A 1/17th water physical model of a 200-ton steel ladle furnace with a single gas injection was used to simulate bath heating using a single burner to mimic the heat flux due to electric arcs in the industrial steel ladle. Two phases were considered, using water to simulate the molten steel and air to simulate the argon injection at a flow rate of 1.54 NL min−1. The planar Laser-Induced Fluorescence (PLIF) technique was for the first time experimentally implemented to measure temperature fields in a longitudinal plane of the gas-stirred ladle model. PLIF employs a laser source of 532-nm wavelength to light water seeded with rhodamine B, which emits fluorescence depending on its temperature, after a complex calibration is made. Next, the fluorescence is captured by a camera with a 550-nm wavelength filter. The PLIF measurements were validated by local thermocouple measurements at five different locations in the measurement plane. Temperature fields measured by PLIF are in good agreement with those obtained locally by thermocouples, so the PLIF technique can be used to measure temperature fields with the advantage of getting a complete temperature contour field, in contrast to point values of temperatures with thermocouples. Experiments were carried out to study the thermal mixing for two common tuyere positions, i.e., axisymmetric and eccentric (mid-radius) positions. Results on the injection mode show that axisymmetric gas injection is a more efficient heat transfer configuration between the burner and the liquid phase than is the symmetric injection mode for the particular heating configuration studied in this work.

中文翻译：

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利用平面激光诱导荧光技术 (PLIF) 测量气体搅拌钢包中的温度场

200 吨钢包炉的 1/17 水物理模型用于模拟使用单个燃烧器的熔池加热，以模拟工业钢包中电弧引起的热通量。考虑了两个阶段，使用水模拟钢水和空气模拟以 1.54 NL min-1 的流速注入氩气。平面激光诱导荧光 (PLIF) 技术首次通过实验实施以测量气体搅拌钢包模型纵向平面中的温度场。PLIF 使用 532 nm 波长的激光源来点亮接种有罗丹明 B 的水，在进行复杂校准后，罗丹明 B 会根据温度发出荧光。接下来，荧光由带有 550 nm 波长过滤器的相机捕获。PLIF 测量通过测量平面中五个不同位置的局部热电偶测量进行了验证。PLIF 测量的温度场与热电偶局部获得的温度场非常吻合，因此与热电偶的温度点值相比，PLIF 技术可用于测量温度场，其优点是可以获得完整的温度等高线场。进行了实验来研究两个常见风口位置的热混合，即轴对称和偏心（中半径）位置。注入模式的结果表明，轴对称气体注入是燃烧器和液相之间的更有效的热传递配置，而不是本工作中研究的特定加热配置的对称注入模式。