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

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Computational Study About Behavior of an Underwater Projectile and Prediction of Surficial Pressure Loading

수중 운동체의 거동 및 표면 압력하중 예측에 관한 수치적 연구

  • Jo, Sung Min (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kwon, Oh Joon (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
  • 조성민 (한국과학기술원 항공우주공학과) ;
  • 권오준 (한국과학기술원 항공우주공학과)
  • Received : 2016.09.30
  • Accepted : 2017.04.14
  • Published : 2017.06.05
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Abstract

In the present study, two phase flows around a projectile vertically launched from an underwater platform have been numerically investigated by using a three dimensional multi-phase RANS flow solver based on pseudo-compressibility and a homogeneous mixture model on unstructured meshes. The relative motion between the platform and projectile was described by six degrees of freedom(6DOF) equations of motion with Euler angles and a chimera technique. The propulsive power of the projectile was modeled as the fluid force acting on the lower surface of the body by the compressed air emitted from the platform. Qualitative analysis was conducted for the time history of vapor volume fraction distributions. Uncorking pressure around the projectile and platform was analyzed to predict impact force acting on the surfaces. The results of 6DOF analysis presented similar tendency with the surficial pressure distributions.

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References

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