本文選題：計算流體力學(xué) + 重疊網(wǎng)格��； 參考：《航空學(xué)報》2016年03期

【摘要】：高度自動化的洞面優(yōu)化方法是重疊網(wǎng)格關(guān)鍵技術(shù)之一。通過對割補法的分析,針對其洞面切割后洞邊界位置不確定性及不可預(yù)知性問題,提出將其與物面距離優(yōu)化準(zhǔn)則相結(jié)合的新型混合洞面優(yōu)化方法。該方法針對各物體間體網(wǎng)格,采用物面距離優(yōu)化準(zhǔn)則,將洞邊界位置控制在物體中間的位置,使重疊區(qū)域更合理、可預(yù)測;針對背景網(wǎng)格,將其物面距離設(shè)置為較大值,采用物面距離優(yōu)化準(zhǔn)則將其落入物體網(wǎng)格內(nèi)部的單元一并挖去;針對物面處重疊的網(wǎng)格,采用割補法對其進行切割和填補,保證物面及近壁面網(wǎng)格得以有效的重疊。該方法在保證高適用性的前提下提高了網(wǎng)格重疊質(zhì)量,自動化程度高,無需人工干預(yù)。3個典型復(fù)雜流動算例計算結(jié)果與實驗結(jié)果吻合良好,網(wǎng)格重疊區(qū)域流場變量傳遞正確,等值線過渡光滑,流場刻畫準(zhǔn)確,證明該方法準(zhǔn)確可靠。
[Abstract]:The highly automated method of hole surface optimization is one of the key technologies of overlapping mesh. Based on the analysis of the cutting and complement method, a new mixed cavity surface optimization method is proposed, which combines the uncertainty and unpredictability of the hole boundary position after the hole surface cutting with the object surface distance optimization criterion. In this method, the boundary position of the hole is controlled in the middle of the object by using the optimization criterion of the distance between the objects, which makes the overlapping area more reasonable and predictable, and the distance of the object surface is set to a larger value for the background grid. The object surface distance optimization criterion is used to dig out the elements which fall into the mesh of the object, and the cutting and filling method is used to cut and fill the overlapping mesh in the object surface to ensure the effective overlap between the object surface and the near wall mesh. On the premise of high applicability, the method improves the quality of mesh overlap, has high degree of automation and does not require manual intervention. The results of three typical complex flow examples are in good agreement with the experimental results, and the flow field variables in the overlapping area of the grid are transferred correctly. The method is proved to be accurate and reliable because of the smooth transition of the isoline and the accurate description of the flow field.
【作者單位】： 北京航空航天大學(xué)航空科學(xué)與工程學(xué)院;中國科學(xué)院超級計算中心;
【分類號】：O35

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