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ID:40559267
大小:208.00 KB
页数:46页
时间:2019-08-04
《low-and high-speed flight experiments on transition detection》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、low-andhigh-speedflightexperimentsontransitiondetectionThispaperdescribesinflightmeasurementsinlowandhighspeedexperimentstoinvestigatelaminar-turbulenttransitiononairfoils.Thelow-speedexperimentswerecarriedoutusingalaminarwinggloveforasailplane.High–speedexperimentsonanmodifiedA320hybridlaminarfinwe
2、reconductedinclosecollaborationwithAirbus.Differentsurfacesensormeasuringtechniques(piezofoil,surfacehotwires,wallmicrophones)wereusedinthelow-speedexperiments.Thepiezofoiltechniquewasappliedinthehigh-speedin-flightexperimentstoprovetheoperation(手术,行动,活动,操作)robustness(强度(坚固性),thefunctionalcapability
3、,durability,andreliabilityunderatmosphericconditions(大气状态)incruiseflightonmodernairplanes.allmeasuringtechniquesweresuccessfullyimplementedfortheparticulartaskandthelaminar-turbulenttransitionwasdetectedwithahighdegreeofcertainty.investigationsacompletepiezofoilsensorarraywasglueddirectlytothefinwit
4、houtcausinganyinterferencebetweentheboundarylayerflowandthesensorfoil.Thistechniquethereforeofferedthegoodpotentialtodetecttransitionintheboundarylayerunderflightconditionsespeciallyinhigh-speedtests.摘要该报告介绍了如何在高、低速飞行试验条件下,测量翼剖面层流-紊流的转变。低速试验用层流翼套套在一架滑翔机上完成,高速试验(在一架与空客合作的)改装的A320混合层流垂尾上完成。低速试验应用(piez
5、ofoil、表面热导线、墙壁麦克风)三种表面传感器测量技术。采用一种压箔技术验证了现代飞机在高速飞行中的操作强度、机动能力、耐久性和可靠性。该项任务中,成功地采用了全部测量技术,测出的层流-紊流变化高度可靠。Forthehigh-speed高速试验中,将一个完整的压箔传感器阵列直接粘在垂尾上,克服了附面层流和传感器箔之间的任何干涉。这种技术适用于飞行条件特别是高速飞行试验条件下,检测边界层层流的变化。IintroductionTheinvestigationspresentedinthispaperareaimedatfindingthelaminar–turbulenttransitioni
6、ntheboundarylayeronanairfoil,particularlythespatialdevelopmentandgrowthofflowinstabilitiessuchasTollmien-Schlichting(TS)wavesthatleadtotransition1介绍本文调查的目的是为了寻找在翼剖面界面层层流-紊流的转变,主要是研究在空间发展和不稳定流的成长如Tollmien-Schlichting型扰动ItiswellknownthatthegenerationofTSwavesstronglydependsontheenvironmentalflowcondit
7、ions.众所周知,产生一次TS波极其需要依赖环境流量条件。Itisthereforenecessarytoinvestigatethetransitionunderrealflightconditionsaswellasinwind-tunneltests.因此很有必要,探讨实际飞行条件和风洞测试的转换。BasedontheexperiencegainedintheDeutscheForschu
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