基于CFD和时间序列的计量活门阀芯压力预测模型

Pressure Prediction Model of Metering Valve Core Based on CFD and Time Series

为描述某活门阀芯处的压力,提出使用CFD技术并结合时间序列分析方法对阀芯处的压力进行建模。对燃油计量系统进行流场仿真,在阀芯处设置monitor以获取压力值;对获取的压力值采用时间序列方法进行分析,建立该序列的ARMA-ARCH模型。使用该模型进行预测并与原始序列对比,结果表明该模型拟合较好。

In order to describe the pressure at the valve core of a valve,the CFD technology and time series analysis method were used to model the pressure at the valve core.The flow field simulation of the fuel metering system was carried out,and monitor was set at the valve core to obtain the pressure value;the ARMA-ARCH model of the obtained pressure was established by using the time se⁃ries method.The model was used to predict and compared with the original sequence.The results show that the model fits well.