Quantitative measuring methods applied for the mixing phenomena of film cooling
Quantitative measuring methods applied for the mixing phenomena of film cooling
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DOI：
10.2495/ht140421
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发表时间：
2014-07
期刊：
影响因子：
--
通讯作者：
K. Takeishi;M. Komiyama;Y. Oda
中科院分区：
文献类型：
--
作者：
K. Takeishi;M. Komiyama;Y. Oda
本文介绍了采用压敏漆（PSP）、丙酮激光诱导荧光（LIF）和粒子图像测速（PIV）等定量测量方法对气膜冷却剂与主流复杂混合流场进行测量。在进行精确校准的情况下，使用PSP方法准确测量了时间平均薄膜冷却效率。利用丙酮激光诱导荧光（LIF）和粒子图像测速（PIV）技术，对圆孔出口附近的速度场和气膜冷却效率进行了实时测量。同时测量不仅有助于了解气膜冷却的空间流场，而且有助于验证气膜冷却数值模拟的准确性。
In this paper, the quantitative measuring methods of Pressure Sensitive Paint (PSP), acetone Laser Induced Fluorescence (LIF) and Particle Image Velocimetry (PIV) are presented for the measuring of a complicated mixing flow field of film coolant and a mainstream. The time-averaged film cooling effectiveness was accurately measured with the PSP method, when precise calibration has been conducted. Instantaneous distributions of velocity vectors and film cooling effectiveness were measured simultaneously near the exit of circular hole by acetone LIF and PIV. The simultaneous measurement is very useful not only to clear the spatial flow field of film cooling but also to confirm the accuracy of numerical simulations of film cooling.