变压差气道稳流试验台的应用

Application of Test Rig of Port Steady Flow with Variable Pressure Drop

气道性能(涡流强度、流量系数)对发动机的动力性、经济性和排放有重要影响。气道稳流试验台是目前最常用的综合评价进气道流动特性的实验装置,根据测量方法的区别可分为变压差和定压差。其中变压差试验方法相对于传统的定压差试验,具有快捷、高效的特点,减少气道稳流试验中的调整气道压差为恒值的操作程序。本文基于TUST-101气道稳流试验台的实际应用,对比了2种试验方法的差异,并根据实际应用对试验台进行部分改进以提高精度。

Port performance （swirl ratio, flow coefficient） has important influence on power, economy and emission of engine. Port steady flow test rig is a common experimental equipment for comprehensively evaluating flow characteristics of port. The port steady flow test includes variable pressure drop and constant pressure drop tests depend on various measuring methods. The method with variable pressure drop is more efficient than the other, because of eliminating a process in which the pressure drop is adjusted to be constant. The follows based on the application of the TUST- 101 port steady flow test rig, indicates the difference between the two steady flow test methods, and also makes some modifications in the test rig for improving the measurement precision.