流体网络法在发动机空气冷却系统设计中的应用  

Study on application of fluid network into the design of air system in engine

作　　者：陶智[1] 侯升平[1] 韩树军[1] 丁水汀[1] 徐国强[1] 吴宏伟[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室,北京100191

出　　处：《航空动力学报》2009年第1期1-6,共6页Journal of Aerospace Power

基　　金："凡舟"青年科研基金(GrantNo.20070401)

摘　　要：将一维稳态流体网络方法应用到发动机空气冷却系统沿程压力、温度和流量预测中.该方法将空气系统简化为节点和元件组成的网络,节点和元件处建立守恒方程,在压力修正、流热耦合方法基础上引入系数迭代修正求解.程序应用到有经验关联式的模型中验证,计算结果与经验关系式吻合得较好.验证后的程序被应用到某发动机空气系统初步设计方案的校核和改进中,在模拟结果指导下的参数调整很好地满足了设计要求.A new program was developed to predict the pressure, temperature and mass flow rate of the flow in engine. The air system was simplified into a fluid network comprised of nodes and elements. One-dimensional conservation equations were solved by a method of combination of pressure-correction method, fluid-thermal coupled method and coefficient- correction method. The program was validated through a model with an empirical formula, and the results showed good agreement with the empirical formula. Then the program was used to verify and improve the preliminary design scheme of a jet engine. Results show that the adjusted design parameters obtained with the help of simulation results are satisfactory.

关 键 词：流体网络 稳态 压力修正 元件 节点 

分 类 号：V228.3[航空宇航科学与技术—飞行器设计]