摘要
飞行时机舱气压的急剧变化会导致中耳气压伤,为减轻其伤害,提出一种仿咽鼓管的耳部压力平衡调节技术,并据此设计飞行耳塞:设计仿咽鼓管通道的耳塞管道;利用上下浮动的球阀模仿咽鼓管自启闭功能。设定鼓膜外侧气压和气速的变化作为评价耳塞效果的指标,运用软件对飞机起降时气压和气速的变化进行数值模拟,并搭建实验平台对3D打印的耳塞模型进行实验观察上述变化。仿真和实验均验证了耳塞中的球阀对气压的调节和对气速的限制上的重要性,以及耳塞模仿咽鼓管设计的正确性。
Rapid changes of the cabin pressure can cause Middle Ear Barotrauma during flight. To reduce this, an ear pressure balance adjustment technology is proposed. The technology is about the design of a flying earplug: with an imitated-Eustachian Tube earplug pipe and a ball valve inside. The ball valve floats up and down in the pipe in order to simulate the self-opening and closing function of the Eustachian Tube. Changes of the air pressure and the gas velocity outside the Tympanic Membrane are the indexes to evaluate the effects of the earplug. The changes when the plane taking off and landing are simulated in Fluent. Besides, by 3 D-printing technology, the earplug models are made, and tested in simple experiments to observe the changes. Simulations and experiments reveal the importance of the ball valve in regulating air pressure and limiting gas velocity. Meanwhile, the correctness of the design of the earplug to mimic Eustachian tube is verified.
作者
张智敏
刘亚俊
梁卫平
张青
ZHANG Zhi-min;LIU Ya-jun;LIANG Wei-ping;ZHANG Qing(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou,Guangdong 510640;Key Laboratory of Polymer Processing Engineering of Ministry of Education,Forming,South China University of Technology,Guangzhou,Guangdong 510640)
出处
《液压与气动》
北大核心
2019年第12期125-131,共7页
Chinese Hydraulics & Pneumatics
关键词
中耳气压伤
飞行耳塞
气压调节
仿咽鼓管
球阀
middle ear barotrauma
flying earplug
pressure adjustment
imitated-eustachian tube
ball valve
