本文選題：穩(wěn)定性 + 法向磁場(chǎng)　； 參考：《華北電力大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年01期

【摘要】：導(dǎo)電流體在外置靜態(tài)磁場(chǎng)作用下流動(dòng)時(shí),其流動(dòng)特性會(huì)發(fā)生改變,進(jìn)而使流體流動(dòng)的穩(wěn)定性更難以預(yù)測(cè)。采用非正則模態(tài)穩(wěn)定性分析方法和數(shù)值模擬技術(shù),研究了法向磁場(chǎng)作用下壁面導(dǎo)電率不同時(shí)平行平板內(nèi)導(dǎo)電流體的流動(dòng)穩(wěn)定性。通過(guò)建立并求解擾動(dòng)變量的原始和伴隨控制方程組,考察了平板導(dǎo)電和平板絕緣情形下初級(jí)擾動(dòng)的增長(zhǎng)特征及其空間分布形式。結(jié)果表明,平板導(dǎo)電(Ha≥7)和平板絕緣(Ha≥8)情形下最優(yōu)擾動(dòng)增長(zhǎng)倍數(shù)Gmax和局部雷諾數(shù)R的關(guān)系分別為Gmax≈5.34×10-4R2和Gmax≈6.12×10-4R2,相應(yīng)的最優(yōu)展向波數(shù)βopt與哈特曼數(shù)Ha成正比;平板導(dǎo)電時(shí)的擾動(dòng)增長(zhǎng)特征及其空間分布與平板絕緣情形下基本類似;但在平板導(dǎo)電條件下,磁場(chǎng)對(duì)擾動(dòng)的抑制效果更明顯。
[Abstract]:When a conducting fluid flows under an external static magnetic field, its flow characteristics will change, which makes the stability of fluid flow more difficult to predict. The flow stability of conducting fluid in parallel plate with different wall conductivity under normal magnetic field is studied by using irregular modal stability analysis method and numerical simulation technique. By establishing and solving the original and adjoint governing equations of disturbance variables, the growth characteristics and spatial distribution of primary disturbances in the case of plate conduction and plate insulation are investigated. The results show that the relationship between the optimal disturbance growth factor (Gmax) and the local Reynolds number R is Gmax 鈮，

本文編號(hào)：1842329