Imaging Analysis of Turbomachinery Internal Flows Using Pressure and Temperature Sensitive Paints

我们开发了一种双层压敏涂料(PSP)/温敏涂料（TSP），用于测量低表压下的低速流量。由于PSP和TSP能够实现非侵入式成像测量，因此强烈希望将该技术应用于与工业和家用涡轮机械相关的内部流量测量。但是，在低压条件下应用PSP，必须解决PSP在低压条件下压力灵敏度低和温度分布不均匀引起的测量误差等问题。双层PSP/TSP利用TSP组件测得的温度分布对PSP组件进行温度补偿。在本研究中，利用双层PSP/TSP可以定量地观察到在温度分布不均匀、差0.4℃的平板上与低速射流相互作用的800Pa小压差。

We have developed a dual-layer pressure sensitive paint (PSP)/temperature sensitive paint (TSP) for measurement of low-speed flows with low gauge pressure. Because PSP and TSP enable non-intrusive imaging measurement, application of the technique to measurement of internal flows related to turbomachinery for industrial and home use is strongly desired. However, problems of PSP related to low pressure sensitivity in low gauge pressure and measurement error caused by non-uniform temperature distribution must be solved for application of PSP in low gauge pressure conditions. Dual-layer PSP/TSP enables the temperature compensation of the PSP component by using temperature distribution measured by the TSP component. In this study, small pressure difference as 800Pa on a flat plate with non-uniform temperature distribution with the difference of 0.4 deg C interacting with a low-speed jet can be visualized quantitatively by using the dual-layer PSP/TSP.