Boundary layer transition detection by luminescence imaging
Boundary layer transition detection by luminescence imaging
复制标题
通过发光成像检测边界层跃迁
DOI：
10.2514/6.1993-177
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
J. Callis
中科院分区：
文献类型：
--
作者：
B. Mclachlan;J. Bell;J. Gallery;M. Gouterman;J. Callis
在最近的实验中，我们已经证明了一种新的边界层转折检测方法的可行性。这种新的方法利用某些光致发光材料表面涂层或涂料形式的温度依赖性，来检测伴随边界层转变的热传递特性的变化。在二维翼型和平板布局上进行了低亚、跨声速马赫数的可行性实验。确定了油漆衍生的过渡位置，并与Preston压力探头测量得到的位置进行了比较。模型的人工加热被用来获得适合于我们可用的仪器的转变温度特征。然而，初步估计表明，高马赫数下的被动动能加热是一种很有前途的替代方案。
In recent experiments we have demonstrated the feasibility of a new approach to boundary layer transition detection. This new approach employs the temperature dependence of certain photoluminescent materials in the form of a surface coating or 'paint' to detect the change in heat transfer characteristics that accompany boundary layer transition. The feasibility experiments were conducted for low subsonic to transonic Mach numbers on two-dimensional airfoil and flat plate configurations. Paint derived transition locations were determined and compared to those obtained from Preston pressure probe measurements. Artificial heating of the models was used to obtain transition temperature signatures suitable for the instrumentation available to us. Initial estimates show, however, that passive kinetic heating at high Mach numbers is a promising alternative.