多旋翼对舰船甲板流场影响数值研究

摘要

In order to study the influence of hovering helicopters on the flow field characteristics around a warship deck,numerical simulation is carried out on the coupling flow field of multiple helicopter rotors and warship using Fluent software.The flow field structure,helicity distribution and turbulent kinetic energy are mainly analyzed under different wind direction conditions.Simulation results show that parameters of flow field around each helicopter rotor couple and affect each other. Crosswind makes the flow field structure more disorderly,and the incoming flow,multiple helicopter rotors and superstructure generate the mixed flow field.Also,the zone of turbulent kinetic energy exceeding the limit covers the whole deck,which is bad for helicopter landing.%为了研究多架直升机同时悬停时对舰船甲板流场特性的影响，采用 Fluent 软件对直升机多旋翼结构和舰船耦合流场进行数值模拟，分析了不同风向工况下的流场结构、螺旋度分布以及湍动能。结果表明：各旋翼周围的流场参数相互耦合、相互影响；侧风的加入使得流场结构更加紊乱，形成来流、多旋翼与上层建筑之间的混合流场；湍动能超限区域覆盖了整个甲板流场，这对于直升机的起降是非常不利的。