亚跨超声速返回舱动稳定特性

《亚跨超声速返回舱动稳定特性》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、第35卷第2期航天返回与遥感2014年4月SPACECRAFTRECOVERY&REMOTESENSING31亚跨超声速返回舱动稳定特性宋玉辉陈农秦永明（中国航天空气动力技术研究院，北京100074）摘要在“阿波罗”、“联盟号”和“海盗号”等返回舱与行星探测器研发阶段，动稳定特性严重影响着降落伞系统与控制系统的设计。文章采用风洞自由振动试验方法，研究有/无前端框两种返回舱外形的动稳定特性。试验结果表明：两种返回舱外形动稳定导数的量级在全马赫数范围内都很小，在亚、跨声速，甚至超声速范围均出现动不稳定现象。该现象与返回舱分离区

2、绕流特性密切相关。返回舱的动稳定导数随攻角的起伏变化很大，具有很强的非线性特征。在亚声速和跨声速范围，返回舱的动稳定性呈现明显的极限环振动特性。有/无前端框模型的试验结果对比表明：有前端框模型和无前端框模型动稳定性规律比较接近，但是由于前端框表面绕流影响，无前端框模型的稳定性比有前端框模型要稍差一些。关键词返回舱动稳定特性亚跨超声速风洞试验航天器中图分类号:V211.74文献标志码:A文章编号:1009-8518(2014)02-0031-08DOI:10.3969/j.issn.1009-8518.2014.02.005

3、Sub-,Trans-andSuper-sonicDynamicStabilityCharacteristicsforReentryCapsuleSONGYuhuiCHENNongQINYongming（ChinaAcademyofAerospaceAerodynamics,Beijing100074,China）AbstractInthedevelopmentphaseofreentrycapsulesandplanetaryentryprobes,likeApollo,SoyuzandViking,thedynamic

4、stabilitycharacteristicshastobeinvestigated,asithasstronginfluenceonthedesignofdescentsubsystem(parachute),andpossiblythereactioncontrolsystem(RCS).Wind-tunneltestinvestigationshavebeenmadetodeterminethedynamicstabilitycharacteristicsoftworeentrycapsuleconfigurati

5、onsbyusingafree-oscillationtechnique,i.e.,acapsuletypewhichhasabluntedforebodyfollowedbyaconicalboattailwith/withoutcylindricalbase.TestresultsindicatethatthedynamicstabilityderivativesofthetworeentrycapsuleconfigurationsaresmallatalltheMachnumbers,whilethedynamic

6、unstabilityinpitchdirectioninsub-,trans-andevensupersonicMachnumberrange.Thisbehaviorseemstobecloselyrelatedtocircumferentialflowatseparationzone.ThedynamicstabilitydevivativesofthetwocapsulesdisplaylargechangeswithangleofattackandMachnumber,presentingstrongnon-li

7、nearcharacteristics,whichturnedoutlimitedcyclemotion.Resultsoftheconfigurationwith/withoutcylindricalbasetestsindicatedthatthedynamicstabilitycharacteristictrendsofthetwotypecapsuleconfigurationsaresimilar,butthedynamicstabilityoftheconfigurationwithcylindricalbas

8、eresultsalittlebetterduetoflowreattachmenteffectsoccurringonthecylindersurfaceofthecapsules.Keywordsreentrycapsule；dynamicstabilitycharacteristics；sub-,