SIMULATION OF BLEED AIR BEHAVIOR DURING AIRCRAFT IN FLIGHT BASED ON FLOWMASTER

Bleed air system is one of the most important components of air management system(AMS).It acts as transfer pipes responsible for air supply at high temperature and pressure.The thermal and flow performance of the bleed air system is a key issue for the design of AMS since the characteristics of air source have a great influence on the anti-ice system,the environmental control system and other downstream system in need of high temperature pressurized air.Based on the one-dimensional lumped parameter technology,a computer analysis model of bleed air system is developed in order to analyze the thermal and flow behaviors of the nodal points in the pipeline network.The simulation are performed with a given flight assignment using the analysis model,and the results verify that the system meets the design requirements.     

飞机空气配平系统应力补偿及校核分析

以某型飞机空气配平系统为研究对象,在分析空气导管结构布置、工作条件、材料物性等基础上,基于梁单元应力计算软件CAEPIPE对导管系统应力和位移分布进行仿真,并据此进行补偿设计与优化.同时,对于支撑部件等应力集中区采用MD NASTRAN有限元分析软件进行三维应力校核,获得关键部位的三维应力分布云图.该研究工作对于我国飞机空气导管系统的设计优化具有参考价值.     

利用FDAMS系统进行故障分析

在航空器维修过程中，对出现的故障能否及时准确地判断是非常关键的。传统的方法因受客观条件的制约会在很大程度上影响排放效率，给保障航班正常和飞行安全带来很大的难度。这里介绍一种根据飞行数据判断和分析故障的方法，即利用FDAMS系统进行故障分析，其实质就是通过采集并处理故障发生当时的真实数据，分析各参数的变化情况和变化趋势，从而找出问题的根源，对症下药。这种方法能较好地解决盲目排故和排放效率低的问题。从我公司对B737飞机的维修实践来看，将FDAMS系统引入监控和排放过程，可以收到事半功倍的效果。一、FDAMS系…