旋转对邱克拉斯基结构内双组分溶液流动稳定性的影响
发布时间：2018-09-02 08:19
【摘要】：为了了解晶体和坩埚旋转对具有水平温度梯度的邱克拉斯基(Czochralski)结构液池内双组分溶液热毛细-浮力对流的影响,以质量分数为50%的正癸烷/正己烷双组分溶液为工质进行了一系列实验。结果表明,当晶体/坩埚单独旋转时,随着晶体转速增加,旋转首先会抑制流动失稳,然后促进失稳,失稳后的振荡主频逐渐增大;坩埚单独旋转会抑制流动失稳,失稳后的振荡主频随坩埚转速增加先减小、后增大,相同条件下双组分溶液比纯工质易于失稳。当晶体/坩埚同时旋转时,随着晶体转速增加,同向旋转时主频逐渐增大,反向旋转时主频先减小、后增大。
[Abstract]:In order to understand the effect of crystal and crucible rotation on the hot capillary buoyancy convection in a two-component solution in a (Czochralski) structure with a horizontal temperature gradient. A series of experiments were carried out with 50% n-decane / n-hexane two-component solution as working medium. The results show that when the crystal / crucible rotates alone, with the increase of the rotation speed of the crystal, the rotation will first restrain the flow instability, then promote the instability, and the main frequency of oscillation will increase gradually after the instability, and the rotation of the crucible alone will restrain the flow instability. After instability, the main frequency of oscillation decreases at first and then increases with the increase of crucible speed. Under the same conditions, the stability of two-component solution is easier than that of pure working fluid. When the crystal / crucible rotates at the same time, the main frequency increases gradually with the increase of the rotation speed of the crystal, while the main frequency decreases first and then increases in the reverse rotation.
【作者单位】： 重庆大学动力工程学院院低品位能源利用技术及系统教育部重点实验室;
【基金】：国家自然科学基金资助项目(No.51406019) 重庆市研究生科研创新项目(No.CYB15015)
【分类号】：O781
，
本文编号：2218795
[Abstract]:In order to understand the effect of crystal and crucible rotation on the hot capillary buoyancy convection in a two-component solution in a (Czochralski) structure with a horizontal temperature gradient. A series of experiments were carried out with 50% n-decane / n-hexane two-component solution as working medium. The results show that when the crystal / crucible rotates alone, with the increase of the rotation speed of the crystal, the rotation will first restrain the flow instability, then promote the instability, and the main frequency of oscillation will increase gradually after the instability, and the rotation of the crucible alone will restrain the flow instability. After instability, the main frequency of oscillation decreases at first and then increases with the increase of crucible speed. Under the same conditions, the stability of two-component solution is easier than that of pure working fluid. When the crystal / crucible rotates at the same time, the main frequency increases gradually with the increase of the rotation speed of the crystal, while the main frequency decreases first and then increases in the reverse rotation.
【作者单位】： 重庆大学动力工程学院院低品位能源利用技术及系统教育部重点实验室;
【基金】：国家自然科学基金资助项目(No.51406019) 重庆市研究生科研创新项目(No.CYB15015)
【分类号】：O781
，
本文编号：2218795
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