Finite Element Analysis of the Effect of Internal Pressure on Orifice Flowmeter
Lianghuai Tong,
Sulu Zheng,
Xiuqin Chen,
Jian Fan,
Shuyuan Wang,
Jinfu Li
Issue:
Volume 4, Issue 4, July 2019
Pages:
52-63
Received:
20 September 2019
Accepted:
7 October 2019
Published:
20 October 2019
Abstract: The flow rate in a closed pipe is a dynamic value, the instrument for measuring the flow rate is called a flowmeter. Typical flowmeters are: differential pressure flowmeter, electromagnetic flowmeter, coriolis mass flowmeter, vortex flowmeter, ultrasonic flowmeter, etc. Among them, differential pressure flowmeter, represented by orifice flowmeter, is the mainstream flowmeter applied at home and abroad. Orifice flowmeter has the advantages of simple structure, low cost and stable performance, it is widely used in chemical industry, electric power, heating, water supply and other fields, and can be used to measure the flow of different media. When the fluid filled with pipeline flows through the orifice plate, it will produce local contraction, concentration of flow beam, increase of flow velocity, and decrease of static pressure, so there will be a static pressure difference before and after the orifice plate. The orifice flowmeter is equipped with an orifice plate on the pipeline, and the orifice plate is connected with pressure measuring tubes on both sides, and they are respectively connected with a U-type pressure differential meter. Orifice flowmeter uses the throttling effect of fluid through the sharp hole to increase the flow velocity and decrease the pressure, resulting in the pressure difference between front and back orifice plates, as the basis of measurement. In this paper, to study the influence of different pressure loads on the accuracy of the orifice flowmeter, the mathematical model is established by simulation software, and the different pressure loads of the orifice flowmeter are analyzed under the temperature load of 20°C. The results show that the location of the orifice flowmeter under the maximum stress, maximum displacement and maximum strain under the pressure load of 0.1 MPa is different from that under the pressure load of 50 MPa and 100 MPa. When the pressure loads are respectively 0.1 MPa, 50 MPa, and 100 MPa, the location of maximum stress and displacement of the orifice flowmeter are the same.
Abstract: The flow rate in a closed pipe is a dynamic value, the instrument for measuring the flow rate is called a flowmeter. Typical flowmeters are: differential pressure flowmeter, electromagnetic flowmeter, coriolis mass flowmeter, vortex flowmeter, ultrasonic flowmeter, etc. Among them, differential pressure flowmeter, represented by orifice flowmeter, ...
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Preparation and Characterization of Acacia Catechu Film: Effect of Monomer (HEMA) and UV Radiation
Md. Iftakharul Alam,
Md. Sahadat Hossain,
Ruhul A. Khan,
A. M. Sarwaruddin Chowdhury
Issue:
Volume 4, Issue 4, July 2019
Pages:
64-68
Received:
20 September 2019
Accepted:
10 October 2019
Published:
26 October 2019
Abstract: Nature is the prime source of everythings. So, in this research we selected the plant source for the extraction of resin from acacia catechu. Raw acacia catechu was collected from the plant for the extraction of resin and preparation of film. A mixture of 60% ethanol and 40% benzene was used as solvent for the extraction of resin. After extraction, polymeric films were prepared by casting the extracted solution maintaining the thickness 1 to 3 mm. Now-a-days monomers are widely used for the improvement of properties. In this case monomer (HEMA) was used to improve the mechanical properties of prepared film. Different percentages (10, 12.5 and 15%) of monomer were used with the catechu but 12.5% showed better results than the others two. Different types of high energy radiation (gamma radiation, UV-radiation, etc.) are also widely used for the improvement of different types of properties. With the HEMA grafted catechu film different pass (15, 20 and 25) of UV radiation was applied. The highest result was obtained for the 20 UV radiation pass and the monomer concentration was 12.5% which was taken as optimum. At the optimum condition the highest TS and TM values were 4.5 MPa, and 72MPa respectively as well as the lowest elongation at break was 1.44%.
Abstract: Nature is the prime source of everythings. So, in this research we selected the plant source for the extraction of resin from acacia catechu. Raw acacia catechu was collected from the plant for the extraction of resin and preparation of film. A mixture of 60% ethanol and 40% benzene was used as solvent for the extraction of resin. After extraction,...
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