پديد آورنده :
درويش زاده، مهدي
عنوان :
شبيه سازي انتقال حرارت گذرا در ساختارهاي اليافي بي بافت
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده نساجي
صفحه شمار :
هشت،75ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمد شيخ زاده، داريوش سمناني
استاد مشاور :
ابراهيم شيراني
تاريخ نمايه سازي :
23/2/92
استاد ممتحن :
محمد ذره بيني، محمد اماني تهران، محمدرضا سليم پور
كد ايرانداك :
ID505 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
86 Transient Heat Transfer Simulation in Nonwoven Fibrous Structures Mehdi Darvishzadeh E mail mdarvish@tx iut ac ir Date of Submission January 2 2013 Department of Textile Engineering Isfahan University of Technology Isfahan Iran 84156 83111 Supervisor Mohammad Sheikhzadeh m sh110@cc iut ac ir Supervisor Dariush Semnani d semnani@cc iut ac ir Advisor Ebrahim Shirani Department Graduate Program Coordinator sedigheh Borhani Abstract Synthetic nonwoven fibrous layers are widely used in insulation industries such as residential buildings and piping insulation An accurate estimation of thermal diffusivity of bulk complex fibrous material has not been available in transient conditions by commonly used methods In this research attempts was made to estimate transient heat transfer rate of synthetic nonwoven barriers by partial differential equation PDE in numerical aspect An intelligent modeling method based on training of a propagation neural network was applied to estimate thermal diffusivity in transient conditions Nonwoven samples of PAN PET PA 66 and PP were prepared in different weights and thicknesses Temperatures of inner and outer sides of layers were measured in a purpose designed apparatus with precision thermometers The intelligent model is validated by experimental data with a very good accuracy The thermal diffusivity results demonstrated that the PA 66 layers have high insulating resistance with slow heat flow because of their low thermal diffusivities Also the thick layers have less insulating ability in which porous layers with more air permeability insulated heat well The main mechanism of heat transfer in low temperatures is thermal conduction where thick layers with low porosity have more interaction and more conduction between fibers Keywords Synthetic Nonwoven Transient Heat Transfer Thermal Insulation Intelligent Modeling
استاد راهنما :
محمد شيخ زاده، داريوش سمناني
استاد مشاور :
ابراهيم شيراني
