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本文提出同点双测法——利用二维激光多普勒风速仪在时均稳态流场中进行三维气流速度测量的一种方法。它在原理上可作为三维激光多普勒风速仪的设计基础。文中给出了同点双测法的原理及数据处理的计算关系,并给出了对此方法的实验验证方案,以及运用此方法在一蒸发管式燃烧室模型中测得的数据示例,最后讨论了这一方法的适用条件。结果表明,同点双测法在所讨论的适用条件下是切实可行的,它的价值在于可应用二维激光多普勒风速仪对稳态气流进行非接触的三维速度测量。
In this paper, a co-location double test method is proposed - a method of 3D gas flow velocity measurement in a time-averaged steady-state flow field by using a two-dimensional laser Doppler anemometer. It can in principle be used as a 3D laser Doppler anemometer design basis. In this paper, the principle of double-point co-occurrence method and the calculation of data processing are given. The experimental verification scheme of this method is given, and the data measured by this method in an evaporative tube combustion chamber model are discussed. Finally, The applicable conditions of this method. The results show that the same point double measurement method is feasible under the applicable conditions discussed, and its value lies in the non-contact three-dimensional velocity measurement of the steady-state gas flow by using a two-dimensional laser Doppler anemometer.