推进剂供应管道的集中参数近似模型研究——模态近似模型

STUDY ON LUMPED PARAMETER APPROXIMATION MODELS OF DISTRIBUTED PROPELLANT FEEDLINES ——MODAL APPROXIMATION MODELS

提出了用模态近似法建立分布参数湍流管道的集中参数近似模型的新方法，发展了适用于水力和绝热气体湍流管道的两种模态近似模型：Ｉ－Ｒ－Ｃ模态和等效层流模型。模型中考虑了频率相关摩擦损失。利用单根管道阀门关断问题的仿真计算对本文的模型进行了验证，计算结果与考虑频率相关摩擦损失的特征线方法的计算结果十分吻合。

A new method of modeling distributed parameter turbulent pipes by using modal approximation methodology was presented.Two kinds of modal approximation models for both hydraulic and adiabatic pneumatic turbulent pipes-the I R C and effective laminar flow modal approximation models were developed.Corroboration of models was given by simulated results of a single pipe after valve closure.The calculated results show a good agreement with those using method of characteristics including frequency dependent friction