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Product Code:SAE AIR1168/11
Title:Spacecraft Boost and Entry Heat Transfer
Issuing Committee:Ac-9 Aircraft Environmental Systems Committee
Scope:The prediction of vehicle temperatures during ascent through the earth驴s atmosphere requires an accurate knowledge of the aerodynamic heating rates occurring at the vehicle surface. Flight parameters required in heating calculations include the local airstream velocity, pressure, and temperature at the boundary layer edge for the vehicle location in question. In addition, thermodynamic and transport air properties are required at these conditions.Both laminar and turbulent boundary layers occur during the boost trajectory. Experience has shown that laminar and turbulent heating are of equivalent importance. Laminar heating predominates in importance in the stagnation areas, but the large afterbody surfaces are most strongly affected by turbulent heating. Once the local flow conditions and corresponding air properties have been obtained, the convective heating rate may be calculated for a particular wall temperature. This assumes that the boundary layer flow regime (that is, turbulent, laminar, or transitory) has also been established, so that a heating theory corresponding to the particular flow conditions may be selected.This section presents theoretical methods for computing boost vehicle surface aerodynamic heating rates. First, procedures are given for computing the local flow distributions around the vehicle. Second, methods are given for computing the convective heating rates, using the flow parameters found previously.【英文标准名称】:Thermalperformanceofwindows,doorsandshutters-Calculationofthermaltransmittance-General
【原文标准名称】:门窗和百叶窗的热性能.热传递系数的计算.通用
【标准号】:BSENISO10077-1-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-11-30
【实施或试行日期】:2006-11-30
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑物;计算方法;建筑;定义;家用设施;门;空间围栏;端接;试验(质量保证);门窗玻璃;热力工程;热流;热损耗;热传输;数学计算;遮板;简化;天窗;结构热工性能;隔热;材料热性质;热防护;热阻;热传输系数;热传递;窗
【英文主题词】:Buildings;Calculatingmethods;Construction;Definitions;Domesticfacilities;Doors;Enclosureofspace;Endings;Examination(qualityassurance);Glazing;Heatengineering;Heatflow;Heatloss;Heattransfer;Mathematicalcalculations;Methodsofcalculation;Shutters(buildings);Simplifications;Skylight;Thermalbehaviourofstructures;Thermalinsulation;Thermalpropertiesofmaterials;Thermalprotection;Thermalresistance;Thermaltransmissioncoefficient;Thermaltransmittance;Windows
【摘要】:ISO10077-1:2006specifiesmethodsforthecalculationofthethermaltransmittanceofwindowsandpedestriandoorsconsistingofglazedand/ororopaquepanelsfittedinaframe,withandwithoutshutters.ISO10077-1:2006allowsforthefollowing:differenttypesofglazing(glassorplastic;singleormultipleglazing;withorwithoutlowemissivitycoatings,andwithspacesfilledwithairorothergases);opaquepanelswithinthewindowordoor;varioustypesofframes(wood,plastic,metallicwithandwithoutthermalbarrier,metallicwithpinpointmetallicconnectionsoranycombinationofmaterials);whereappropriate,theadditionalthermalresistanceintroducedbydifferenttypesofclosedshutter,dependingontheirairpermeability.ThethermaltransmittanceofroofwindowsandotherprojectingwindowscanbecalculatedusingISO10077-1:2006,providedthatthethermaltransmittanceoftheirframesectionsisdeterminedbymeasurementorbynumericalcalculation.Defaultvaluesforglazing,framesandshuttersaregiveninISO10077-1:2006.Thermalbridgeeffectsattherebateorjointbetweenthewindowordoorframeandtherestofthebuildingenvelopeareexcludedfromthecalculation.Thecalculationalsodoesnotincludeeffectsofsolarradiation,heattransfercausedbyairleakage,calculationofcondensation,ventilationofairspacesindoubleandcoupledwindowsandsurroundingpartsofanorielwindow.ISO10077-1:2006doesnotapplytocurtainwallsandotherstructuralglazingandindustrial,commercialandgaragedoors.
【中国标准分类号】:Q70
【国际标准分类号】:91_060_50;91_120_10
【页数】:46P.;A4
【正文语种】:英语