关于内燃机进排气系统三分支通用边界模型的探讨

A General Model for Three-way Pipe Boundary in I.C.Engine Intake and Exhaust Manifold

建立一种不依赖于实验数据并具有普遍意义的三分支边界模型一直是模拟计算研究工作者所关注的问题。本文引证并分析了有关压力损失的资料,并根据文献中的结论,在一定范围内将不可压缩流体所得到的总压损失系数应用于可压缩流体的计算。由此所建立的压力损失模型同等压模型组合得到了一个完整的三分支通用模型。与实测数据及等压模型的计算结果比较表明,该模型具有较高的精度。

Based on the analysis of many materials about pressure loss fromreferences,the total pressure loss coefficients obtained from incompressiblefluid tests were applied to compresible fluid within a certain limit.Acomplete model for three-way pipe was established by combining the pres-sure loss model and constant pressure model.Compared with measured dataand the results given by the constant pressure model,this model wasproved to be of higher accuracy.