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首页> 外文会议>Combustion Institute conference >Validation experiments for spatially resolvedone-dimensional emission spectroscopytemperature measurements by dual-pumpCARS in a sooting flame
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Validation experiments for spatially resolvedone-dimensional emission spectroscopytemperature measurements by dual-pumpCARS in a sooting flame

机译：用双泵浦火焰中的双泵浦路的空间分辨率尺寸发射光谱体温测量的验证实验

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In this work, an emission spectroscopic (ES) technique for the determination of soot temperatures in an axisymmetric flame is validated against coherent anti-Stokes Raman spectroscopy (CARS) as preparation for a zero gravity measurement campaign. In order to reduce valuable measurement times during the parabolic flights, a setup for spatially resolved one-dimensional measurements along a line has been built up using an imaging spectrometer and a CCD-camera for data acquisition. In order to assess the performance of the ES technique, accurate coherent anti-Stokes Raman scattering (CARS) measurements have been performed at the same conditions. Hereby, great care has to be taken to minimize the known interferences in sooting flames. The non-resonant signal contribution was suppressed by a polarization technique and the signal wavelength was shifted to an interference free region. These modifications are discussed in detail. The temperatures obtained by both methods are in good agreement in most regions of the flame. It turned out that the described approach for ES is an appropriate and robust alternative for measuring temperatures in sooting axisymmetric flames, if more accurate techniques cannot be applied, e.g., during investigations in zero-g parabolic flight experiments.
机译：在这项工作中，烟灰的温度在轴对称火焰测定的发射光谱（ES）技术进行验证，相干反斯托克斯拉曼光谱法（CARS），作为一个零重力测量活动的准备。为了在抛物线飞行期间减少有价值的测量时间，用于沿着线空间分辨的一维测量的设置已经建立起来使用成像光谱仪和CCD摄像头用于数据采集。为了评估对ES技术的性能，精确的相干反斯托克斯拉曼散射（CARS）测量已经在相同的条件下进行。在此，非常小心，必须考虑到烟熏火焰减少已知的干扰。非共振信号贡献是由一个偏振技术和波长被转移到无干扰区域中的信号抑制。这些修改进行了详细讨论。通过这两种方法所得到的温度在火焰的大部分地区基本一致。原来，为ES所描述的方法是用于测量温度的煤烟轴对称火焰适当的和强大的替代方案中，如果不能应用更精确的技术，例如，在零g抛物线飞行实验调查期间。

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