推导了一种新的非稳态流体网络模拟方法应用到流体系统沿程温度、压力、流量的非稳态特性预测中.本方法将流体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,应用压力修正和微积分方法相结合的综合方法进行模拟.程序应用到NASA的推进剂压缩模型中,并与经验关联式和NASA的程序模拟结果进行了对照,结果吻合地较好,证明了程序的可行性,验证后的程序被应用到航空发动机冷却流路模拟中. A new unsteady state fluid network simulation method is applied to the prediction of unsteady characteristics of temperature, pressure and flow along the fluid system.The method simplifies the fluid system into a network of nodes and components, nodes and components The equations of conservation are established and simulated by a combination of pressure correction and calculus.The program is applied to NASA's propellant compression model and compared with the empirical correlation and NASA program simulation results, , Which proves the feasibility of the program. The verified program is applied to the simulation of the aero-engine cooling flow path.