Hydrodynamic Resistance analysis of New Hull Design for Multipurpose Amphibious Vehicle Applying with Finite Volume Method

Abstract

This paper numerically investigated the hydrodynamic resistance of Multipurpose Amphibious Vehicles (MAV) in three bow shapes to approach the better hull bow shape design. This type of vehicle and other blunt-shaped floating vehicles encounter the problem of a large bow wave forming at high speeds. This wave formation is accompanied by higher resistance and at a critical speed results in bow submergence or swamping. Three new shapes of hull bow design for the multipurpose amphibious vehicle were conducted at several speeds to investigate the hydrodynamic phenomena using Computational Fluid Dynamics (CFD, RANS code) which is applied by Ansys-CFX14.0 and Maxsurf. The vehicle’s hydrodynamic bow shapes were able to break up induced waves and avoid swamping. Comparative results with the vehicle fitted with U-shape, V-shape and Flat-shape of hull bow, showed that the U-shape of the hull bow has reduced the total resistance to 20.3% and 13.6% compared with the V-shape and flat shape respectively. Though, the U-shape of hull bow is capable to increase the amphibious operating life and speed of vehicle in calm water. Also it has ability to reduce the vehicle’s required power, fossil fuel consumption and wetted hull surface.

Influence of a walking mechanism on the hydrodynamic performance of a high-speed wheeled amphibious vehicle

“…High-accuracy hydrodynamic evaluation of the planned hull using CFD technology was studied (Sukas et al, 2017). The resistance of a multipurpose amphibious vehicle was studied using CFD techniques with Reynolds-averaged Navier-Stokes (RANS) model, which gives the viscous flow field around the hull (Nakisa et al, 2014). The CFD software STAR-CCM+ was used for the resistance prediction of an armored personnel carrier (APC) called BTR-80 (Islam et al, 2018).…”

Investigation on trim control of semi-planing amphibious cargo truck using experimental and numerical approaches

“…However, the rapidity is usually limited by the shape of amphibious vehicles, such as bluntshape, which has poor hydrodynamics on water. In order to solve this problem, Adi Maimun et al 2,3 designed three shapes of hull bow for Multipurpose Amphibious Vehicle and used computational fluid dynamics (CFD) to study the resistance performance. They demonstrated that the U-shaped hull bow could reduce the total resistance by 20.3% and avoid swamping by water.…”

Numerical estimation of shallow water effect on multipurpose amphibious vehicle resistance

“…On the other hand, most of these amphibious vehicles are designed for land operations only and their operations in water are limited to passing through rivers safely at a specified speed without satisfying floatation requirements. Therefore, the floatability and stability requirements of these vehicles are optional features required only for shallow water river operations (Nakisa, et al 2015).…”