PIV Experiments on Flow Field of Stirred Tank with Improved INTER-MIG Impeller

Lulu WANG  Yongjun ZHOU  Suyang BAO  Wei XIN  Lanlan TAO

doi:10.12034/j.issn.1009-606X.216263

The Chinese Journal of Process Engineering >

2017 , Vol. 17 >Issue 3: 447 - 452

DOI: https://doi.org/10.12034/j.issn.1009-606X.216263

Flow & Transfer

PIV Experiments on Flow Field of Stirred Tank with Improved INTER-MIG Impeller

Lulu WANG Yongjun ZHOU Suyang BAO Wei XIN Lanlan TAO

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1. College of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China;
2. National Quality Supervision and Inspection Center of Chemical Equipment, Special Equipment Safety Supervision Inspection Institute of Jiangsu Province, Suzhou, Jiangsu 215600, China

Received date: 2016-07-28

Revised date: 2016-11-15

Online published: 2017-06-14

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Abstract

The flow field in the stirred tank with double improved INTER-MIG impeller was studied by using particle image velocimetry (PIV), of which the tank was 0.43 m in diameter. The three influence factors namely the fluid viscosity, the impeller rotation speed, and the size of bottom impeller, were taken into investigation to study the influence they exerted on flow field. The results indicated that the local vortices increased according to the augment of viscosity when the viscosity was less than 962.5 mPa·s, which was beneficial to overall mixture. However, the two vortexes of poor converging capacity formed when viscosity was 962.5 mPa·s, are adverse to overall mixture. Within the range of Reynolds number between 459 and 918, the increment of impeller rotation speed almost had no effect on the dimensionless axial velocity in blade’s apex. Nevertheless, when the fluid was away from the blade, the increment of impeller rotation speed turned to cause the rise of dimensionless velocity. While less influence had been taken by the size of bottom impeller to dimensionless radial velocity, there was a significant impact of the same factor while we examined on the dimensionless axial velocity at bottom impeller area. The dimensionless axial velocity and turbulent kinetic energy reached to its maximized value when the specification of bottom impeller size was D/T=0.57. In addition, the power consumption enhanced synchronously with the size of bottom impeller.

Key words： ; font-size: 10pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体; mso-bidi-font-size: 9.0pt" lang="EN-US">stirred tank; improved INTER-MIG impeller; particle image velocimetry; flow fluid; dimensionless

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Lulu WANG Yongjun ZHOU Suyang BAO Wei XIN Lanlan TAO . PIV Experiments on Flow Field of Stirred Tank with Improved INTER-MIG Impeller[J]. The Chinese Journal of Process Engineering, 2017 , 17(3) : 447 -452 . DOI: 10.12034/j.issn.1009-606X.216263

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