Bubble evolution in the titanium alloy melt under vertical centrifugal field

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY

Engineering Review Pub Date : 2020-04-01 DOI:10.30765/er.40.2.03

Qin‐Qin Xu, Xing Wang, Shi-ping Wu

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Abstract

The bubble evolution in the liquid titanium melt under vertical centrifugal field has been studied by the hydraulic experiment simulation. The bubble migration process in the simple and complex cavities, the bubble morphology, bubble dimensional size diversification under different mould rotational speed has been investigated. The results show that the mould wall has a blocking effect on the bubble migration. The bubble migration in the simple cavity deviates from the line between the bubble initial position and the rotation shaft of the casting mould. Also, the bubbles in the complex cavity gather, re-nucleate and form new big ones for the blocking effect of the complex geometry shape on the radial movement of the bubble. The shape of bubbles in both the simple and complex cavity during the migration process is not a perfect sphere, but an elliptical shape. The critical size of bubble released from the bubble generation chamber decreases with the increment of the mould rotational speed. The diameter of the gas bubbles in the simple cavity during the migration process become bigger and bigger for the pressure difference at different positions of the cavity in the vertical centrifugal field.

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钛合金熔体在垂直离心力场作用下的气泡演化

采用水力学实验模拟方法，研究了垂直离心场作用下钛液中气泡的演化规律。研究了不同模具转速下气泡在简单型腔和复杂型腔中的迁移过程、气泡形态、气泡尺寸的变化。结果表明，结晶器壁对气泡的迁移有阻断作用。气泡在简单型腔中的迁移偏离了气泡初始位置和铸模转轴之间的线。此外，由于复杂几何形状对气泡径向运动的阻挡作用，复杂空腔中的气泡聚集、重新成核并形成新的大气泡。在迁移过程中，简单和复杂空腔中的气泡形状都不是完美的球体，而是椭圆形。从气泡发生室释放的气泡的临界尺寸随着模具转速的增加而减小。在垂直离心场中，由于空腔不同位置的压力差，简单空腔中气泡在迁移过程中的直径越来越大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Review ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： Engineering Review is an international journal designed to foster the exchange of ideas and transfer of knowledge between scientists and engineers involved in various engineering sciences that deal with investigations related to design, materials, technology, maintenance and manufacturing processes. It is not limited to the specific details of science and engineering but is instead devoted to a very wide range of subfields in the engineering sciences. It provides an appropriate resort for publishing the papers covering prior applications – based on the research topics comprising the entire engineering spectrum. Topics of particular interest thus include: mechanical engineering, naval architecture and marine engineering, fundamental engineering sciences, electrical engineering, computer sciences and civil engineering. Manuscripts addressing other issues may also be considered if they relate to engineering oriented subjects. The contributions, which may be analytical, numerical or experimental, should be of significance to the progress of mentioned topics. Papers that are merely illustrations of established principles or procedures generally will not be accepted. Occasionally, the magazine is ready to publish high-quality-selected papers from the conference after being renovated, expanded and written in accordance with the rules of the magazine. The high standard of excellence for any of published papers will be ensured by peer-review procedure. The journal takes into consideration only original scientific papers.