Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
권호 표지
DOI QR코드

DOI QR Code

Design of Helical Ribbon Type Impeller for Agitation Using CFD Analysis

전산유동해석을 활용한 헬리컬 리본형 교반기 임펠러 설계

  • 윤정의 (강원대학교 공학대학 기계설계공학과)
  • Received : 2019.02.12
  • Accepted : 2019.03.14
  • Published : 2019.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

The agitator is an important industrial instrument widely used for mixing various solutions in the industrial field. In this study, the optimized design of the helical ribbon type impeller, which is mainly used for the stirring of the high viscosity solution, is carried out by CFD analysis. For this purpose, an index for evaluating the agitation performance is newly defined and an optimization design process is performed through a multiphase computational fluid dynamic analysis. From these results, it is understood that the stirring performance is maximized in the case of the helical ribbon impeller under given operating conditions when the width is 7.5 mm, the height is 160 mm and the turn is 1.

Keywords

OMHHBZ_2019_v24n1_15_f0001.png 이미지

Fig. 1 Definition of planes for calculating Qf in Eq. (1)

OMHHBZ_2019_v24n1_15_f0002.png 이미지

Fig. 2 Definition of optimal design variables in helical ribbon impeller

OMHHBZ_2019_v24n1_15_f0003.png 이미지

Fig. 3 Computational grid and domains for 3-D simulation

OMHHBZ_2019_v24n1_15_f0004.png 이미지

Fig. 4 Distribution of viscous fluid volume fraction

OMHHBZ_2019_v24n1_15_f0005.png 이미지

Fig. 6 Response surface of power coefficient NP as function of width and height of impeller for each turn (Rotational speed=30 rpm, Fluid viscosity=200,000 cP)

OMHHBZ_2019_v24n1_15_f0006.png 이미지

Fig. 7 Response surface of pumping effectiveness ηp as function of width and height of impeller for each turn (Rotational speed=30 rpm, Fluid viscosity=200,000 cP).

OMHHBZ_2019_v24n1_15_f0007.png 이미지

Fig. 5 Response surface of flow coefficient Nf as function of width and height of impeller for each turn (Rotational speed=30 rpm, Fluid viscosity=200,000 cP).

Table 1 Grid information and boundary conditions for 3-D simulation of impeller and vessel

OMHHBZ_2019_v24n1_15_t0001.png 이미지

References

  1. K. Takahashi, M. Sasaki, K. Arai and S. Saito, "Effects of Geometrical Variables of helical Ribbon Impellers on Mixing of Highly Viscous Newtonian Liquids", J. of Chemical Engineering of Japan, Vol. 15, No. 3, 1982, pp. 218-224.
  2. L. S. Perse and M. Zumer, "Mixing and Viscosity Determinations with Helical Ribbon Impeller", Che. Biochem. Eng. Vol. 14, No. 4, 2004, pp. 363-371.
  3. D. Garcia-Cortes, E. Ferrer, and E. Barbera, "Hydrodynamic Characterization of the Flow induced by a Four-Bladed Disk-Style Turbine", Chemical Engineering Research and Design, Vol. 79, Part A, 2001, pp. 269-273. https://doi.org/10.1205/026387601750281798
  4. Y. Choi, J. Choi, D. Kim and N. Hur, "A Numerical Analysis on Mixing Performance for Various Types of Turbine Impeller in a Stirred Vessel", Korean Society Computational Fluids Engineering, Vol. 16, No. 1, 2013, pp. 47-55.
  5. H. Ameur, Y. Kamla and D. Sahel, "Performance of Helical Ribbon and Screw Impellers for Mixing Viscous Fluids in Cylindrical Reactors", ChemEngineering, 2018.
  6. A. A. Rsheed, Y. S. Fangary and N. A. Mahmoud, "Apparent Viscosity Mixing Index Using CFD Computations for Non-Newtonian Fluids Using Helical Ribbon Impeller", Journal of Engineering Sciences, Vol. 39, No. 4, pp. 827-838, 2011.
  7. ANSYS Workbench DesignXplorer User's Guide, Release 18.2.
  8. ANSYS CFX-Solver Modeling Guide, Chapter 12, Release 18.2.