基于FLUENT的实尺度两栖车辆航行阻力的数值模拟

Numerical Simulation of the Actual Size Amphibious Vehicle Resistance Based on FLUENT Software

为了评价两栖车辆的水上性能,采用目前广泛应用的计算流体力学软件FLUENT对某两栖车辆的航行阻力进行了数值模拟.基于流体力学的相关知识,结合k-ε模型,求解了Navier-Stokes方程,运用VOF法对自由液面进行了处理,并对计算对象进行了详细试验.通过大量的试算,选取了一个合适的湍流模式,并确定了湍流参数.将计算结果与模型试验结果进行比较,验证了计算方法的可靠性.

In order to evaluate the waterborne performance of amphibious vehicle, the commercial computational fluid dynamics software FLUENT widely adopted was applied to simulate the resistance of the actual size amphibious vehicle. Based on related fluid dynamics knowledge, Navier-Stokes equations was solved with the k-s turbulence model, and the free surface was processed by using VOF （Volume of Fluid） method. The calculating model was a amphibious vehicle which has been tested by a lot of detailed experiments. Through a lot of experiments, a appropriate turbulence model was selected and its turbulence parameter was determined. The reliability of computing method was validated by comparing the calculation results with the test data.