本文關(guān)鍵詞：基于變均布霍爾系數(shù)的磁控?zé)岱雷o(hù)系統(tǒng)霍爾效應(yīng)影響　出處：《物理學(xué)報(bào)》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 磁流體控制 熱防護(hù) 霍爾效應(yīng) 耦合計(jì)算

【摘要】：為研究霍爾效應(yīng)對(duì)磁控?zé)岱雷o(hù)系統(tǒng)的影響機(jī)理,建立并驗(yàn)證了熱化學(xué)非平衡流場(chǎng)、外加磁場(chǎng)、感應(yīng)電場(chǎng)的多場(chǎng)耦合數(shù)值求解方法.基于均布霍爾系數(shù)模型分析了霍爾效應(yīng)在兩種不同磁場(chǎng)強(qiáng)度B_0、不同壁面導(dǎo)電條件下對(duì)磁控效果的影響.研究表明,不同壁面導(dǎo)電性下霍爾效應(yīng)的影響規(guī)律不同.絕緣壁面條件下,考慮霍爾效應(yīng)后壁面熱流的變化是附面層內(nèi)洛倫茲力的變化與激波層厚度的減小二者共同作用的結(jié)果.B_0=0.2 T時(shí)洛倫茲力增加附加的流體減速作用占主導(dǎo),磁控?zé)岱雷o(hù)效果優(yōu)于忽略霍爾效應(yīng)的情況,并且在霍爾系數(shù)為5.0達(dá)到最優(yōu);而當(dāng)B_0=0.5 T時(shí),激波層變薄對(duì)附面層外緣溫度的增加占主導(dǎo),磁控?zé)岱雷o(hù)效果變差,并且隨霍爾系數(shù)的增加壁面熱流越來越大.導(dǎo)電壁面條件下,隨著霍爾系數(shù)的增加,磁控激波以及熱防護(hù)效果變差,且當(dāng)β≥5.0時(shí),磁控?zé)岱雷o(hù)系統(tǒng)幾乎完全失效.
[Abstract]:In order to study the influence mechanism of Hall effect on magnetically controlled thermal protection system, the thermochemical non-equilibrium flow field and external magnetic field were established and verified. The effect of Hall effect on magnetic control effect under two different magnetic field intensities B _ 0 and different wall conductive conditions is analyzed based on the uniform Bouhor coefficient model. The influence law of Hall effect is different under different wall conductivity. The variation of wall heat flux after consideration of Hall effect is the result of both the variation of Lorentz force in boundary layer and the decrease of shock layer thickness. At T, the Lorentz force increases the additional fluid deceleration. The effect of magnetically controlled thermal protection is better than that of neglecting Hall effect, and the optimum is obtained when the Hall coefficient is 5.0. When B _ 0 ~ (0.5 T) T, the thinning of shock layer dominates the increase of boundary temperature, the effect of magnetically controlled thermal protection becomes worse, and with the increase of Hall coefficient, the wall heat flux becomes larger and larger, under the condition of conducting wall. With the increase of Hall coefficient, the effect of magnetically controlled shock wave and thermal protection becomes worse, and when 尾 鈮，

本文編號(hào)：1383564