新技术新工艺
新技術新工藝
신기술신공예
NEW TECHNOLOGY & NEW PROCESS
2014年
5期
62-64,65
,共4页
非光滑表面%减阻%旋成体%叶序排布%凹坑尺寸
非光滑錶麵%減阻%鏇成體%葉序排佈%凹坑呎吋
비광활표면%감조%선성체%협서배포%요갱척촌
non-smooth surface%drag reduction%revolution body%phyllotactic pattern%dimple Size
为了降低旋成体在空气运动中的飞行阻力,将生物学的叶序排布理论应用于旋成体的非光滑表面排布设计中,并且应用计算机仿真技术,研究了非光滑表面的凹坑尺寸对减阻的影响。在仿真过程中,分别分析了旋成体表面的凹坑深度和凹坑直径对减阻效果的影响,并阐述了叶序排布凹坑能够减阻的机理。计算机仿真结果表明,适当地选择非光滑表面的凹坑尺寸能够改变凹坑的减阻效果。在本文的试验研究条件下,最大总减阻率达到了1.51%。
為瞭降低鏇成體在空氣運動中的飛行阻力,將生物學的葉序排佈理論應用于鏇成體的非光滑錶麵排佈設計中,併且應用計算機倣真技術,研究瞭非光滑錶麵的凹坑呎吋對減阻的影響。在倣真過程中,分彆分析瞭鏇成體錶麵的凹坑深度和凹坑直徑對減阻效果的影響,併闡述瞭葉序排佈凹坑能夠減阻的機理。計算機倣真結果錶明,適噹地選擇非光滑錶麵的凹坑呎吋能夠改變凹坑的減阻效果。在本文的試驗研究條件下,最大總減阻率達到瞭1.51%。
위료강저선성체재공기운동중적비행조력,장생물학적협서배포이론응용우선성체적비광활표면배포설계중,병차응용계산궤방진기술,연구료비광활표면적요갱척촌대감조적영향。재방진과정중,분별분석료선성체표면적요갱심도화요갱직경대감조효과적영향,병천술료협서배포요갱능구감조적궤리。계산궤방진결과표명,괄당지선택비광활표면적요갱척촌능구개변요갱적감조효과。재본문적시험연구조건하,최대총감조솔체도료1.51%。
In order to reduce the flying force of revolution body flying in air,the non-smooth surface of revolution body was designed based on phyllotaxis theory.With the help of computer simulation,the effects of the dimples size of non-smooth surface with phyllotactic pattern on drag reduction were calculated,the effects of diameter and depth of the dimples on the revolution body were analyzed during the simulation,the mechanism of phyllotactic pattern dimples dragging reduc-tion was elaborated.The simulation results showed that the maximum rate of drag reduction can achieve 1 .5 1% when the size of dimples was chosen appropriately.