Towards multi-fidelity simulation of flows around an underwater vehicle with appendages and propeller

Theoretical and Applied Mechanics Letters

Xiaolei Yang¹  Zhaobin Li¹  Zhideng Zhou²  Guowei He² 

[1] School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;

关键词: Multi-fidelity model;    Large-eddy simulation;    Immersed boundary method;    Actuator disk model;    DARPA suboff;   

DOI  :  

来源: DOAJ

【 摘 要 】

Flow around a real-life underwater vehicle often happens at a high Reynolds number with flow structures at different scales from the boundary layer around a blade to that around the hull. This poses a great challenge for large-eddy simulation of an underwater vehicle aiming at resolving all relevant flow scales. In this work, we propose to model the hull with appendages using the immersed boundary method, and model the propeller using the actuator disk model without resolving the geometry of the blade. The proposed method is then applied to simulate the flow around Defense Advanced Research Projects Agency (DARPA) suboff. An overall acceptable agreement is obtained for the pressure and friction coefficients. Complex flow features are observed in the near wake of suboff. In the far wake, the core region is featured by a jet because of the actuator disk, surrounded by an annular region with velocity deficit due to the body of suboff.

【 授权许可】

Unknown