液體可壓縮性對超空化流動的影響
發(fā)布時間:2018-08-23 21:13
【摘要】:基于多相流模型和運動框架模型構建可壓縮超空化流場的數(shù)值計算模型,分別使用具有不同物性的流體介質(zhì)模擬水下跨聲速超空化流動,并將數(shù)值模擬結果與經(jīng)驗公式結果相互參驗,通過對比分析研究在液體可壓縮性對跨聲速超空化流動的影響.研究結果顯示:液體可壓縮性對流動參數(shù)的分布規(guī)律、空化物體的阻力特性和流場的空化情況均有顯著影響;考慮液體可壓縮性,隨飛行速度的增大,射彈的阻力系數(shù)將增加,并且在高速工況下超空泡的尺度大幅度減小;可壓縮超空化流場中,較300m/s工況,速度為1 900m/s時彈體阻力系數(shù)增大約22%,彈尾截面空泡直徑減小約30%.
[Abstract]:Based on the multiphase flow model and the moving frame model, the compressible supercavitation flow model is constructed, and the underwater transonic supercavitation flow is simulated by using different physical fluid media, respectively. The effects of compressibility of liquid on transonic supercavitation flow are studied by comparing the results of numerical simulation and empirical formula. The results show that the compressibility of liquid has a significant effect on the distribution of flow parameters, the resistance characteristics of cavitation objects and the cavitation of flow field, and considering the compressibility of liquid, the drag coefficient of projectile will increase with the increase of flight velocity. In the compressible supercavitation flow field, when the velocity is 1 900m/s, the drag coefficient of the projectile increases by 22 and the cavitation diameter of the tail section decreases by about 30.
【作者單位】: 西北工業(yè)大學航海學院;
【基金】:國家自然科學基金項目(51409215,51579209)資助
【分類號】:O35
本文編號:2199936
[Abstract]:Based on the multiphase flow model and the moving frame model, the compressible supercavitation flow model is constructed, and the underwater transonic supercavitation flow is simulated by using different physical fluid media, respectively. The effects of compressibility of liquid on transonic supercavitation flow are studied by comparing the results of numerical simulation and empirical formula. The results show that the compressibility of liquid has a significant effect on the distribution of flow parameters, the resistance characteristics of cavitation objects and the cavitation of flow field, and considering the compressibility of liquid, the drag coefficient of projectile will increase with the increase of flight velocity. In the compressible supercavitation flow field, when the velocity is 1 900m/s, the drag coefficient of the projectile increases by 22 and the cavitation diameter of the tail section decreases by about 30.
【作者單位】: 西北工業(yè)大學航海學院;
【基金】:國家自然科學基金項目(51409215,51579209)資助
【分類號】:O35
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