The industrial application of nanofluids had been explored by many researchers since nanofluids were proposed. However, there were different opinions on the effect in jet cooling. In this paper, 0.4 vol%, 0.8 vol%, 1.2 vol%, 1.8 vol%, 2.4 vol% Al₂O₃-water, TiO₂-water, SiO₂-water nanofluids and pure water were used as quenching coolants to complete single jet cooling experiments on the free surface of 50 mm high-temperature steel plate. The results showed that using low concentration (0.4–1.2 vol%) nanofluids could significantly improve the maximum heat fluxes, cooling speed peaks, and moving velocities of peaks along the thickness direction compared with pure water. However, the cooling uniformity in the horizontal direction was reduced, especially with high concentration nanofluids (≥1.8 vol%). Through comprehensive comparison, when 1.2 vol% Al₂O₃ + water was used as coolant, the optimal cooling efficiency could be achieved, and cooling speed peaks along the thickness were 8.14%–19.70%, 2.16%–3.48% and 0.74%–1.44% higher than that of pure water respectively.

自从提出纳米流体以来，许多研究者已经探索了纳米流体的工业应用。但是，对于射流冷却的效果有不同的看法。在本文中，Al ₂ O _3-水，TiO _2-水，SiO _2为0.4％，0.8％，1.2％，1.8％，2.4％-水纳米流体和纯水用作淬火冷却剂，以在50 mm高温钢板的自由表面上完成单喷冷却实验。结果表明，与纯水相比，使用低浓度（0.4–1.2体积％）的纳米流体可以显着提高最大热通量，冷却速度峰值以及沿厚度方向的峰值移动速度。但是，水平方向的冷却均匀性降低，特别是对于高浓度的纳米流体（≥1.8vol％）。经过综合比较，当Al ₂ O ₃为1.2vol％时 +水作为冷却剂，可以达到最佳的冷却效率，沿厚度方向的冷却速度峰值分别比纯水高8.14％–19.70％，2.16％–3.48％和0.74％–1.44％。