影响进行了实验研究。实验分别在冷态单相流和热态沸腾两相流条件下进行。通过测量和摄像,获得了侧载下试验段压力、压降、流量、参考壁温等参数及两相流型影像。研究结果表明:冷态下流量随动载的增大而缓慢降低,压降随动载的增大而增大;热态下,随着动载的增大,测壁温度、入口压力及沸腾压降均有不同程度的减小;大动载对气泡的移动和聚合有显著影响。实验结果对飞行器蒸发循环制冷系统的研制有参考价值。Experiments to investigate the effect of side load on the flow behavior of the water in a rectangular channel with a cross section of 10mm×5mm have been conducted on a rotational platform. The experimental conditions involved single-phase flow without heating and boiling two-phase flow of water heated from the bottom of the channel. Some parameters such as pressure, pressure drop, flow rate and wall temperature measuring in test section under side load were measured, and some images of two-phase flow patterns under dynamic load were also recorded with a video camera. The results show that the flow rate decreases slowly and the pressure drop increases with increasing dynamic load in cold condition; but the wall temperature measuring, inlet pressure and pressure drop all decrease with increasing dynamic load for boiling two-phase flow; the effect of dynamic load on bubble movement and gathering is obvious. The experimental date can be a reference to the development of aircraft vapor cycle cooling system.

关 键 词：动载 矩形通道 流动特性 实验研究 

分 类 号：V216[航空宇航科学与技术—航空宇航推进理论与工程] TK124[动力工程及工程热物理—工程热物理]