Influence of rheological properties of the working medium on indicators of turbine flow converters

2021 ◽  
pp. 78-87
Author(s):  
Олег Васильевич Аралов ◽  
Владимир Олегович Ломакин ◽  
Николай Владимирович Чувиков ◽  
Иван Владимирович Буянов ◽  
Никита Васильевич Бережанский
Keyword(s):  
Rheological Properties ◽  
Kinematic Viscosity ◽  
Experimental Studies ◽  
Chemical Properties ◽  
Volumetric Flow Rate ◽  
Measurement Range ◽  
Volume Flow ◽  
Oil Products ◽  
Measuring Instruments ◽  
Working Medium

Изучение влияния реологических свойств нефти и нефтепродуктов на метрологические характеристики турбинных преобразователей расхода (ТПР) является актуальной научно-практической задачей, имеющей определяющее значение для производства средств измерений турбинного типа. Цель статьи - проведение и анализ результатов экспериментальных исследований по оценке зависимости относительного отклонения коэффициентов преобразования ( К ) ТПР от физико-химических свойств рабочей среды и условий перекачки. Исследования проведены на специализированном калибровочном стенде и трех системах измерений количества и показателей качества нефти (нефтепродуктов). По результатам корреляционного анализа выявлено, что наибольшее влияние на количество оборотов ТПР оказывает кинематическая вязкость и плотность рабочей среды. Показано, что при изменении объемного расхода и кинематической вязкости на одном объекте возможно прогнозирование изменения К ТПР во всем диапазоне объемного расхода, основываясь на значениях числа Re. Установленная на объекте эксплуатации градуировочная характеристика ТПР позволяет определить нижний предел диапазона измерений объемного расхода ТПР на основе значений К , рассчитанных в точках объемного расхода при текущем значении кинематической вязкости. The study of the influence of rheological properties of oil and oil products on the metrological characteristics of turbine flow converters (TFC) is a vital scientific and practical task that is significant for manufacturing turbinetype measuring instruments. The purpose of the article is to conduct and analyse the results of experimental studies on the assessment of dependence of the relative deviation of the TFC transformation ratio ( C ) on the physical and chemical properties of working medium and pumping conditions. The studies were performed using a special calibration stand and three systems for measuring the quantity and quality indicators of oil (oil products) used in the main pipeline transportation system. Based on the results of the correlation analysis it was observed that the temperature and viscosity of the working medium have the greatest influence on the number of TFC revolutions. It was shown that with the change of volumetric flow rate and kinematic viscosity on a single facility it is possible to forecast changes of C of TFC over the whole range of volume flow based on the values of the Re number. The calibration characteristic of the turbine flow converter installed at the operation site allows you to determine the lower limit of the measurement range of the TFC volume flow, based on the C , values calculated at the volumetric flow points at the current value of the kinematic viscosity.

Key Research Insights into Dependence Between Turbine Flow Transducer Conversion Coefficients and Reynolds Number

2021 ◽  
pp. 28-42
Author(s):  
O.V. Aralov ◽  
I.V. Buyanov
Keyword(s):  
Reynolds Number ◽  
Flow Rate ◽  
Kinematic Viscosity ◽  
Experimental Studies ◽  
Volumetric Flow Rate ◽  
Climatic Conditions ◽  
Oil Products ◽  
Flow Transducer ◽  
Test Conditions ◽  
Conversion Coefficients

The paper focuses on the key findings of the first experimental studies on assessing the dependence of the relative deviation of the conversion coefficients of the turbine flow transducer KTFT on the physicochemical properties of oil and oil products, as well as test conditions. The studies were carried out on a specialized calibration stand and on three systems for measuring the quantity and quality indicators of oil / oil products, operated in the main pipeline transport under various climatic conditions. Relying on the obtained experimental data, we assessed the influence of test conditions on KTFT and established correlation dependences between the kinematic viscosity, density, temperature and excess pressure. The study shows that the kinematic viscosity and density of the working medium, i.e., oil / oil products, as well as the Reynolds number Re, have the greatest influence on KTFT. Furthermore, with a change in the volumetric flow rate and kinematic viscosity at one object, it is possible to predict the change in KTFT in the entire range of the volumetric flow rate, relying on Re values. Findings of research show that the tested turbine flow transducer DN 250-1.6 can be operated when Re > 7600

Studying dispersed and rheological properties of hydrocarbon-containing acid emulsions and their efficiency in removing asphalt-resin-paraffin deposits

2020 ◽  
pp. 128-139
Author(s):  
M. Yu. Shumakher ◽  
V. V. Konovalov ◽  
A. P. Melnikov
Keyword(s):  
Aqueous Solution ◽  
Hydrochloric Acid ◽  
Rheological Properties ◽  
Reaction Rate ◽  
Experimental Studies ◽  
Efficient Removal ◽  
Reservoir Properties ◽  
Hydrocarbon Solvents ◽  
Formation Zone ◽  
Effect Of The Composition

Currently, the treatment of the bottomhole formation zone with acidic compositions is one of the most common methods to intensify the oil inflow. The use of various modified acid compositions increases the efficiency of acid treatments on the bottomhole formation zone. Acid compositions, including those containing hydrocarbon solvents, which contribute to more efficient removal of organic colmatants, affect the reaction rate of the reagent with the rock and processing equipment, change the reservoir properties, etc.The article presents the results of experimental studies, which are aimed at establishing the effect of the composition of hydrocarbon-containing acidic emulsions consisting of an aqueous solution of hydrochloric acid, toluene and Neonol AF 9-10 on their dispersed and rheological properties, as well as their efficiency in removing paraffin deposits.

Enhancing Rheological Properties and Reduction of Total Acid Number of a Heavy Crude Oil Using Ethanol and Trona

2021 ◽  
Author(s):  
Ahmed Almadhaji ◽  
Mohammed Saeed ◽  
Hitham Ibrahim ◽  
Anas Ahmed ◽  
Ragaei Maher
Keyword(s):  
Crude Oil ◽  
Rheological Properties ◽  
Kinematic Viscosity ◽  
Acid Number ◽  
Capillary Viscometer ◽  
Heavy Crude Oil ◽  
Production Operation ◽  
Total Acid ◽  
Total Acid Number ◽  
Heavy Crude

Abstract One of Sudanese fields has a heavy crude oil which has a high Total Acid Number (TAN) and high viscosity, can cause a lot of problems in production operation, transport, and storage facilities. The effect of ethanol dilution on the rheological properties of crude (especially the kinematic viscosity) was studied and presented. Moreover, the consequence of blending Trona (NaHCO3.Na2CO3) with a specified amount of Ethanol in the crude can reduce (TAN) to acceptable limits for solving corrosion and flowability problems. The approach is based on the experiments and laboratory works on the crude's samples after blending with a certain amount of Trona and Ethanol. It depends on the results of apparatuses, that are used to measure the samples, for instance, Calibrated glass capillary viscometer and ASTM D664 titration volume Total Acid Number tester which are employed to get the values of kinematic viscosity and TAN, respectively. The tests are established with crude have kinematic viscosity (187 cst) at temperature 75°C and TAN almost (8.51). While increasing the dosage of Trona at the ambient temperature (38°C) with the certain mass percentage of Ethanol (5%), TAN is decreased from (8.51 to 4.00 mgKOH/g). Also, the kinematic viscosity is declined from (187 cst to 96.75 cst) after increasing the volume of Ethanol at 75°C. These outcomes indicated that Ethanol could reduce Sudanese heavy crude's viscosity, and the Trona could decrease the TAN. This reduction occurred due to Ethanol dilution. The Ethanol molecules disturb the molecular structure of the crude, which forms polar bond within the hydrocarbon chain that leads to lower the friction between molecules of hydrocarbon in the crude. Also, Trona shrinks TAN because the Hydroxide ions (OH+) that founded in Trona neutralize the Hydrogen ions (H−) in Naphthenic acid in Sudanese heavy crude. This study can be summarized in the ability to solve the difficulty of transporting and processing the heavy crude oil in refineries; maintains the quality of the crude while utilizing it with friendly environmental materials and low cost.

scholarly journals Effect of Temperature and Used Ingredients on Rheological Parameters of Pancake Dough

2013 ◽  
Vol 16 (3) ◽  
pp. 63-66
Author(s):  
Peter Hlaváč ◽  
Monika Božiková
Keyword(s):  
Rheological Properties ◽  
Dynamic Viscosity ◽  
Kinematic Viscosity ◽  
Fat Content ◽  
Effect Of Temperature ◽  
Rheological Parameters ◽  
Rotational Viscometer ◽  
Two Samples ◽  
Dynamic And Kinematic Viscosity ◽  
Temperature Dynamic

Abstract This paper presents the selected rheological properties of pancake dough such as dynamic and kinematic viscosity and fluidity. The effect of used ingredients and temperature on rheological properties is investigated. Measurements were performed on three pancake dough samples. In two samples, there was used milk with a different fat content, and in the third sample, all ingredients were in a powder state. A digital rotational viscometer Anton Paar DV-3P was used for measuring the rheological properties. The principle of viscometer measurement is based on the dependence of sample resistance to probe rotation. Results of measurements are shown as graphical dependencies of rheological parameters on temperature. Exponential functions were used to express the dependencies of all rheological parameters on temperature. Dynamic and kinematic viscosity decreased, and fluidity increased with temperature. The highest values of dynamic viscosity were obtained for pancake dough from powder ingredients. A higher fat content of used milk caused higher values of dynamic viscosity.

scholarly journals Prediction of Formation Damage, Fluid Loss and Rheological Properties of Water Based Mud with Corn Cob

2020 ◽  
Vol 5 (10) ◽  
pp. 1269-1273
Author(s):  
Godwin Chukwuma Jacob Nmegbu ◽  
Bright Bariakpoa Kinate ◽  
Bari-Agara Bekee
Keyword(s):  
Rheological Properties ◽  
High Pressures ◽  
Chemical Properties ◽  
Analytical Models ◽  
Formation Damage ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Corn Cob ◽  
Core Samples ◽  
Water Based

The extent of damage to formation caused by water based drilling mud containing corn cob treated with sodium hydroxide to partially replace polyanionic cellulose (PAC) as a fluid loss control additive has been studied. Core samples were obtained from a well in Niger Delta for this study with a permeameter used to force the drilling mud into core samples at high pressures. Physio-chemical properties (moisture content, cellulose and lignin) of the samples were measured and the result after treatment showed reduction. The corn cob was combined with the PAC in the ratio of 25-75%, 50-50% and 75-25% in the mud. Analyzed drilling mud rheological properties such as plastic viscosity, apparent viscosity, yield point and gel strength all decreased as percentage of corn cob increased in the combination and steadily decreased as temperature increased to 200oF. Measured fluid loss and pH of the mud showed an increase in fluid loss and pH in mud sample with 100% corn cob. The extent of formation damage was determined by the differences in the initial and final permeability of the core samples. Experimental data were used to develop analytical models that can serve as effective tool to predict fluid loss, rheological properties of the drilling mud at temperature up to 200oF and percentage formation damage at 100 psi.

scholarly journals EVALUATION OF HYDROPHILIC GLOBULES WITH SODIUM ALGINATE CONTAINING A LACTIC ACID– CHITOSAN COMPLEX

2021 ◽  
Vol 26 ◽  
pp. 170-177
Author(s):  
Katarzyna Małolepsza-Jarmołowska ◽  
Keyword(s):  
Lactic Acid ◽  
Rheological Properties ◽  
Sodium Alginate ◽  
Contact Time ◽  
Experimental Studies ◽  
Vaginal Mucosa

An important issue in the treatment of vaginitis is the amount of time the drug remains on the vaginal mucosa. If the contact time is too short, the drug cannot work effectively to ensure the correct pH in the vaginal environment. This study evaluated formulations of globules containing sodium alginate, lactic acid and chitosan with different pH and rheological properties. The experimental studies revealed that it is possible to produce a preparation with optimal pharmaceutical and application properties. The use of an appropriate ratio of lactic acid to chitosan in the complex and the appropriate concentration of sodium alginate produces a preparation with excellent properties to coat the surface of the vaginal mucosa.

scholarly journals Research on Physico-Chemical Properties of Diethyl Ether/Linseed Oil Blends for the Use as Fuel in Diesel Engines

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6564
Author(s):  
Krzysztof Górski ◽  
Ruslans Smigins ◽  
Rafał Longwic
Keyword(s):  
Surface Tension ◽  
Low Temperature ◽  
Diethyl Ether ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Kinematic Viscosity ◽  
Linseed Oil ◽  
Chemical Properties ◽  
Fuel Blends ◽  
Physico Chemical

Physico-chemical properties of diethyl ether/linseed oil (DEE/LO) fuel blends were empirically tested in this article for the first time. In particular, kinematic viscosity (ν), density (ρ), lower heating value (LHV), cold filter plugging point (CFPP) and surface tension (σ) were examined. For this research diethyl ether (DEE) was blended with linseed oil (LO) in volumetric ratios of 10%, 20% and 30%. Obtained results were compared with literature data of diethyl ether/rapeseed oil (DEE/RO) fuel blends get in previous research in such a way looking on differences also between oil types. It was found that DEE impacts significantly on the reduction of plant oil viscosity, density and surface tension and improve low temperature properties of tested oils. In particular, the addition of 10% DEE to LO effectively reduces its kinematic viscosity by 53% and even by 82% for the blend containing 30% DEE. Tested ether reduces density and surface tension of LO up to 6% and 25% respectively for the blends containing 30% DEE. The measurements of the CFPP showed that DEE significantly improves the low temperature properties of LO. In the case of the blend containing 30% DEE the CFPP can be lowered up to −24 °C. For this reason DEE/LO blends seem to be valuable as a fuel for diesel engines in the coldest season of the year. Moreover, DEE/LO blends have been tested in the engine research. Based on results it can be stated that the engine operated with LO results in worse performance compared with regular diesel fuel (DF). However, it was found that these disadvantages could be reduced with DEE as a component of the fuel mixture. Addition of this ether to LO improves the quality of obtained fuel blends. For this reason, the efficiency of DEE/LO blend combustion process is similar for the engine fuelled with regular diesel fuel. In this research it was confirmed that the smoke opacity reaches the highest value for the engine fuelled with plant oils. However, addition of 20% DEE reduces this emission to the value comparable for the engine operated with diesel fuel.

Research on Aging Characteristics and Chemical Composition of Hydrogenated Transformer Oil

2012 ◽  
Vol 614-615 ◽  
pp. 1131-1137 ◽  
Author(s):  
Xu Dong Ouyang ◽  
Yi Hua Qian ◽  
Wei Su ◽  
Yi Bin Huang
Keyword(s):  
Chemical Composition ◽  
Electrical Properties ◽  
Dielectric Loss ◽  
Loss Factor ◽  
Kinematic Viscosity ◽  
Chemical Properties ◽  
Dielectric Loss Factor ◽  
Transformer Oil ◽  
Composition Variation

Under the condition of Baader aging, the chemical composition variation and the effect of transformer oil aging on electrical properties such as dielectric loss factor and physic-chemical properties such as kinematic viscosity were studied during aging. Moreover, the correlation between hydrogenated transformer oil electrical and physic-chemical properties and its chemical composition variation were investigated.

Ensuring the Reliability of an Aircraft Engine Hydraulic System

2014 ◽  
Vol 616 ◽  
pp. 126-134 ◽  
Author(s):  
Janka Mihalčová ◽  
Peter Šmeringai
Keyword(s):  
Hydraulic System ◽  
Kinematic Viscosity ◽  
Chemical Properties ◽  
Aircraft Engine ◽  
Hydraulic Fluid ◽  
Aircraft Engines ◽  
Ftir Analysis ◽  
Physical Chemical ◽  
Hydraulic Fluids ◽  
Degradation Degree

The article deals with the issue of ensuring the reliability of aircraft engines operation via hydraulic fluids properties monitoring. There are presented the results of the hydraulic fluid Aero Shell Fluid 41 (ASF 41) properties evaluation in the hydraulic system of a double-flow turbosupercharged aircraft engine AI-25TL. In the hydraulic fluid, there were observed the quantity and distribution of mechanical particles according to their size in accordance with the ISO Cleanliness Code, ISO 4406.There was also determined kinematic viscosity according to the standard EN ISO 3104+AC. FTIR analysis of the infrared spectrum was used to determine the degradation degree of the hydraulic fluid physical-chemical properties.

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