为了准确显示焰流温度随喷涂距离的变化，同时建立了三维红外测温图，如图所示。从图中可以看出，马赫锥中心处温度相较于周边区域高150 K左右（最高可达1080 K），喷枪出口处焰流的温度在800-1080 K之间波动，并在喷涂距离100 mm后开始快速下降。

In order to accurately show the variation of flame flow temperature with the spraying distance, a three-dimensional infrared thermogram was also established, as shown in Figure 7. From the figure, it can be seen that the temperature at the center of the Mach cone is about 150 K higher compared to the surrounding area (up to up to 1080 K), the temperature of the flame stream at the gun outlet fluctuates between 800 and 1080 K, and starts to drop rapidly after a spraying distance of 100 mm.