两型间冷器流道气动性能试验研究

Experimental Research on Aerodynamic Performance in Flow Channel of Two Types of Intercoolers

间冷器是间冷循环燃气轮机的核心部件,气流流过间冷器的压力损失是衡量间冷器性能的主要指标之一。本文设计了两种不同的间冷器流道结构,并对两种间冷器流道进行了不同工况的气动特性试验,测得间冷器流道不同位置的温度、压力值,得出两种间冷器流道结构的气动特性。试验结果表明:间冷器总压损失主要产生于从进口到导流板前的折转扩散段,且总压损失系数随折合流量的变化曲线为抛物线型,与进口动压呈正比例关系;而改进型间冷器的总压损失有所降低,相同折合流量对应的总压损失系数相对原型间冷器结构降低约20%。

The intercooler is the core component of the intercooler cycle gas turbine,and the pressure loss of air flow through the intercooler is one of the main indicators to measure the performance of the intercooler.In this paper,two different intercooler flow channel structures were designed,and aerodynamic characteristic tests were carried out in the two intercooler flow channels under different working conditions.The temperature and pressure values at different positions of the intercooler flow channel were measured,and the aerodynamic characteristics of the two intercooler flow channel structures were obtained.The test results show that the total pressure loss of the intercooler mainly occurs in the turning and diffusing section from the inlet to the"before diversion plate",and the total pressure loss coefficient changes in a parabolic shape with the reduced flow rate,which is proportional to the inlet dynamic pressure;while the improved intercooler has a lower total pressure loss,and the total pressure loss coefficient corresponding to the same reduced flow rate is about 20%lower than that of the original intercooler structure.