外旋立式射流减阻测试平台研制及实验

doi:10.13229/j.cnki.jdxbgxb201604024

摘要/Abstract

摘要： 以同轴圆筒旋转黏度计测量原理为基础,研制了一台适用于测量射流表面阻力的小型实验平台。通过数值模拟技术对外旋立式同轴旋转筒间环流流场进行分析,获取湍流流场中各点速度及压强分布规律,并对流场稳定性予以理论验证;依靠实验平台完成射流减阻测试实验。研究表明:湍流状态下外旋立式环流运动具有较强规律性;实验减阻效果与仿真结果趋势相近,验证了该实验平台的可行性;该实验平台具有体积小、成本低且易于实现样件表面射流等功能。此外,针对两类孔形样件实验研究表明:当外筒转速为3000 r/min,射流速度为2.5 m/s时,代号为a2b10的孔形取得了高达12.78%的减阻率。

关键词: 机械设计, 测试平台, 数值模拟, 射流减阻, 外旋立式, 同轴旋转

Abstract: A small testing platform to measure the resistance of jet surface was developed based on the principle of coaxial cylinder rotational viscometer. The circular flow field in the external-rotation vertical coaxial cylinder was analyzed using numerical simulation. The velocity and pressure distributions of the fluid in turbulence flow were obtained. The stability of the flow field was theoretically analyzed. Jet drag reduction experiments were carried out using the testing platform. Results show that the external-rotation circular flow field has strong regularity under turbulence flow. The effect of drag reduction in the experiment has the same trend as the simulation results, which verifies the feasibility of the testing platform. Compared with similar laboratory equipment for measuring the resistance between fluid and solid, the test platform has the advantage of smaller volume, lower cost, and is able to realize the function jet surface models. In addition, Experiment results with two kinds of jet hole shape show that the sample with a2b10 hole shape has good drag reduction effect when the external-rotation speed is 3000 r/min and the jet velocity is 2.5 m/s, the max drag reduction rate is 12.78%.

Key words: mechanical design, testing platform, numerical simulation, jet drag reduction, external-rotation vertical, coaxial rotation

中图分类号:

TH113.2

赵刚, 李照远, 赵华兴, 饶宇, 李芳, 刘文博. 外旋立式射流减阻测试平台研制及实验[J]. 吉林大学学报(工学版), 2016, 46(4): 1175-1181.

ZHAO Gang, LI Zhao-yuan, ZHAO Hua-xing, RAO Yu, LI Fang, LIU Wen-bo. Development and experiment of external-rotation vertical jet drag reduction testing platform[J]. 吉林大学学报(工学版), 2016, 46(4): 1175-1181.

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