飞机燃油箱冲洗与洗涤惰化技术比较分析  

Comparative Analysis of Fuel Washing and Scrubbing in Aircraft Fuel Tank

作　　者：汪明明[1] 冯诗愚[1] 蒋军昌[2] 刘苏彦[2] 刘小芳[1,3] 刘卫华[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016 [2]中国一航第一飞机设计研究院动力燃油设计研究所,西安710089 [3]安徽工业大学冶金与资源学院,马鞍山243002

出　　处：《南京航空航天大学学报》2010年第5期614-619,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：航空科学基金(2007ZC52038)资助项目;611航空科研基金资助项目

摘　　要：在温度和压力为定常边界条件下,采用数值积分方法,建立了燃油冲洗和洗涤的数学模型,将模型计算结果与国外发表的实验数据进行了比较,验证了该模型的正确性;其次,考虑载油率和富氮气体流率等因素的影响,比较分析了冲洗和洗涤规律,并采用量纲一方法得出了更一般性的结论。研究结果表明,与冲洗相比,洗涤能显著减少燃油中含氧量,并且缩短了含氧量达到稳定的时间。在相同惰化效果下,冲洗和洗涤所需要的绝对体积置换次数与载油率呈线性关系;气相氧浓度高于10%时,洗涤惰化效果不如冲洗,相同惰化效果的洗涤耗气量相对要高。但是氧浓度低于10%时,则相反。随着载油率的增加,这种差距愈加明显。研究结果为飞机燃油箱惰化系统设计提供理论依据。Under the constant temperature and pressure boundary conditions,mathematical models of fuel washing and fuel scrubbing are established based on a numerical integration method.Firstly,the validity of the models is verified by comparing the calculated results with the experimental data published in foreign literatures.Secondly,considering the influences of several factors,such as fuel load and nitrogen-enriched air（NEA） flow rate,the comparative analysis of fuel washing and fuel scrubbing is conducted,and a more general conclusion is obtained by non-dimensional method.Results show that,compared with fuel washing,fuel scrubbing can significantly reduce the oxygen concentration in the fuel,and shorten time required for oxygen concentration achieving the stable state.At the same effect of inerting,the absolute volumetric tank exchange（VTE） of fuel washing and scrubbing is linear to the fuel load.If the oxygen concentration on the ullage is more than 10%,the inerting effect of fuel scrubbing is poor than that of fuel washing and the NEA consumption is higher.However,when it is less than 10%,the situation is contrary.In addition,the difference becomes more apparent with the increase of fuel load.The research provides a theoretical foundation for the design of the aircraft fuel tank inerting system.

关 键 词：油箱惰化 燃油冲洗 燃油洗涤 体积置换次数 机载制氮系统 

分 类 号：V228[航空宇航科学与技术—飞行器设计]