Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Optimization of Flow Path of Drill Bit Using CFD Simulation

CFD를 이용한 굴착용 천공드릴비트의 유로 최적화에 관한 연구

  • Song, Chang-Heon (Construction Equipment and Parts R&D Group, Korea Institute of Industrial Technology) ;
  • Kwon, Ki-Beom (Construction Equipment and Parts R&D Group, Korea Institute of Industrial Technology) ;
  • Park, Jin-Young (Construction Equipment and Parts R&D Group, Korea Institute of Industrial Technology) ;
  • Shin, Dae-Young (Construction Equipment and Parts R&D Group, Korea Institute of Industrial Technology) ;
  • Cho, Jung-Woo (Construction Equipment and Parts R&D Group, Korea Institute of Industrial Technology)
  • 송창헌 (한국생산기술연구원 건설기계부품연구그룹) ;
  • 권기범 (한국생산기술연구원 건설기계부품연구그룹) ;
  • 박진영 (한국생산기술연구원 건설기계부품연구그룹) ;
  • 신대영 (한국생산기술연구원 건설기계부품연구그룹) ;
  • 조정우 (한국생산기술연구원 건설기계부품연구그룹)
  • Received : 2012.08.22
  • Accepted : 2012.08.24
  • Published : 2012.08.31
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Abstract

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.

본 연구에서는 드릴비트 내부 유로의 최적설계를 위하여 암분유동해석을 수행하였다. 이를 위해 암분과 기체의 다상유동해석이 가능한 전산유체역학 코드인 Star-CCM+을 사용하였다. 실제 천공시험으로부터 획득한 결과값을 기체 및 암분의 해석조건으로 적용하였다. 내부 유로 설계에 관련된 핵심인자를 3가지로 결정한 후, 다구찌 기법을 활용한 실험계획법으로부터 3가지 설계인자에 대한 최적값을 조사하였다.

Keywords

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  1. Trend Analysis of Drilling Technology for Top-Hammer Drilling Machine vol.23, pp.4, 2013, https://doi.org/10.7474/TUS.2013.23.4.271
  2. Optimum design of the internal flushing channel of a drill bit using RSM and CFD simulation vol.15, pp.6, 2014, https://doi.org/10.1007/s12541-014-0434-6