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

作　　者：Zhideng Zhou Zhaobin Li Guowei He Xiaolei Yang 

机构地区：[1]The State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Theoretical & Applied Mechanics Letters》2022年第1期35-41,共7页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)Basic Science Center Program for“Multiscale Problems in Nonlinear Mechanics”(No.11988102);NSFC(No.12002345);China Postdoctoral Science Foundation(No.2020M680027)。

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.

关 键 词：Multi-fidelity model Large-eddy simulation Immersed boundary method Actuator disk model DARPA suboff 

分 类 号：U674.941[交通运输工程—船舶及航道工程]