本文選題：蛇形進氣道 + 歐拉/歐拉法�。� 參考：《推進技術(shù)》2016年12期

【摘要】：為了了解亞聲速蛇形進氣道影響下航空發(fā)動機進口段迎風表面處的水滴撞擊特性,采用歐拉/歐拉法對蛇形進氣道和發(fā)動機進口段在來流馬赫數(shù)為0.3及環(huán)境溫度為266.5K的大氣結(jié)冰條件下進行了空氣/過冷水滴兩相流場的計算,再由已獲得的水滴流場進行支板表面水撞擊特性的計算。整流罩表面水滴的撞擊計算時采用插值的方法將原兩相流場的計算結(jié)果插值到新生成的整流罩的近壁網(wǎng)格處,之后采用新生成的整流罩面網(wǎng)格進行水撞擊特性的計算。通過計算獲得了發(fā)動機進口結(jié)冰參數(shù)、支板以及整流罩表面水收集系數(shù)的分布。計算結(jié)果表明整流罩和支板表面水滴撞擊的主要區(qū)域與進氣道的彎曲方向有關(guān)且位于其下表面一側(cè),最大水收集系數(shù)達到0.98。與之相對比的整流罩和支板其他區(qū)域的水收集系數(shù)則顯得非常微小,在數(shù)值上約等于0。此外,對于與進氣道對稱面平行的豎直支板,其與機匣相交的區(qū)域存在水收集系數(shù)為0遮蔽區(qū)。
[Abstract]:In order to understand the impact characteristics of water droplets on the upwind surface of the inlet section of an aeroengine under the influence of a subsonic snake inlet, Euler / Euler method was used to calculate the two-phase air / subcooled water droplet flow field in the snake-shaped inlet and the inlet section of the engine under the condition of ambient temperature 266.5K and Mach number 0.3. Then the water impact characteristics on the surface of the supporting plate are calculated from the obtained water droplet flow field. In the calculation of the impact of water droplets on the fairing surface, the results of the original two-phase flow field are interpolated to the near wall grid of the newly generated fairing, and the water impact characteristics are calculated by the newly generated rectifier overlay mesh. The distribution of the inlet ice parameters, the water collection coefficient on the surface of the supporting plate and the fairing is obtained by calculation. The results show that the main area of water droplet impact on the fairing and branch plates is related to the bending direction of the inlet and is located on the lower side of the inlet. The maximum water collection coefficient is 0.98. In contrast, the water collection coefficient of the fairing and other areas of the supporting plate is very small, with a numerical value of about 0. 5%. In addition, for the vertical branch plate parallel to the symmetrical plane of the inlet, there exists a water collection coefficient of 0 shelter in the region intersecting with the casing.
【作者單位】： 南京航空航天大學能源與動力學院;
【分類號】：V231

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本文編號：2086418