基于相似理论建立了垂直缝隙式浇注系统充型过程的流体力学模型,并对低压铸造条件下利用此类浇注系统生产圆筒铸件时的充型状态进行了水模拟和数值模拟研究。结果表明,垂直缝隙式浇注系统难以实现平稳的逐层顺序充填效果,在充型初期液体首先沿立筒上升一段距离,并以类似顶注的方式进入铸型,容易导致液面翻腾和气体卷入,并在型腔中产生环流现象,造成铸型局部过热使得凝固温度场分布不合理,从而严重恶化铸件质量。 Based on the similarity theory, the hydrodynamic model of the filling process of vertical slotted gating system is established. The filling and filling conditions of the cylindrical casting under the condition of low pressure casting are simulated by water and numerical simulation. The results show that it is difficult to achieve a smooth layer-by-layer filling effect in vertical slotted casting system. In the initial stage of filling, the liquid firstly rises a certain distance along the vertical shaft and enters into the mold in a similar top-pouring manner, which easily leads to the liquid level tumbling and the gas coil Into, and produce circulation phenomenon in the cavity, resulting in local overheating of the mold makes the distribution of the solidification temperature field is unreasonable, thus seriously deteriorating the quality of castings.