Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userStudying the effect of insert position on wall pressure for steel barrel silo
دراسة تأثير توضع عنصر مدخل ضمن صومعة معدنية اسطوانية في توزع الضغط الناجم على جدارها
1193
0 17
0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
البحث المتناول هو بحث تجريبي في الصوامع المعدنية الاسطوانية لدراسة تأثير توضع عنصر مدخل مقترح ضمن الصومعة في الضغط الناجم على جدارها، إِذ استعمل نموذج صومعة معدنية و نموذج عنصر مدخل بشكل مخروط علوي و جذع مخروط معكوس و استعملت الذرة العلفية في إجراء التجارب، و اختيرت عدة مستويات لقياس الضغط الناجم عن الجريان على جدار الصومعة و حلَِّلت النتائج و نُوقشت للوصول إلى علاقة رياضية لإيجاد الضغط الناتج عن التفريغ بوجود عنصر مدخل. أجريت التجارب في مخبر البيتون و مواد البناء في كلية الهندسة المدنية بجامعة دمشق. و بينت النتائج أن توضع العنصر المدخل ضمن القمع و أقرب ما يمكن إلى منطقة الانتقال من جسم الصومعة إلى القمع يسبب زيادة طفيفة في الضغط الناتج على جدار الصومعة، و هذا ما يبرر استعمال العنصر المدخل ضمن الصومعة لأنَّه يساعد على تسهيل جريان المادة المخزنة دون حدوث زيادة كبيرة في الضغط الديناميكي الناتج على الجدار.
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.
References used
Rotter j.m (2001), " Guide For The Economic Design Of Circular Metal Silos“, Spon Press, London
Jintao Wu, Jiang Binbo, Jizhong Chen, Yongrong Yang (2008)." Multi-scale study of particle flow in silos“, Journal of advanced Powder Technology 20 (2009) pp.62-73
Carson J.W, Troxel T.J & Bengston K.E (2008). “ Scaling up solids handling processes and equipment: limits of theory and scale modeling”, in: Chen J.F, Ooi J.Y & Teng J.G, editors. "Structures and Granular Solids”, Taylor & Francis Group, London, UK
rate research
Read More
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 mater
ial. 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.
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.
Analysis study was done to explain the effect of the
longitudinal section on the values of pressure of the water
hammer resulting from the trip of pumps, which results a low
pressure wave often lead to get cavitation, has been shown from
the anal
ytical study of several profiles and compare the results,
that the shape of the profile and the level of the pressure line
after the stopping of pumps determines the type of cavitation
formed , the region in which it occurs and the pressure values
resulting from it, when the profile doesn’t contain bends or the
bends are below the level of line pressure a distributed
cavitation is occurred, In the case of the presence of high points
, the effect of the bend is linked to several factors:
1 - the greater the height of the bend above line pressure increases the possibility for column separation and increases the pressure
forces.
2 –the pressure forces increase whenever the bend closer to the pumps.
This research discusses the exponential function of the explosion load and the pressure decay factor in this function (a). After that, four functions with four different values of the pressure decay factor are studied, and that is for the un-damped S
DOF system, where the equation of motion is formed and solved. Then, using MATLAB software for every function, the relationship between (Yst/Y(t)) and t/T is plotted, and that enables plotting the response spectrum for each one. Moreover, a comparison between the spectra of the last three functions with the first one that describes the triangular explosion load is drawn. This research has concluded that for a certain range of (a), it is possible, and with acceptable approximation, to use the spectra of triangular load, but beyond that it is better to use the spectra of exponential load.
Corrosion is the most important problem in the process of oil production, Its results are: sudden fracture, high economic cost and great loss in oil equipment. Appropriate solutions have been suggested to extend the life of facilities, and to avoid c
orrosion phenomenon which may get the facility out of service, But, finding the main
reasons causing this phenomenon, and studying the factors that contribute to increase or reduce the spread of corrosion requires more urgent attention.
In this paper, the data of the pressure has been analyzed in three crude oil pipelines and focus was on the values during the days where changes were irregular. In the same period, the study of internal corrosion rate was being done, using weight loss method. It has been noticed that when the value of pressure is greater than 2 Mpa, the
internal corrosion rate will be above the maximum. allowable limit which is 4 mil per year (MPY), while the internal corrosion rate will be within the acceptable range when the pressure is not greater than 1 Mpa.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
