本文選題：摩擦系數(shù) + 流動(dòng)壓降��； 參考：《低溫工程》2017年03期

【摘要】：40-T混合磁體外超導(dǎo)磁體使用4.5 K超臨界氦進(jìn)行迫流冷卻。迫流氦在管內(nèi)電纜導(dǎo)體(CICC)內(nèi)的流動(dòng)過(guò)程受到摩擦阻力的影響會(huì)造成一定的壓降和熱量產(chǎn)生,同時(shí)由外界帶來(lái)的熱量也會(huì)由迫流氦帶走來(lái)讓磁體保持在超導(dǎo)溫區(qū)。使用了超導(dǎo)磁體實(shí)際運(yùn)行過(guò)程中的實(shí)驗(yàn)數(shù)據(jù)計(jì)算不同導(dǎo)體結(jié)構(gòu)下雷諾數(shù)與摩擦系數(shù)的變化關(guān)系,利用Katheder經(jīng)驗(yàn)公式對(duì)實(shí)驗(yàn)的摩擦系數(shù)進(jìn)行了重新擬合,給出了適用于該導(dǎo)體摩擦系數(shù)的經(jīng)驗(yàn)公式。
[Abstract]:The superconducting magnet outside the 40-T hybrid magnet uses 4.5 K supercritical helium for forced flow cooling. The flow process of forced helium in the cable conductor CICC in the tube will be affected by friction resistance, which will result in a certain pressure drop and heat generation. Meanwhile, the heat generated by the outside will also be taken away by forced helium to keep the magnet in the superconducting temperature region. The relationship between Reynolds number and friction coefficient under different conductor structures is calculated by using the experimental data of superconducting magnets. The experimental friction coefficient is refitted by Katheder empirical formula. An empirical formula for the friction coefficient of the conductor is given.
【作者單位】： 中國(guó)科學(xué)院強(qiáng)磁場(chǎng)科學(xué)中心;中國(guó)科學(xué)技術(shù)大學(xué);
【基金】：國(guó)家大科學(xué)工程(發(fā)改高技[2007]188號(hào))項(xiàng)目
【分類(lèi)號(hào)】：TB66
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本文編號(hào)：2020808