Optimization of Flow Path of Drill Bit Using CFD Simulation

CFD를 이용한 굴착용 천공드릴비트의 유로 최적화에 관한 연구

  • Received : 2012.08.22
  • Accepted : 2012.08.24
  • Published : 2012.08.31


In this study, a series of CFD (Computational Fluid Dynamics) simulations carried out to evaluate the optimum design model of the internal flow path of drill bit. The Star-CCM+ code was adopted to simulate the multi-phase discharge flow of rock particles and flushing air during a drilling process. The input parameters for the flow simulation of rock particles and air were obtained from the in-situ drilling test results. After the three design factors were determined, the experimental design method (Taguchi method) was utilized to evaluate the optimum value of each factor.


Drilling;Drill bit;CFD (Computational Fluid Dynamics);Multi-phase flow;Taguchi method


  1. The Freedonia Group Inc., 2009, World Mining Equiment.
  2. Bu Changgen, Qu Yegao, Cheng Zhiqiang, Liu Baolin, 2009, Numerical simulation of impact on pneumatic DTH hammer percussive drilling, Journal of Earth Science, 20.5, 868-878.
  3. Shin, D. Y., Song, C. H., 2012, Performance Optimization of Down-the-Hole Hammer Using Taguchi Method, Transactions of the Korean Society of Mechanical Engineers-A 36.1, 109-116.
  4. Oh, J. Y., Lee, G. H., Song, C. S., 2011, A Study on the Analysis of Hydraulic Circuit of a Rockdrill Drifter, The Korea Fluid Power System Society, Proceeding of the KFPS 2011 Spring Conference, 70-75.
  5. 김광염, 김창용, 김광식, 2008, 균질 암반에서의 유압식 천공데이터 평가, 한국암반공학회지, 18(6), pp. 480-490.
  6. Rhie, C. M., Chow, W. L., 1983, Numerical Study of the Turbulent Flow Past an Airfoil with Edge Separation, AIAA Jounal, 21.11, 1525-1532.
  7. Lee, B. H., Yi, J. S., Kim, B. H., Chung, H. S., 2009, A Numerical Analysis on EGR Cooler of CI Engine, The Korean Society of Automotive Engineers, Annual Conference, 197-202.
  8. El Tahry, S.H., 1983, $k-{\varepsilon}$ equation for compressible reciprocating engine flows, AIAA Jounal of Energy, 7.4, 345-353.
  9. Launder, B.E., and Spalding, D.B. 1974, The numerical computation of turbulent flows, Computer Methods in Applied Mechanics and Engineering, 3.2, 269-289.
  10. Rodi, W. 1979, Influence of buoyancy and rotation on equations for the turbulent length scale, Proc 2nd Symp, on Turbulent Shear Flows.
  11. STAR-CCM+ Version 7.02 0.11, User guide 2011, CDAdapco.
  12. Markku Terasvasara, Surface drilling in open pit mining, Atlascopco, First edition 2006.
  13. Markku Terasvasara, Surface drilling in Quarry and Construction, Atlascopco, Third edition 2006.
  14. 박동규, Minitab을 활용한 실험계획법, 기전연구사, 2008.
  15. 이레테크 사업팀, 새 Minitab 실무완성, 이레테크, 2009

Cited by

  1. Trend Analysis of Drilling Technology for Top-Hammer Drilling Machine vol.23, pp.4, 2013,
  2. Optimum design of the internal flushing channel of a drill bit using RSM and CFD simulation vol.15, pp.6, 2014,


Grant : 굴착용 천공 드릴 모듈

Supported by : 지식경제부