Flow dynamic analysis of core shooting process through experiment and multiphase modeling
Flow dynamic analysis of core shooting process through experiment and multiphase modeling
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通过实验和多相建模对岩心射出过程进行流动动力学分析
DOI：
10.1155/2016/2317180
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发表时间：
2016
影响因子：
--
通讯作者：
GaoChun Lu
中科院分区：
文献类型：
--
作者：
Tao Jing;ChangJiang Ni;JunJiao Wu;GaoChun Lu
射芯法是目前应用最广泛的砂芯制造工艺，在金属铸造业中，它对砂芯的质量以及复杂铸件的生产起着至关重要的作用。本文利用透明芯盒、高速摄像机和测压系统，对砂粒在芯盒中的流动行为进行了同步研究。用不同颜色的岩心砂层再现了射芯机射头内砂粒的流态。同时考虑动应力和摩擦应力，建立了描述固相内部动量传递的动摩擦本构关系。在此基础上，采用双流体模型(TFM)和湍流模型对射头和芯盒内砂粒的流动行为进行了数值模拟，模拟结果与实验结果吻合较好。在实验和模拟结果的基础上，从砂粒体积分数(αS)、砂粒速度(Vs)和压力变化(P)三个方面分析了砂粒在芯盒中的流动行为、射头“死区”的形成以及阻力的影响。
Core shooting process is the most widely used technique to make sand cores and it plays an important role in the quality of sand cores as well as the manufacture of complicated castings in metal casting industry. In this paper, the flow behavior of sand particles in the core box was investigated synchronously with transparent core box, high-speed camera, and pressure measuring system. The flow pattern of sand particles in the shooting head of the core shooting machine was reproduced with various colored core sand layers. Taking both kinetic and frictional stress into account, a kinetic-frictional constitutive correlation was established to describe the internal momentum transfer in the solid phase. Two-fluid model (TFM) simulations with turbulence model were then performed and good agreement was achieved between the experimental and simulation results on the flow behavior of sand particles in both the shooting head and the core box. Based on the experimental and simulation results, the flow behavior of sand particles in the core box, the formation of “dead zone” in the shooting head, and the effect of drag force were analyzed in terms of sand volume fraction (αs), sand velocity (Vs), and pressure variation(P).
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影响因子：
3.7
作者：
JOHNSON, PC;JACKSON, R
通讯作者：
JACKSON, R
影响因子：
5.3
作者：
S. Hosseini;G. Ahmadi;Behzad Saeedi Razavi;Wenqi Zhong
通讯作者：
S. Hosseini;G. Ahmadi;Behzad Saeedi Razavi;Wenqi Zhong
影响因子：
5.2
作者：
S. Bakhtiyarov;R. Overfelt
通讯作者：
S. Bakhtiyarov;R. Overfelt
影响因子：
27.7
作者：
van der M.A. Hoef;V. S. Annaland;Ng Niels Deen;J. Kuipers
通讯作者：
van der M.A. Hoef;V. S. Annaland;Ng Niels Deen;J. Kuipers
影响因子：
4.7
作者：
Wenhao Pu;Changsui Zhao;Y. Xiong;C. Liang;Xiaoping Chen;Peng Lu;Chunlei Fan
通讯作者：
Wenhao Pu;Changsui Zhao;Y. Xiong;C. Liang;Xiaoping Chen;Peng Lu;Chunlei Fan