توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Predicting Functional Failure Pressures in Filament Wound GRP Mortar Pipes
نویسنده(ها): ، ،
اطلاعات انتشار: کنفرانس دو سالانه بین المللی مکانیک جامدات تجربی، سال
تعداد صفحات: ۶
Thanks to light weight, high corrosion resistance, non–toxicity, low internal friction, longer services life and low thermal and electrical conductivity, Glass fiber Reinforced Polyester (GRP) pipes are utilized in a wide range of applications such as water supply, waste water transmission, drainage, irrigation network and power plants.GRP pipe producers most often have to design thicker walls in pipe constructions to increase the stiffness of the pipe against external transverse loading especially for buried pipe applications. A simple and cost–effective way for increasing the wall thickness is to use impregnated filler layer between FRPs plies instead of improving thickness solely by FRP layers.The aim of this paper is to investigate damage mechanism of GRP pipes having a sand core layer subjected to internal pressure. In this regard, a parametric progressive damage modeling is developed in ANSYS commercial. The influence of core thickness on first–ply pressure and functional failure pressure (at which weepage occurs) is then studied. To validate developed modeling, the results obtained from theoretical modeling are compared with experimental results from hydrostatic tests and a good agreement is observed.<\div>

۲A review study on modified twisted tape inserts on tubular heat exchangers
نویسنده(ها): ،
اطلاعات انتشار: ششمین کنفرانس مبدلهای گرمایی، سال
تعداد صفحات: ۱۷
Enhancing heat transfer mechanisms are used in many industrial applications like heat exchanger, air conditioning, chemical reactors and refrigeration systems. Therefore several techniques have been promoted to enhance heat transfer rate and to decrease the size and cost of equipments especially the heat exchangers. In this present study, attempts were made to review experimental and numerical researches done in recent years to investigate the heat transfer characteristics of a heat exchanger. For the purpose of heat transfer enhancement, the configuration of heat exchangers was improved through the installation of different devices for example twisted tape inserts. The results of heat transfer show that the shell – side and tube – side heat transfer coefficient of the heat exchanger increased. But at any time the use of twisted tape inserts can be caused decisive effect on pressure drop and pumping power consumption can be increased. So that any augmentation used into the heat exchanger should be optimized among the benefits of heat transfer and the higher pumping cost rate<\div>
نمایش نتایج ۱ تا ۲ از میان ۲ نتیجه