Model of Airflow Field on the Deck for Shipborne Helicopter Flight Dynamics Analysis

作     者：Hu Guocai Xu Guang Wang Yunliang Liu Shuyan 

作者机构：Department of Airborne Vehicle Engineering Naval Aeronautical and Astronautical University Yantai 264001 P.R. China Troops 92074 PLA Ningbo 315000 P. R. China 

出 版 物：《Transactions of Nanjing University of Aeronautics and Astronautics》 (南京航空航天大学学报（英文版）)

年 卷 期：2017年第34卷第5期

页      面：567-577页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the Aviation Science Fund(20145784010) 

主　　题：shipborne helicopter flight dynamics airflow field on the deck time-space characteristics sea condition 

摘      要：For the research of helicopter/ship dynamic interface,the method of combining steady flow and stochastic flow is adopted to establish a flow field model applied to the flight dynamics analysis of shipborne *** steady flow is calculated by computational fluid dynamics(CFD)method,while the stochastic flow is composed of the compensation velocity derived from ship motion and turbulence above the *** accuracy of the proposed flow field model is verified by comparing the helicopter response in the proposed flow field with the results calculated by US Army′s Military Specifications(MIL)model which is commonly used in ***,it also shows the proposed flow field model is more appliable to flight dynamics analysis of shipborne *** that the basis,ship deck flow field is simulated at different sea conditions by adjusting the wind speed on the deck,mother ship movement and shipboard turbulence,*** helicopter angular rate response is *** results show that the difference of dynamic stability between helicopter′s roll and pitch leads to the facts that the influence of above factors on the helicopter′s roll angular rate response is greater than that of pitch angular rate,that the frequency and amplitude of mother ship roll motion are much greater than those of pitch motion,and that the disturbance caused by roll motion on the air has greater influence on the helicopter *** shipboard turbulence is the main disturbance factor that influences helicopter flight stability and its intensity determines the amplitudes of angular rate response.