Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Numerical Analysis on the Resistance and Propulsion Performances of High-Speed Amphibious Assault Vehicles

고속 상륙돌격장갑차의 저항 및 추진 성능에 관한 수치 분석

  • Kim, Taehyung (Ground Technology Research Institute, Agency for Defense Development)
  • 김태형 (국방과학연구소 지상기술연구원)
  • Received : 2020.07.14
  • Accepted : 2020.10.09
  • Published : 2021.02.05
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Abstract

The hydrodynamic characteristics of amphibious assault vehicles are investigated using commercial CFD code, STAR-CCM+. Resistance performances of a displacement-type vehicle and a semi-planing type vehicle are analyzed in calm water. The self-propelled model is also computed for the semi-planing type vehicle. All computations are performed using an overset mesh system and a RANS based flow-solver coupled with a two-degree of freedom equations of motion. A moving reference frame is applied to simulate revolutions of impeller blades for a waterjet propulsion system. Grid dependency tests are performed to evaluate discretization errors for the mesh systems. The numerical analysis results are compared with the experimental results obtained from model tests. It is shown that RANS is capable of investigating the resistance and self-propulsion characteristics of high-speed amphibious assault vehicles. It is also found that a fully covered side skirt, which is covering tracks, reduces resistance and stern trim, besides increasing propulsive efficiency.

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References

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