航空发动机空气流量测量与计算方法研究

Research on the Aero-engine Airflow Measurement and Calculation Method

空气流量是航空发动机重要的控制参数,利用进气道测量耙获得发动机空气流量是目前国内外常用的方法之一。本文首先对进气道测量耙系统进行了分析和研究,建立了发动机空气流量与附面层位移厚度的数学模型及空气流量的误差数学模型;然后对空气流量测量误差的主要来源进行了分析研究;最后,在某型发动机的飞行试验中运用了本文的测量与计算方法。试验结果表明:本文提出的航空发动机空气流量测量与计算方法能较准确地获得空气流量值,具有很好的工程应用前景。

Airflow rate is an important control parameter of aero-engine.It is one of the common methods to determine aero-engine airflow rates using inlet measurement rake.First,aero-engine inlet measurement rake systems is analyzed in this paper,the aero-engine airflow rate and boundary layer displacement thickness and error determination math model are established.Then,the main source of airflow measurement errors is analyzed.The test results show that the aero-engine airflow measurement and calculation method are useful and have a good engineering application foreground.