無(wú)軸涵道旋翼氣動(dòng)特性數(shù)值研究(英文)
發(fā)布時(shí)間:2024-01-30 20:02
無(wú)軸涵道旋翼(Shaftless ducted rotor,SDR)是一種采用涵道-旋翼-電機(jī)一體化設(shè)計(jì)的新型涵道旋翼系統(tǒng),其與傳統(tǒng)涵道旋翼(Ducted rotor,DR)氣動(dòng)特性有較大差異。基于非結(jié)構(gòu)網(wǎng)格的滑移網(wǎng)格技術(shù),首先分析了SDR與DR氣動(dòng)特性差異,然后分別考察了槳盤高度、槳葉片數(shù)、涵道擴(kuò)散角、中心孔徑及涵道唇口半徑5個(gè)關(guān)鍵參數(shù)對(duì)SDR氣動(dòng)特性的影響。研究發(fā)現(xiàn):相同尺寸SDR比DR在懸停狀態(tài)能夠產(chǎn)生更大的總拉力,但其涵道拉力占比減小。前飛狀態(tài)下SDR涵道后方產(chǎn)生較大的低速區(qū),前行槳葉上方渦環(huán)有向內(nèi)擴(kuò)散趨勢(shì)。槳盤高度對(duì)SDR與DR的影響機(jī)理相似。增加槳葉片數(shù)能夠有效提高SDR的總拉力值,也能提高涵道拉力占比。增大涵道擴(kuò)散角將導(dǎo)致SDR旋翼拉力系數(shù)下降。減小中心孔徑能提高總拉力,但各部分拉力系數(shù)在下降。適當(dāng)增加涵道唇口半徑能夠提高總拉力大小,超過(guò)一定值后總拉力開(kāi)始下降。
【文章頁(yè)數(shù)】:12 頁(yè)
【文章目錄】:
0 Introduction
1 Structural Composition of SDR
2 Numerical Computation Method
2.1 Governing equation
2.2 Model and mesh generation
3 Verification of Calculation Method
4 Results and Analysis
4.1 Differences in aerodynamic characteristics between SDR and DR
4.2 Influence of rotor disk height
4.3 Influence of number of blades
4.4 Influence of spread angle of ducted
4.5 Influence of the central hole radius
4.6 Influence of ducted lip radius
5 Conclusions
本文編號(hào):3890314
【文章頁(yè)數(shù)】:12 頁(yè)
【文章目錄】:
0 Introduction
1 Structural Composition of SDR
2 Numerical Computation Method
2.1 Governing equation
2.2 Model and mesh generation
3 Verification of Calculation Method
4 Results and Analysis
4.1 Differences in aerodynamic characteristics between SDR and DR
4.2 Influence of rotor disk height
4.3 Influence of number of blades
4.4 Influence of spread angle of ducted
4.5 Influence of the central hole radius
4.6 Influence of ducted lip radius
5 Conclusions
本文編號(hào):3890314
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