Numerical and Experimental Evaluation of Waterjet Propelled Amphibious Tracked Vehicles

Taehyung Kim, J. Seo, Y. Heo
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Abstract

This paper covers the numerical and experimental evaluation including vehicle resistance and self-propulsion performance, waterjet flow rate, and running attitude changes of an amphibious tracked vehicle. A reduced-scale model of the waterjet propelled amphibious tracked vehicle was designed by the Agency for Defense Development (ADD) and was tested in the towing tank. The numerical study was performed over a speed range of 0.3
水射流推进水陆两栖履带车辆的数值与实验评价
本文对水陆两栖履带车辆的阻力和自推进性能、水射流流量、行驶姿态变化进行了数值和实验评价。由美国国防发展局(ADD)设计了一种水陆两栖履带车的缩小模型,并在拖曳槽中进行了试验。数值研究采用商业计算流体动力学(CFD)工具提供的二阶精确有限体积方法,在0.3<弗鲁德数(Fn)<0.8的速度范围内求解控制Reynolds平均Navier-Stokes (RANS)方程。采用k-ω模型对箱形飞行器后的湍流闭合和大量分离流进行了分析。采用运动参考系法模拟叶轮的旋转,采用动态体-流体相互作用法预测叶轮的运行姿态。对叶轮阻力、推力和扭矩系数的预测结果吻合较好。通过比较,还可以确定适当的船尾水翼安装角度,以实现较低的轴传递功率和更稳定的高速两栖履带式车辆运行姿态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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