【摘要】：為了了解晶體和坩堝旋轉(zhuǎn)對具有水平溫度梯度的邱克拉斯基(Czochralski)結(jié)構(gòu)液池內(nèi)雙組分溶液熱毛細-浮力對流的影響,以質(zhì)量分數(shù)為50%的正癸烷/正己烷雙組分溶液為工質(zhì)進行了一系列實驗。結(jié)果表明,當晶體/坩堝單獨旋轉(zhuǎn)時,隨著晶體轉(zhuǎn)速增加,旋轉(zhuǎn)首先會抑制流動失穩(wěn),然后促進失穩(wěn),失穩(wěn)后的振蕩主頻逐漸增大;坩堝單獨旋轉(zhuǎn)會抑制流動失穩(wěn),失穩(wěn)后的振蕩主頻隨坩堝轉(zhuǎn)速增加先減小、后增大,相同條件下雙組分溶液比純工質(zhì)易于失穩(wěn)。當晶體/坩堝同時旋轉(zhuǎn)時,隨著晶體轉(zhuǎn)速增加,同向旋轉(zhuǎn)時主頻逐漸增大,反向旋轉(zhuǎn)時主頻先減小、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.
【作者單位】： 重慶大學動力工程學院院低品位能源利用技術(shù)及系統(tǒng)教育部重點實驗室;
【基金】：國家自然科學基金資助項目(No.51406019) 重慶市研究生科研創(chuàng)新項目(No.CYB15015)
【分類號】：O781
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本文編號：2218795