Theoretical and Experimental Studies of Hydraulic Characteristics of Discharge Tunnel with Vortex Drop

2010 ◽  
Vol 22 (4) ◽  
pp. 582-589 ◽  
Author(s):  
Hua-yong Chen ◽  
Wei-lin Xu ◽  
Jun Deng ◽  
Zhi-pan Niu ◽  
Shan-jun Liu ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Hydraulic Characteristics ◽  
Discharge Tunnel

Hydraulic characteristics and calculation of the innovative systems of surface runoff disposal

2021 ◽  
pp. 46-51
Author(s):  
Ю.В. Брянская ◽  
А.Э. Тен ◽  
Н.Т. Джумагулова ◽  
Г.Н. Громов
Keyword(s):  
Cross Sections ◽  
Surface Runoff ◽  
Experimental Studies ◽  
Drainage System ◽  
Anthropogenic Pollution ◽  
Hydraulic Characteristics ◽  
Regulatory Requirements ◽  
The Subject ◽  
Intensive Development ◽  
Selection Of

В условиях интенсивного развития новых отечественных и зарубежных технологий, материалов и оборудования, применяемых для защиты окружающей природной среды от загрязнений техногенного происхождения, особую актуальность приобретают разработки новых систем отвода и очистки поверхностных сточных вод. Эти системы позволяют использовать последние достижения отраслевой науки и оптимизировать алгоритм выполнения операций и практических приемов их гидравлического расчета. Примером является инновационная система отвода поверхностных сточных вод АСО Qmax, которая относится к открытой системе каналов (лотков) для сбора и отведения поверхностных сточных вод, формирующихся при выпадении атмосферных осадков. Однако широкому применению данного вида конструкций в России препятствует отсутствие методики их гидравлического расчета, в том числе таблиц для подбора сечений (диаметров) каналов, которая бы удовлетворяла требованиям российской нормативно-методической базы проектирования систем отведения поверхностных сточных вод. В этой связи предметом данной статьи явилась оценка гидравлических характеристик трубопроводов, каналов (лотков) системы водоотвода АСО Qmax. Приведены результаты теоретических и экспериментальных исследований гидравлических характеристик системы АСО Qmaxс учетом адаптации для российских условий и нормативных требований, а также обоснование рекомендуемых параметров для их использования. In the context of the intensive development of new domestic and foreign technologies, materials and equipment used to protect the environment from anthropogenic pollution, the development of advanced systems for surface runoff removal and treatment is of special actuality. These systems provide for using the latest achievements of the sectoral science and optimizing the algorithm for performing operations and practical methods for the hydraulic calculations. An example of the innovative surface runoff disposal system is ASO Qmax, that refers to an open system of channels for the collection and disposal of surface runoff formed during precipitation. However, the widespread use of these facilities in Russia is hampered by the lack of a method for the hydraulic calculations, including tables for the selection of cross-sections (diameters) of channels that meet the requirements of the Russian guidelines and regulations for the design of surface runoff disposal systems. In this regard, the subject of this paper is the estimation of the hydraulic characteristics of pipelines, channels of ASO Qmax drainage system. The results of theoretical and experimental studies of the hydraulic characteristics of ASO Qmax system with account of the adaptation for the Russian conditions and regulatory requirements, as well as the justification of the recommended parameters for their use are presented.

Developing a set of measures to provide maximum hydraulic efficiency of gas gathering pipelines

2020 ◽  
Vol 1 (101) ◽  
pp. 27-41
Author(s):  
V.B. Volovetskyi ◽  
A.V. Uhrynovskyi ◽  
Ya.V. Doroshenko ◽  
O.M. Shchyrba ◽  
Yu.S. Stakhmych
Keyword(s):  
Oil And Gas ◽  
Experimental Studies ◽  
Expansion Ratio ◽  
Ease Of Use ◽  
Gas Condensate ◽  
Hydraulic Efficiency ◽  
Hydraulic Characteristics ◽  
Friction Characteristic ◽  
Excessive Pressure ◽  
Pressure Losses

Purpose: The purposes of this article are to study the effective ways of increasing the hydraulic efficiency of gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF); to calculate the operation efficiency of gas gathering pipelines of the Yuliivskyi OGCPF and develop a set of measures to monitor their condition and improve their hydraulic characteristics; to investigate the technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam, to perform the feasibility study on the prospects of its application in practice. Design/methodology/approach: The technology of cleaning the inner cavity of flowlines of gas-condensate wells with foam was investigated to objectively evaluate its application and determine the effectiveness of this measure. The research was carried out within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The results of production studies showed that due to cleaning the flowlines of gas-condensate wells (No.85 and No.60) from the accumulation of liquid, the coefficients of their hydraulic efficiency increased by 12% and 7%, respectively. Measures taken to clean the inner cavity of the flowlines from liquid have proven their efficiency and can be recommended for other flowlines of wells at other production fields. Research limitations/implications: Based on the characteristics of gas gathering pipelines, it is reasonable to conduct experimental studies on the use of the proposed technology of cleaning the inner cavity with foam in the case of increasing its multiplicity. Practical implications: Using the wells of the Yuliivske oil and gas condensate field as case studies, the operating parameters were measured and the pressure losses along the length of the flowlines were calculated. According to the results of calculations at two wells (No.85 and No.60), a significant excess of the actual value of the flow friction characteristic over the theoretical value was established. To reduce excessive pressure losses due to the presence of liquid and improve the hydraulic characteristics of the wells, their inner cavities were cleaned using foam with the expansion ratio from 40 to 100. Originality/value: It is important to note that the advantages of foam piston include: ease of use, no occurrence of hydraulic shocks and preventing stuck during movement in the gas pipeline, application in both straight and inclined sections, no wear of the elements of the cleaning equipment, a rather efficient cleaning of gas pipelines.

Experimental effectiveness studies of the technology for cleaning the inner cavity of gas gathering pipelines

2021 ◽  
Vol 2 (105) ◽  
pp. 61-77
Author(s):  
V.B. Volovetskyi ◽  
Ya.V. Doroshenko ◽  
O.S. Tarayevs'kyy ◽  
O.M. Shchyrba ◽  
J.I. Doroshenko ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Experimental Studies ◽  
Expansion Ratio ◽  
Efficiency Coefficient ◽  
Hydraulic Efficiency ◽  
Hydraulic Characteristics ◽  
Foam Expansion ◽  
Before And After ◽  
Reasonable Approach ◽  
Effectiveness Studies

Purpose: The purposes of the article are to determine the hydraulic efficiency of two gas gathering pipelines of the Yuliivskyi oil and gas condensate production facility (OGCPF) and develop a set of measures to increase it; to experimentally determine the efficiency of using foams to increase the hydraulic characteristics of the gas gathering pipelines in the Yuliivskyi OGCPF; to develop a set of measures that will help to improve the hydraulic characteristics of gas gathering pipelines. Design/methodology/approach: The research methodology consists in determining the hydraulic efficiency of gas gathering pipelines before and after cleaning their inner cavity with foams with different expansion ratios and comparing the obtained values, which allows to objectively assess the efficiency of this cleaning method. The studies were performed within the framework of research and development work by the specialists of the Ukrainian Scientific Research Institute of Natural Gases. Findings: The pilot testing was carried out to determine the efficiency of cleaning the inner cavity of gas gathering pipelines with foams with different expansion ratios. It showed positive results. It was determined that cleaning the inner cavity of gas gathering pipelines with foams with the expansion ratio from 80 to 90 led to an increase in the hydraulic efficiency coefficient by 10.5%, and with foams with the expansion ratio from 50 to 60 – by 5.7%. The measures taken to clean the inner cavity of gas gathering pipelines from liquid contaminations have proven their efficiency and can be recommended for other fields. Research limitations/implications: The obtained results show that it is reasonable to conduct the experimental studies on the efficiency of cleaning the inner cavity of gas gathering pipelines with the foams with higher expansion ratios. To achieve the maximum quality of cleaning the gas gathering pipelines, it is necessary to develop a new method that will combine the use of foam and gel piston.Practical implications: The performed experimental studies help to take a more reasonable approach to cleaning the inner cavity of gas gathering pipelines with foams and to predict in advance the effect of the foam expansion ratio on the hydraulic efficiency of gas gathering pipelines. Originality/value: The experimental studies on the effect of foam expansion ratios on the hydraulic efficiency of gas gathering pipelines are original.

Hydraulic Characteristics of Partial Opening of the Working Gate for a Discharge Tunnel

2007 ◽  
Vol 19 (4) ◽  
pp. 488-493 ◽  
Author(s):  
Jian-hua Wu ◽  
Shu-rong Feng ◽  
Wei-wei Wu ◽  
Shi-ping Ruan
Keyword(s):  
Hydraulic Characteristics ◽  
Discharge Tunnel ◽  
Partial Opening

Hydraulic Characteristics of Water-Wings for the Middle-Pier of a Discharge Tunnel

2006 ◽  
Vol 18 (5) ◽  
pp. 567-571 ◽  
Author(s):  
Jian-hua Wu ◽  
Chang-guang Cai ◽  
Wei Ji ◽  
Shi-ping Ruan
Keyword(s):  
Hydraulic Characteristics ◽  
Discharge Tunnel

scholarly journals Filtering Walls Мade of Sintered Metal Gauzes for Built-in Filters of Aviation Hydraulic Systems

2015 ◽  
Vol 4 (4) ◽  
pp. 39-45 ◽  
Author(s):  
Новиков ◽  
Yu. Novikov ◽  
Спиридонов ◽  
V. Spiridonov ◽  
Большаков ◽  
...  
Keyword(s):  
Surface Condition ◽  
Cold Deformation ◽  
Experimental Studies ◽  
Resistance Coefficient ◽  
Reduction Ratio ◽  
Theoretical Research ◽  
Hydraulic Systems ◽  
Hydraulic Characteristics ◽  
Deformation Degree ◽  
Contact Spots

Results of theoretical and experimental researches related to cold deformation degree influence when rolling on strength and hydraulic characteristics of metal gauzes used for production of built-in filters’ filtering walls have been presented. An analytical dependence of gauze’s permeation coefficient on the gauze’s reduction ratio and relative lengthening when rolling has been received based on ideal porous body’s capillary model. Theoretical research results have been compared with the experimental data obtained at filtration of compressed air and mineral oil through samples of gauzes with various degree of cold deformation. Experimental dependences of gauzes’ relative lengthening and strength limit on their cold deformation degree have been presented. Results of visual researches of deformed gauzes’ surface condition have been presented. A dependence of contact spots’ square at gauzes’ surfaces on reduction ratio has been received. The analysis of contact spots’ influence on hydraulic characteristics of the multilayered mesh material used for filtering walls production has been carried out. Results of experimental studies of gauzes’ hydraulic characteristics have been processed in the form of dimensionless dependence of hydraulic resistance coefficient on filtered environment stream’s Reynolds number.

Hydraulic Characteristics of Plug Energy Dissipater in Flood Discharge Tunnel

2009 ◽  
Vol 21 (6) ◽  
pp. 799-806 ◽  
Author(s):  
Zhong Tian ◽  
Wei-Lin Xu ◽  
Wei Wang ◽  
Shan-Jun Liu
Keyword(s):  
Hydraulic Characteristics ◽  
Discharge Tunnel ◽  
Flood Discharge ◽  
Energy Dissipater

scholarly journals Hydraulic characteristics of internal protective coatings used for rehabilitation of pipelines of water supply and sanitation systems

2018 ◽  
Vol 144 ◽  
pp. 02017 ◽  
Author(s):  
Vladimir Orlov
Keyword(s):  
Protective Coating ◽  
Protective Coatings ◽  
Experimental Studies ◽  
Organic Coatings ◽  
Hydraulic Characteristics ◽  
Water Transportation ◽  
Methodical Approach ◽  
Testing Bench ◽  
Sanitation Systems

The purpose of this article is to provide a comparative analysis of hydraulic characteristics of some modern organic coatings used for trenchless rehabilitation of engineering pipelines. Scotchkote 169HB pipeline inner protective coating manufactured by «3M» production company (USA) and Subcote FLP coating by «Group POLYPLASTIC» Ltd (RF) were the objects of this investigation. The article presents general characteristics of alternative protective coatings. A methodical approach to determination of the protective coating hydraulic characteristics is described by the tests at a special patented small-sized bench through estimation of the coatings’ hydrophoby with the terms of hydraulic characteristics. Based on the obtained results the conclusions are made concerning the feasibility of application of organic coatings compared to non-organic ones (for example, cement-sand coatings). This will enable power savings due to a lower hydraulic resistance during the water transportation. Based on the experimental studies in static and dynamic conditions on a small-sized testing bench it was proved, that the Subcote FLP protective coating has hydrophilic properties. There are shown results of an automated processing of experimental data and comparison of the values of the coefficients of hydraulic friction, resistivity and roughness, which have been obtained at the large-sized and small-sized benches, as well as at a roughness indicator. Provision has been made of a possible and reasonable use of small-sized benches instead of large-sized ones for determination of hydrophoby and hydraulic parameters, which will considerably facilitate the traditional method of comprehensive estimation of the hydraulic performance of various types of protective coatings.

Sign in / Sign up

Export Citation Format

Share Document