수중 운동체의 거동 및 표면 압력하중 예측에 관한 수치적 연구 A Computational Study About Behavior of an Underwater Projectile and Prediction of Surficial Pressure Loading

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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 pseudocompressibility 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.
Publisher
한국군사과학기술학회
Issue Date
2017
Language
Korean
Keywords

Computational Fluid Dynamics(전산유체역학); Unstructured Overset Mesh Technique(비정렬 중첩격자기법); Uncorking Pressure(사출 압력); 6Degrees of Freedom(6자유도)

Citation

한국군사과학기술학회지, v.20, no.3, pp.405 - 412

ISSN
1598-9127
DOI
10.9766/KIMST.2017.20.3.405
URI
http://hdl.handle.net/10203/241252
Appears in Collection
AE-Journal Papers(저널논문)
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