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Results analyze insulation coefficient versus Reynolds number and average Nusselt number versus fabric porosity.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/heat-transfer-from-the-fabric-layers-covered-on-a-circular-cylinder/324356/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/heat-transfer-from-the-fabric-layers-covered-on-a-circular-cylinder/324356.png","ImageObject",300,407,{"name":42,"@type":43},"Genevieve","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-04","2026-09-21",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",13,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What was the main research focus?","Question",{"text":63,"@type":64},"The study focused on experimentally determining heat transfer from fabric layers covering a circular cylinder to surrounding ambient air.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"Which fabric materials were selected for the experiments?",{"text":68,"@type":64},"Cotton sheeting; acrylic, worsted, and woolen plain knitted fabrics; polyester-rayon twill; quilting; and some composite combinations of these fabrics were used.",{"name":70,"@type":61,"acceptedAnswer":71},"How were heat transfer performance and insulation effects evaluated?",{"text":72,"@type":64},"The cylinder surface temperature was held constant, and the work evaluated relationships such as insulation coefficient versus Reynolds number and average Nusselt number versus fabric porosity for different fabrics and flow conditions.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},324356,1790464773,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,111,115,120,123,127],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},6,"Technology",50,"technology",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":108,"show_sort_weight":109,"slug":110},7,"Healthcare",40,"healthcare",{"id":112,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":113,"slug":114},8,30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":25,"category_name":129,"show_sort_weight":97,"slug":130},19,"General","general",{"code":4,"msg":82,"data":132},{"doc_id":79,"user_id":133,"nickname":42,"user_avatar":134,"doc_module":4,"category_id":112,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":113,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":144,"read_time":145,"preview_page_count":4},1374391974585,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Lee,T.S.,and J.K.LeeHeat transfer from the fabric layers cov-ered on a circular cylinder.13 p.Seoul Natl.Univ.Eng.Rpt.16,1:27-31(1984).Filed:  TRANSLATION NO.4438T十KYPTD7  \nBeoul Natl.Univ.Engg.Rpt.  \n16,no.1:27-31(1984)  \nT R A N S L A T I O N  \nHeat Transfer from the Fabric Layers Covered on a Circular Cylinder  \nTaik Sik Lee and Jae Kon Lee(Dept.of Mechanical Eng.)(Dept.of Textile Eng.)  \nAbstract  \nHeat transfer from the fabric layers covered on a circular cylinder to the ambient air was studiedexperimentally.Fabric layers were cotton sheeting,acrylic plain knitted fabric,worsted plain knittedfabric,woolen plain knitted fabric,polyester-rayon twill,quilting and some composite layers ofthese fabrics.The surface temperature of a cylinder was maintained constant by using the constanttemperature control circuit and the experiment was performed in the range of air temperature 10~20℃ and air velocity of 0～12m/s.Insulation effect was showed by the relation between the insu-lation coefcient and Reynolds number for each selected fabric layers and also showed the relationbetween the average Nusselt number and porosity of fabrics for each Reynolds number.  \nPAGE 2  \n# 1.   INTRODUCTION\n\nIn considering the comfort of human body with respect toclothing,one has to take into account such factors asinternal body heat generation per unit surface area,heatinsulation value of the clothing,air temperature,  \naverage radiant temperature,water vapor pressure of thesurrounding air,relative air velocity,average skintemperature,and body heat loss per unit area due tuevaporation of perspiration,etc.[1]  \nFabric is a thin sheeting material made up of yarn wovenin a specific manner with many openings and crevices,andthus possesses ventilating as well as moisture absorbingproperties.  \nIn this research,we used a circular cylinder in place ofhuman body.The cylinder was covered with iayers offabric,place in perpendicular direction to the flowdirection of the air,and studied the heat transferprocess between the cylinder surface and the surroundingair.  Relationship between air flow rate and heattransfer coefficient,change in insulation coefficientdepending on the flow rate,and change in heat transferdepending on the porosity of the fabric for variousfabrics were obtained.  \nPAGE 3  \nFor the experiments,6 different fabrics and 3 of theircomposites were selected.  They were cotton sheeting,3types of underwear materials(acrylic plain knittedfabric,worsted plain knitted fabric,woolen plain  \nknitted fabric),work clothing material(polyester-rayontwill)and quilting.  \n# 2.   PHYSICAL PROPERTY MEASUREMENT\n\nThe fundamental physical properties of the fabrics suchas thickness,specific weight,porosity and air  \npermeability were determined.The thickness was measuredwith a fabric thickness gauge suitable for KS K0506(method of measuring fabric thickness),specific weightwas measured with the precision of 0.1 mg.,and porositywas measured using actual density[2]of the faabric.Air permeability was determined using an air  \npermeability tester suitable for KS K 0570(method ofdetermining air permeability:Frazier's method).  Thevalues obtained for various fabrics are shown in table 1.  \nTable 1.Properties of Fabrics  \n\n|  | Thickness  \u003Cbr>(mm)   | Specific weight  \u003Cbr>(g/cm)   | Porosity  \u003Cbr>(%)   | Air permeability  \u003Cbr>(cm³/min cm²)   |\n| --- | --- | --- | --- | --- |\n| Cotton sheeting   | 0.4   | 0.46.   | 247.5   | 1021.0   |\n| Acrylic plain knitted fabric   | 1.57   | 0.36   | 281.1   | 2975.0   |\n| Worsted plain knitted fabric   | 1.27   | 0.28   | 371.4   | 8662.0   |\n| Woolen plain knitted fabric   | 1.57   | 0.25   | 323.8   | 17983.0   |\n| Polyester·Rayon plain fabric   | 0.51   | 0.60   | 137.7   | 177.0   |\n| Quilting   | 3.15   | 0.08   | 908.4   | 1072.0   |\n\nPAGE 4  \n# 3.   HEAT TRANSFER THROUGH FABRIC LAYERS\n\nHeat transfer through layers of fabric is complicatedinvolving such steps as the heat conduction of thefiber,heat transfer and convection current of ","cbCaiqC9Y0UH2A4R","https://ap.wps.com/l/cbCaiqC9Y0UH2A4R","pdf",969632,"English","# 1. INTRODUCTION\n# 2. PHYSICAL PROPERTY MEASUREMENT\n# 3. HEAT TRANSFER THROUGH FABRIC LAYERS","[{\"question\":\"What was the main research focus?\",\"answer\":\"The study focused on experimentally determining heat transfer from fabric layers covering a circular cylinder to surrounding ambient air.\"},{\"question\":\"Which fabric materials were selected for the experiments?\",\"answer\":\"Cotton sheeting; acrylic, worsted, and woolen plain knitted fabrics; polyester-rayon twill; quilting; and some composite combinations of these fabrics were used.\"},{\"question\":\"How were heat transfer performance and insulation effects evaluated?\",\"answer\":\"The cylinder surface temperature was held constant, and the work evaluated relationships such as insulation coefficient versus Reynolds number and average Nusselt number versus fabric porosity for different fabrics and flow conditions.\"}]","Heat Transfer from the Fabric Layers Covered on a Circular Cylinder | PDF",1789967712,76]