A critical CAE analysis of the bottom shape of a multi stepped air cavity planing hull |
| |
| Institution: | 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200040, China;3. Science and Technology on Water Jet Propulsion Laboratory, Marine Design & Research Institute of China, Shanghai, 200011, China;1. Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran;2. Center of Excellence in Energy Conversion, School of Mechanical Engineering, Sharif University of Technology, Tehran 11155-9567, Iran;1. Estonian Maritime Academy, Tallinn University of Technology, Tallinn, Estonia;2. Department of Infrastructure Engineering, The University of Melbourne, Parkville, 3052, VIC, Australia |
| |
| Abstract: | One of the most important aspects, in the ACS and multi stepped hull design, is the choice of the geometrical shape of the cavity and the steps. In this article a complete experimental and numerical campaign on a multi stepped ACS has been carried out, varying the velocity and the air flow rate under the hull. The experimental tests have been conducted in an ITTC Towing Tank allowing to validate the numerical simulations obtained by means of a CFD U-RANSe (Unesteady Reynolds Averaged Navier-Stokes equations) code. The CFD setup is described in detail. From this campaign a critical analysis of the Froude number influence on the air cushion shape has been argued. The authors identified four different behaviours, from low to very high Froude numbers. The use of CFD has allowed to observe quantities of difficult evaluation by means of traditional experimental test, as e.g. the frictional component of the resistance, the airflow path lines and the volume of fraction in transversal and longitudinal sections. The results have been discussed. |
| |
| Keywords: | Computational Fluid Dynamics Air Cavity Ships Hull Design Ship Resistance Multi stepped hull Towing tank tests |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
