直升机外挂物投放安全性研究  

Research on Release Safety of Helicopter External Stores

作　　者：毛旭 牛嵩[1] 张威[1] Mao Xu;Niu Song;Zhang Wei(AVIC Helicopter Research and Development Institute,Jingdezhen 333000,China)

机构地区：[1]中国直升机设计研究所

出　　处：《航空科学技术》2019年第6期10-18,共9页Aeronautical Science & Technology

摘　　要：以直升机投放外挂副油箱为例,基于计算流体力学(CFD)方法开展了直升机外挂物投放安全性计算研究。采用动态网格技术模拟外挂物副油箱与直升机的相对运动,计算研究了外挂副油箱空气舵、直升机旋翼下洗流和飞行状态对外挂副油箱投放安全性的影响规律。计算结果表明,增加空气舵有利于外挂副油箱的安全投放,但空气舵并不是越大越好;直升机旋翼下洗流对外挂副油箱投放的影响并不总是正面的,这取决于直升机飞行状态,故其影响不容忽视;而直升机的飞行速度越低、迎角越小、侧滑角绝对值越小,越有利于外挂副油箱的安全投放。Using external tank separation from helicopter as example,numerical calculation was proposed to analyze release safety of external stores based on the CFD method.Dynamic mesh technique was used to simulate the relative motion between external tank and helicopter,and the influence regularity of rudder,main-rotor downwash flow and the flight states of helicopter on release safety of external tank were calculated.The results indicate that the rudder is advantageous to release safety of external tank,but not that the bigger size of rudder is better.The influence of main-rotor downwash flow on release safety of external tank is not always positive,and depending on the flight state,thus the main-rotor cannot be ignored.In addition,the smaller the flight speed,angle of attack,absolute value of sideslip angle of helicopter,the better for the release safety of external tank.

关 键 词：外挂副油箱 投放 安全性 动态网格 直升机 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]