本文選題：旋翼　切入點：槳尖渦　出處：《南京航空航天大學(xué)學(xué)報》2016年02期 　論文類型：期刊論文

【摘要】：開槽槳尖是減弱旋翼槳尖渦強度的一種被動流動控制手段。旋翼槳尖渦由于渦量高度集中在一個很小的區(qū)域范圍內(nèi),數(shù)值計算容易受到網(wǎng)格分布和數(shù)值耗散的影響,導(dǎo)致渦量耗散過快,不利于對旋翼尾跡渦開展研究。針對這一問題,文中采用重疊網(wǎng)格局部加密和湍流模型旋轉(zhuǎn)修正等方法,獲得了懸停旋翼的高分辨率槳尖渦流場。采用該方法,對比研究了Caradonna-Tung旋翼基本外形和開槽槳尖外形在懸停狀態(tài)下的空間旋渦流場,從渦量分布、旋渦特征速度等方面研究了開槽槳尖控制槳尖渦強度的流動機理,比較了4種不同開槽方式對控制效果的影響,以及對旋翼懸停性能的影響。結(jié)果表明,開槽槳尖能夠有效減弱槳尖渦的強度,但同時會對旋翼拉力和扭矩產(chǎn)生一定的負面影響。
[Abstract]:The slotted propeller tip is a passive flow control method to reduce the vortex intensity of rotor tip. The tip vortex of rotor rotor is easily affected by the grid distribution and numerical dissipation because the vortex height is concentrated in a very small region. The vorticity dissipation is too fast, which is not conducive to the study of rotor wake vortices. In order to solve this problem, some methods such as overlapping mesh local encryption and turbulence model rotation correction are used in this paper. The swirl field of high resolution propeller tip of hovering rotor is obtained. By using this method, the spatial vortex flow field of Caradonna-Tung rotor is compared with that of slotted rotor tip in hovering state. The flow mechanism of slotted propeller tip controlling tip vortex strength is studied in terms of vortex characteristic velocity. The effects of four different grooving modes on the control effect and the hovering performance of rotor are compared. The slotted tip can effectively reduce the strength of the tip vortex, but it will have some negative effects on the rotor tension and torque at the same time.
【作者單位】： 中國空氣動力研究與發(fā)展中心計算空氣動力研究所;
【基金】：國家自然科學(xué)基金(11572341)資助項目
【分類號】：V211

【相似文獻】

相關(guān)期刊論文 前10條

1 宋亞平;淺談旋翼的防腐維護[J];航空維修與工程;2004年04期

2 _5^懔，

本文編號：1620867