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Visualization of Pressure Field over Rotating Blades Using Pressure Sensitive Foil Technique

机译:使用压敏箔技术可视化旋转叶片上的压力场

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This paper describes a new pressure measurement technique for measuring the pressure over rotating blades of an industrial axial flow fan. The new technique is called the pressure sensitive foil (PS-Foil) technique. In this technique, a very thin aluminum foil is coated with pressure sensitive paint using anodization. The resulting PS-Foil can be stuck on any blade using a very thin layer of silicon. The PS-Foil technique shows a very fast time response like conventional porous anodized aluminum and can be applied to any rotor blade without fabricating the blade from aluminum. The total thickness of the aluminum foil and silicon layer is as small as 200 urn. An intensity based method and prior calibration procedures are used to obtain the calibrated PSP image. The unsteady experimental setup presented here shows that the PS-Foil time response is on the order 30 μs which is close to the conventional porous anodized aluminum method. Two applications are considered here to assess the applicability of this technique. Subsonic jet-plate impingement, and rotating blade of industrial fan. The pressure distribution over the impingement plate at different plate angles, and over the rotating blade at various speeds could be obtained with sufficient spatial resolution.
机译:本文介绍了一种新的压力测量技术,用于测量工业轴流风扇的旋转叶片上的压力。这项新技术称为压敏箔(PS-Foil)技术。在这种技术中,非常薄的铝箔使用阳极氧化技术涂有压敏涂料。可以使用非常薄的硅层将生成的PS箔粘贴在任何刀片上。 PS箔技术显示出非常快的时间响应,就像传统的多孔阳极氧化铝一样,无需铝就可以应用于任何转子叶片。铝箔和硅层的总厚度小至200微米。基于强度的方法和先前的校准程序用于获得校准的PSP图像。此处显示的不稳定实验设置表明,PS箔的时间响应约为30μs,与常规的多孔阳极氧化铝方法相近。这里考虑两个应用,以评估该技术的适用性。亚音速喷射板撞击,以及工业风扇的旋转叶片。可以以足够的空间分辨率获得以不同的板角在冲击板上的压力分布以及以各种速度在旋转叶片上的压力分布。

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