基于图论的燃油管路稳态流动计算方法

基于节点分析法，提出将局部损失并入相应管段的处理方法，推导阻力计算公式，从而得到兼顾沿程和局部损失的稳态流动计算方法。将该计算方法应用于实际的航空发动机燃油管路，采用VB.NET语言编写计算软件；同时，对燃油管路开展三维数值模拟计算。结果表明:局部损失对管路的流量分配影响较大；该计算方法得到的流量分配与数值计算结果趋势吻合很好，差别在±10%。 

Stable hydraulic computation method for fuel pipe system based on the graph theory

Using nodal analysis model,a treatment for evaluating the local losses by merging them into relevant pipes was proposed and equations for computing total losses were deduced.Consequently,a method considering both friction and local losses was developed for stable fuel piping system.Then,it was applied to a practical simplified aero-engine fuel piping system.A software based on this algorithm was developed with VB.NET language.Besides,three-dimensional numerical simulations were conducted for the fuel piping system as well.Results showed that local loss affected the flow distribution a lot and directly determined the results.When solutions of the present method and numerical simulation were compared,they presented well agreement with each other with an error of ±10％.