本文關(guān)鍵詞： 合成射流 鈍尾緣翼型 數(shù)值模擬 升阻力特性 壓力波動　出處：《機械工程學(xué)報》2016年04期 　論文類型：期刊論文

【摘要】：研究吸力面存在合成射流的情況下,鈍尾緣翼型TR-4000-2000流場結(jié)構(gòu)的變化及其升阻力系數(shù)等氣動特性參數(shù)的變化趨勢。在相同射流入口速度條件下,采用計算流體力學(xué)軟件Fluent對相同來流速度不同攻角情況下翼型流場進(jìn)行非定常數(shù)值模擬計算,分析射流前后翼型升阻力系數(shù)變化及翼型表面壓力的波動狀況;在此基礎(chǔ)上,對不同射流頻率和不同射流速度情況下翼型流場進(jìn)行模擬計算,尋求最佳射流參數(shù)。結(jié)果表明,由于射流及尾緣渦的相互作用導(dǎo)致翼型的升阻力特性不斷變化,鈍尾緣翼型吸力面合成射流有明顯的增升減阻效果,在15°攻角時尤為明顯,升力系數(shù)提高約40%,阻力系數(shù)減小約25%。在量綱一射流速度和量綱一射流頻率均為1時,射流對翼型的增升減阻效果最佳。
[Abstract]:It is studied that there is a synthetic jet on the suction surface. The change of TR-4000-2000 flow field structure and the variation trend of aerodynamic characteristic parameters such as lift resistance coefficient of blunt tail flange flange, under the same jet inlet velocity condition. The unsteady numerical simulation of airfoil flow field with the same incoming velocity and different attack angle was carried out by using computational fluid dynamics software Fluent. The variation of the lift resistance coefficient of the airfoil and the fluctuation of the surface pressure of the airfoil before and after the jet are analyzed. On this basis, the airfoil flow field under different jet frequency and different jet velocity is simulated and calculated to find the best jet parameters. Due to the interaction between jet and trailing edge vortex, the lift resistance of airfoil is constantly changing, and the drag and lift effect of the jet on the suction surface of blunt tail flange is obvious, especially at 15 擄angle of attack. The lift coefficient is increased by about 40 and the drag coefficient is reduced by about 25. When the velocity of dimensional-jet and the frequency of dimensional-jet are both 1:00, the effect of jet on airfoil lift and drag reduction is the best.
【作者單位】： 北京理工大學(xué)機械與車輛學(xué)院;
【基金】：高等學(xué)校博士點專項科研基金資助項目(20111101130002)
【分類號】：O358
【正文快照】： 0前言 合成射流,也即零質(zhì)量射流,是一種全新的、 具有廣泛應(yīng)用前景的流動控制技術(shù)。與傳統(tǒng)的流動控制手段相比,這種射流裝置無機械移動部件、無需氣源管道、結(jié)構(gòu)緊湊,以及具有響應(yīng)快、頻帶寬等優(yōu)點,可用于分離控制、增強混合、提高微型飛機的操縱力以及實現(xiàn)推力矢量控制等。，

本文編號：1476081