摘要
适航条款对民用飞机燃油箱内氧气浓度有明确规定,从而对燃油箱富氮气体分配方案的设计提出较高要求。基于燃油箱冲洗惰化理论,以某型飞机燃油箱为例,对燃油箱富氮气体分配方案选型设计方法进行研究。根据燃油箱容积和惰化时间,通过利用单舱燃油箱数学模型计算获得富氮气体需求量;然后利用多隔舱燃油箱数学模型,以简化管路布置为寻优目标获得富氮气体分配方案。使用数学模拟的方法可快速评估富氮气体分配方案性能,特别适用于大量设计参数尚未确定的方案选型设计阶段。
The oxygen concentration in the fuel tank of civil aircraft was prescribed in the airworthiness regula- tion. More attention shall be paid to the fuel tank Nitrogen-Enriched Gas （NEA） distribution scheme design to meet the airworthiness requirement. Based on fuel tank washing inert theory, the type selection design method for fuel tank NEA distribution scheme was introduced in this paper. The type selection design method was presented on a certain type aircraft fuel tank in this paper. The NEA flow could be calculated by using single-compartment fuel tank numerical model with fuel tank volume and inerting time. In order to simplify the tube placement, NEA distri- bution scheme could be designed by using multi-compartment fuel tank numerical model. Numerical simulation method could estimate the performance of NEA distribution scheme quickly, which is very useful for the type selec- tion design phase while many inputs haven＇t been determined.
出处
《民用飞机设计与研究》
2013年第1期48-51,70,共5页
Civil Aircraft Design & Research
关键词
燃油箱惰化
燃油冲洗
惰化气体分配
选型设计
数学模拟
Fuel Tank Inerting
Fuel Washing
Inert Gas Distribution
Type Selection Design
Numerical Simulation
