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针对后向散射光强特性难以探测远场微气泡尾流的问题,利用矢量Monte Carlo方法对气泡尾流的多层多分散模型中线偏振光入射时后向散射的光强和线偏振度信号进行了仿真。验证了光强信号的“双尖峰”特性,同时发现了线偏振度信号的“双下降速率”特性,根据此特性提出了气泡尾流的线偏振度探测法。与常用的光强探测法相比,该方法的探测距离更远,气泡半径更小,是一种有效的远场微气泡尾流探测法。
In view of the difficulty of detecting the far-field microbubble wake in backscattering light intensity characteristics, the backscattered light intensity and linear polarization signals of the linearly polarized light incident on the multi-layer polydispersion model of the wake in the bubble wake are calculated by the vector Monte Carlo method Simulation. The “double-peak” characteristic of the light intensity signal was verified, and the “double-drop rate” characteristic of the linear polarization signal was found. Based on this characteristic, the linear polarization detection method of the bubble wake was proposed. Compared with the commonly used light intensity detection method, the detection distance of the method is farther and the bubble radius is smaller, which is an effective far-field microbubble wake detection method.