吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (4): 1175-1181.doi: 10.13229/j.cnki.jdxbgxb201604024

• Orginal Article • Previous Articles     Next Articles

Development and experiment of external-rotation vertical jet drag reduction testing platform

ZHAO Gang1, LI Zhao-yuan2, ZHAO Hua-xing1, RAO Yu1, LI Fang1, LIU Wen-bo1   

  1. 1.College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China;
    2.Nanjing Research Institute of Simulation Technology,Nanjing 210016,China
  • Received:2014-06-24 Online:2016-07-20 Published:2016-07-20

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

CLC Number: 

  • TH113.2
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