Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
권호 표지
DOI QR코드

DOI QR Code

Optimum Design for an Air Current Pulverizing Blade Using the Computational Fluid Dynamics

CFD분석을 통한 기류식 분쇄기 날개부의 최적설계

  • Kim, Gun-hoi (Department of Mechanical & Automotive Engineering, Jeonju University) ;
  • Kim, Han-bit (Department of Mechanical & Automotive Engineering, Jeonju University)
  • 김건회 (전주대학교 기계자동차공학과) ;
  • 김한빛 (전주대학교 기계자동차공학과)
  • Received : 2020.07.14
  • Accepted : 2020.08.03
  • Published : 2020.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

In the air current pulverizing type grinding method, the blade wings fitted inside a casing are rotated at a high speed to generate a cornering air current, which facilitates the collision of materials with one another, leading to the pulverizing phenomenon. In contrast to mechanical grinding, grit pulverizing leads to fine grinding and less acid waste and degeneration of the material. Moreover, this approach prevents the loss of nutritional value, while allowing the milling grain to have an excellent texture. However, the existing air current pulverizing type machines consist of prefabricated blades, which cannot be rotated at a speed higher than 5,000 rpm. Consequently, the grinding process becomes time consuming with a low productivity. To overcome these problems, in this study, the shape and structure of the air current pulverizing type wings were optimized to allow rapid grinding at more than 8,000 rpm. Moreover, the optimal design for the ripening parts for the air current pulverizing type device was determined by performing a computational fluid dynamics analysis based on airflow analyses to produce machinery that can grinding materials to the order of micrometers.

Keywords

References

  1. Lee, M. G., Son S. H., Choung, M. G., Kim, S. T., Ko, J. M., Han, W. Y., Yoon, W. B., " Effect of Milling Methods and Particle Size on Rice Cake (Baeksulgi) Characteristics. Korean Society for Food Engineering," Journal of the Korean Society for Food Engineering Vol. 19, Issue. 1, pp. 1-7, 2015.
  2. Ryu, B. M., Kim, C. S., "Impact of Milling Method on Quality Parameters of Waxy Sorghum Flour", Korean Society of Food and Cookery Science. Journal of the Korean Society of Food and Cookery Science, Vol. 29, Issue. 2, pp. 129-135, 2013. https://doi.org/10.9724/kfcs.2013.29.2.129
  3. Hirt, C. W. and Nichols, B. D., Volume of fluid (VOF) method for the dynamics of free boundaries, Journal of computational physics, Vol. 39, No. 1, pp. 201, 1981. https://doi.org/10.1016/0021-9991(81)90145-5
  4. Kim, Y. H., Lee, S. K., " Solver for the Navier-Stokes Equations by using Initial Guess Velocity", Journal of KIISE: Computer Systems and Theory, Vol. 32, No. 9, pp. 445-456, 2005.
  5. Atsushi U., Basic Course of Thermo-Fluid Analysis 15, 2019.
  6. Henry, J., Ramos, M. A., "Factorization of boundary value problems using the invariant embedding method," Elsevier, 2016.
  7. Du, L. X., Zeng, M., Wang, Q. W., "A Simplified CFD Model With Multi-Periodic Boundary Conditions for Cross Wavy Channels", In Turbo Expo: Power for Land, Sea, and Air, 2012.
  8. Autodesk Inc.(2019), Periodic Boundary Condition https://knowledge.autodesk.com/ko/support/cfd/learn-explore/caas/CloudHelp/cloudhelp/2019/KOR/SimCFD-UsersGuide/files/GUID-54B9C5DB-63E8-4D62-94FD-363FC46465C7-htm.html
  9. Autodesk Inc. discretization method, 2016. https://knowledge.autodesk.com/ko/support/cfd/learn-explore/caas/CloudHelp/cloudhelp/2018/KOR/SimCFD-Learning/files/GUID-DEE0664D-771B-4446-9ED4-1498267D13FB-htm.html
  10. Kim, G. H., "Optimal Shape Design of ANG Fuel Vessel Applied to Composite Carbon Fiber," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 18, No. 1, pp. 65-71, 2019. https://doi.org/10.14775/ksmpe.2019.18.1.065
  11. Kim, G. H., Manufacturing of Apparatus for Producing Stream Crushing Units, Project Report LINC+, pp. 5-45, 2019.
  12. GV, GV-CNC Users Manual, Cubictek do., ltd, pp. 97-118, 2018.
  13. Lee, H. S., Na, Y. M., Jang, H. S., Suk, I. H., Kang, S. H., Kim, H. J., Park, J. K., "A Study on the Stability of Shield TBM Thrust Jack in the Behavior of Operating Fluid According to Thrust Force", Journal of the Korean Society of Manufacturing Process Engineers Vol. 18, No. 1, pp. 38-45, 2019. https://doi.org/10.14775/ksmpe.2019.18.1.038
  14. Yoon, H. Y., Jeon, G. H., Choi, J. Y., "A Study on the Design of Transmission Oil-Seal Using 2D Finite Element Analysis", Journal of the Korean Society of Manufacturing Process Engineers Vol. 18, No. 1, pp. 85-93, 2019. https://doi.org/10.14775/ksmpe.2019.18.1.085