(大連理工大學(xué) 材料科學(xué)與工程學(xué)院 三束材料改性國家重點實驗室，大連 116024)
摘 要: 利用先進(jìn)的數(shù)字粒子圖像測速技術(shù)(DPIV)對鋁合金板坯連鑄過程中結(jié)晶器內(nèi)的流場進(jìn)行研究。分析了操作參數(shù)以及浮漂漏斗結(jié)構(gòu)對流場的影響。考慮到液固界面的影響，實驗采用與枝晶生長結(jié)構(gòu)相似的天然海綿模擬液固界面。結(jié)果表明：隨著拉坯速度的增大，表面越不穩(wěn)定；可通過適當(dāng)增加出水口向下的傾角來提高拉速；跑道形出水口要優(yōu)于矩形出水口。
關(guān)鍵字: 鋁合金；連鑄；結(jié)晶器；DPIV；物理模擬
casting of aluminium alloy slab
（State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Materials Science and
Engineering,Dalian University of Technology, Dalian 116024, China）
Abstract:The fluid flow phenomena happened in the mould of continuous casting of aluminium alloy was studied by digital particle image velocimetry (DPIV) technology. The influence of operation parameter and floating distributor structure on flow field was analyzed. Taking into account the impact of fluid-solid interface in experiment, a natural sponge whose micro-structure is similar to dendrite structure was employed to simulate liquid-solid interface. The results show that the faster the polling rate is, the more turbulent free the surface is. The pulling rate can be increased by increasing port angle adequately, and the racetrack ports are better than the rectangular ones.
Key words: aluminium alloy; continuous casting; mould; DPIV; physical simulation
