Vortex tuning of a submarine by Liutex force field model

• Published in: Journal of hydrodynamics. Series B 2021-06, Vol.33 (3), p.503-509
• Main Authors: Cao, Liu-shuai, Chen, Song-tao, Wan, De-cheng, Wang, Yi-qian
• Format: Article
• Language: English
• Subjects: Engineering; Engineering Fluid Dynamics; Hydrology/Water Resources; Numerical and Computational Physics; Simulation; Special Column on the Liutex Force Field Model (Guest Editor De-Cheng Wan)
• ISSN: 1001-6058; 1878-0342
• DOI: 10.1007/s42241-021-0055-3

Vortical structures of a submarine with appendages are fully turbulent and complex. Thus, flow control and vortex manipulation are of great importance for the hydrodynamic performance and acoustic characteristics. Take the generic submarine model DARPA Suboff as the test case, a vortex tuning method based on the Liutex force field is proposed to manipulate the vorticity field. Viscous flow past the submarine model in straight-line motion at a Reynolds number of 1.2×10 7 is achieved by solving the Reynolds averaged Navier-Stokes (RANS) equations. Multi-block structured mesh topology is used to discretize the computational domain, and the shear stress transport (SST) k - ω turbulence model is implemented to close the equations. The control of vortex is achieved by introducing additional source terms based on Liutex vortex definition and identification system to the RANS equations. The resistance acting on the submarine, flow field as well as the vortical structures are compared and analyzed. Results show that Liutex force model can effectively reduce the resistance by 9.31% and change the vortical structures apparently.