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Register a new userStudying the effect of the opening discharge diameter in cylindrical silo on the flow pattern and wall pressure
دراسة تأثير قطر فتحة التفريغ في الصوامع الدائرية على شكل الجريان و على الضغط الناجم على جدران الصومعة
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Damascus University ورقة بحثية
Publication date
2012
fields
Structural Engineering
and research's language is
العربية
Authors
هالة حمادة( باحث )
Created by
Shamra Editor
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تُعرض في هذا البحث الدراسة التجريبية عن تأثير أبعاد فتحة التفريغ في شكل جريان المواد الحبيبية داخل الصومعة، و كذلك في الضغط الأفقي الناتج على جدار هذه الصومعة، إِذ أجرِيت التجارب على صومعة اسطوانية معدنية ذات قاعدة أفقية، و استعملت الذرة العلفية بوصفها مادةً حبيبية، و روقب الجريان بأخذ منصف من البلكس غلاس يمر من مركز الصومعة و يقسمها إلى نصفين، في حين أن الضغط قيس لصومعة كاملة و على عدة نقاط على كامل ارتفاع الصومعة، و قد أظهرت القياسات أن الضغط الأفقي المطبق على جدار الصومعة لا يتأثر تأثراً كبيراً نتيجة تغيير أبعاد فتحة التفريغ.
This paper presents an experimental investigation of the flow pattern and wall pressure due to the change of the opening discharge diameter in cylindrical silos. The experiments were performed on a metal silo prototype using corn as a granular material. The silo prototype used in the study was built of a metallic cylinder, which can be opened longitudinally allowing the observation of the flow pattern through a plexi-glass wall, and the wall pressure distribution was measured using a special granular pressure transducer. The present study revealed unexpected results to what might be expected through current theoretical knowledge.
References used
DIN 1055, " Design Loads for buildings/ Loads in silo bins" German standards ( DIN Normen ), 2000, 6pp
Istvan, Oldal, Dr. Bela, M.Csizmadia," Determination of velocity distribution at silo outlet", international multidisciplinary conference, Baia Mare, Romania, May 17-18, 2007
J. Hartl, J. Y. Ooi, J. M. Rotter, M. Wojcik, S. Ding, G. G. Enstad, " The influuence of a cone – in – cone insert on flow pattern and wall pressure in a full scale silo". Chemical engineering research and design, 36 (2008), 370-378
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The aim of this paper is to present a recent experimental investigation of the wall pressure distribution observed during the emptying of a modeling silo, with and without, inserts, for three different
heights hi of the insert base above the hopper
outlet. The experiments were carried out with corn, at the concrete lab. in faculty of civil engineering in Damascus university in Syria. The results show that the upper-cone with downer-cone trunk insert had a strong influence on the pressures in the silo.
The aim of this paper is to present a recent experimental investigation of the wall pressure distribution observed during the emptying of a modeling silo, with and without inserts for four different heights hi of the insert base above the hopper outl
et. The experiments were carried out with corn, at the concrete lab. in faculty of civil engineering in Damascus university in Syria. The results show that the upper-cone with downer- truncated cone insert had a strong influence on the pressures in the silo.
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as
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