We explore the extent to which imaging of the melt plume during High Pressure Gas Atomisation using consumer DSLR (Digital Single Lens Reflex) equipment provides useful information about the process. We show that the colour imaging and high spatial resolution can be a useful adjunct to the more widely reported imaging using specialist high frame rate cameras. With knowledge of the camera’s colour response curves, the ratio of the signals in the red, green and blue channels can be used to make spatially resolved temperature estimates of the material within the melt plume. Moreover, by combining these temperature estimates, which depend only upon intensity ratios, with the actual intensity of the optical signal we propose it is possible to obtain estimates of the relative surface area of the melt within the plume. This in turn can be related to the extent of melt break-up with the atomization plume.

中文翻译：

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液态金属高压气体雾化过程中的原位熔体温度和粒度分析

我们探讨了使用消费 DSLR（数字单镜头反光）设备在高压气体雾化过程中对熔体羽流进行成像可在多大程度上提供有关该过程的有用信息。我们表明，彩色成像和高空间分辨率可以成为使用专业高帧率相机进行更广泛报道的成像的有用辅助。了解相机的颜色响应曲线后，红色、绿色和蓝色通道中的信号比率可用于对熔体羽流内的材料进行空间分辨温度估计。此外，通过将这些仅取决于强度比的温度估计值与光信号的实际强度相结合，我们建议可以获得羽流内熔体相对表面积的估计值。这反过来又与雾化羽流的熔体破碎程度有关。