scholarly journals Stucco repair method for enclosing brick walls

2019 ◽  
Vol 135 ◽  
pp. 03047
Author(s):  
Alexandr Zholobov ◽  
Nadezhda Ivannikova ◽  
Olga Razinkova ◽  
Peter Dukhanin
Keyword(s):  
High Efficiency ◽  
Wall Structure ◽  
Brick Wall ◽  
Test Results ◽  
Repair Method ◽  
Internal Surfaces ◽  
Strong Adhesion ◽  
Additional Process ◽  
The Russian Federation ◽  
Repair Techniques

During the operation of buildings, plaster coatings of the external and internal enclosing surfaces of brick walls are subjected to various destructive influences. Existing methods of repairing plaster coatings do not fully ensure strong adhesion of the material of the repair layer of plaster to the surface of the repaired brick wall structure. In addition, these methods can only get rid of damage but do not improve the operational properties of the plaster layer of the repaired structure. Thus, the urgent problem is the development of an effective method of repairing plaster coatings on the surfaces of brick walls, due to which it will become possible to ensure the monolithic of the repaired plastering structure. In order to address the shortcomings of the existing plaster coating repair techniques on the surfaces of the brick walls and finding ways to improve it, by the authors investigated the possibility and the expediency of performing the repair of additional process steps. A feature of this repair method is the use of preheated plaster mortar, flexible plaster molding, as well as compaction of the stucco mortar in the contact area with the repaired brick wall structure with a deep plate compactor. The test results of samples of plaster coatings manufactured by the proposed method showed the high efficiency and feasibility of using this method for repairs on the external and internal surfaces of walling of brick walls and are mentioned in the patent for the invention of the Russian Federation. The performance characteristics of the plaster are significantly increased as a result of the application of this method, and, consequently, the service life of the plaster coating is increased several times.

scholarly journals The use of the method of controlling the electrochemical parameters of aqueous solutions to combat complications in the operation of oil field pipelines

2021 ◽  
Vol 225 ◽  
pp. 01008
Author(s):  
Oleg Latypov ◽  
Sergey Cherepashkin ◽  
Dina Latypova
Keyword(s):  
Aqueous Solutions ◽  
Oil And Gas ◽  
High Efficiency ◽  
Oil Field ◽  
Oil Fields ◽  
Control Methods ◽  
Test Results ◽  
Chemical Reagents ◽  
Electrochemical Parameters ◽  
Very High

Corrosion of equipment in the oil and gas complex is a global problem, as it contributes to huge material costs and global disasters that violate the environment. Corrosion control methods used to protect equipment do not always ensure the absolute safety of the operation of oil and gas facilities. Moreover, they are quite expensive. The developed method for controlling the electrochemical parameters of aqueous solutions to combat complications during the operation of oil-field pipelines provides the necessary protection against corrosion. The method is economical and environmentally friendly, since it does not require the use of chemical reagents. The test results have shown a very high efficiency in dealing with complications in oil fields.

scholarly journals Load characteristics of three-plunger pumps for spray seawater fire-fighting

2020 ◽  
pp. 142-146
Author(s):  
В.А. Наумов ◽  
Н.Л. Великанов ◽  
А.В. Тришина
Keyword(s):  
Satisfactory Agreement ◽  
Test Data ◽  
High Efficiency ◽  
Measurement Data ◽  
Fire Fighting ◽  
Test Results ◽  
Hydraulic Characteristics ◽  
Fire Extinguishing ◽  
Load Characteristics ◽  
Low Pressures

Цель статьи – получить эмпирические зависимости для характеристик трехплунжерных противопожарных насосов (ТПН), необходимые для автоматизации расчетов систем тушения пожаров на судах с применением распыленной морской воды. Задачи исследования: проверка непротиворечивости данных испытаний; определение расчетных зависимостей производительности ТПН, к.п.д., затраченной мощности от давления. Проведенный анализ результатов испытаний ТПН подтвердил возможность использования предложенных зависимостей в инженерных расчетах. Данные измерений удовлетворительно согласуются с результатами расчетов, за исключением к.п.д. Отклонение экспериментальных точек от эмпирических зависимостей, скорее всего, связано с занижением значений затраченной мощности на испытаниях при небольших давлениях. Предложено для оценки к.п.д. использовать ранее полученную типовую зависимость. Построены графики для характеристик насоса NP25/41-170S. Пример расчета рабочей точки насосной установки с использованием приближенной гидравлической характеристики водяной пожарной системы судна показал высокую эффективность предложенных методик. The purpose of the article is to obtain empirical dependences for the characteristics of three-plunger fire-fighting pumps (TFP), which are necessary for automating calculations of fire extinguishing systems on ships using sprayed seawater. Research objectives: checking the consistency of test data; determining the calculated dependences of the TFP performance, efficiency, power expended on pressure. The analysis of the TFP test results confirmed the possibility of using the proposed dependencies in engineering calculations. The measurement data are in satisfactory agreement with the results of calculations, with the exception of efficiency. The deviation of experimental points from the empirical dependences is most likely due to an underestimation of the power consumed during tests at low pressures. It is proposed to use the previously obtained typical dependence to estimate the efficiency. Graphs are plotted for the characteristics of the NP25/41-170S pump. An example of calculating the working point of a pumping unit using the approximate hydraulic characteristics of the ship's water fire system showed the high efficiency of the proposed methods.

scholarly journals Study on the Turbine Vane and Blade for a 1500°C Class Industrial Gas Turbine

1993 ◽  
Author(s):  
S. Amagasa ◽  
K. Shimomura ◽  
M. Kadowaki ◽  
K. Takeishi ◽  
H. Kawai ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Film Cooling ◽  
High Efficiency ◽  
Development Program ◽  
Test Results ◽  
Directionally Solidified ◽  
Barrier Coating ◽  
Turbine Vane ◽  
Nickel Base ◽  
Industrial Gas Turbine

This paper describes the summary of a three year development program for the 1st stage stationary vane and rotating blade for the next generation, 1500°C Class, high efficiency gas turbine. In such a high temperature gas turbine, the 1st turbine vane and blade are the most important hot parts. Full coverage film cooling (FCFC) is adopted for the cooling scheme, and directionally solidified (DS) nickel base super-alloy and thermal barrier coating (TBC) will be used to prolong the creep and thermal fatigue life. The concept of the cooling configuration, fundamental cascade test results and material test results will be presented.

Multifunctional films with a highly oriented “nano-brick wall” structure by regulating modified TiO2@graphene oxide/poly(vinyl alcohol) nanocomposites

Nanoscale ◽  
2019 ◽  
Vol 11 (15) ◽  
pp. 7424-7432 ◽  
Author(s):  
Shumeng Bi ◽  
Ling Zhang ◽  
Chunzhong Li
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Wall Structure ◽  
Poly Vinyl Alcohol ◽  
Brick Wall

A multifunctional film based on a modified TiO2@GO/PVA nanocomposite with a multilayer nano-brick wall structure is fabricated by a facile approach.

Numerical Simulation and Experimental Study of a Two-Floor Structure Pumping System

2010 ◽  
Author(s):  
Chao Liu ◽  
Yan Jin ◽  
Jiren Zhou ◽  
Fangping Tang
Keyword(s):  
Numerical Simulation ◽  
Simple Structure ◽  
High Efficiency ◽  
Test Results ◽  
Pumping System ◽  
Performance Curves ◽  
The Standard Model ◽  
Floor Structure ◽  
Low Efficiency ◽  
Good Agreement

The two-floor flow passages pumping system with the simple structure is well practical in the Basin of Yangzi River downstream. However, this kind of pumping system has some disadvantages, such as low efficiency, easy to appear submerse vortex in discharge flow passages which causes the unit vibration and does harm to the operating of pump unit. In order to solve these problems, the design scheme with a new curve of diffusing outlet structure and inlet cone put forward, which are used in the renovation of the two-floor flow passages pumping station. With the numerical simulation of the two-floor flow passages pumping system, the flow fields are analyzed, and the external performance curves are obtained. To verify the calculation, a model tests were done using the standard model of pump. The test results are compared with the performance curves of numerical simulation. Good agreement of two results is found in the high efficiency area, which can show the calculation is believable. The new design improves the efficiency of pumping system significantly and eliminates the submerse vortex, also can guarantees the economy and security of operating.

Investigation of Steam Turbine Nozzle and Blading Efficiency

1940 ◽  
Vol 144 (1) ◽  
pp. 147-164 ◽  
Author(s):  
F. Dollin
Keyword(s):  
Reynolds Number ◽  
Steam Turbine ◽  
High Efficiency ◽  
Dynamic Test ◽  
Mathematical Expression ◽  
Physical Significance ◽  
Dynamic Efficiency ◽  
Test Results ◽  
Turbine Efficiency ◽  
Dynamic Methods

The paper describes the essential characteristics of the passages forming the fixed and moving elements of multistage high-efficiency turbines, whether impulse or reaction. The problems of nozzle investigations by static and dynamic methods are discussed, and a new nozzle tester is described. Reference is made to the Reynolds number; its physical significance is explained, and experimental results are used to demonstrate its effectiveness as a correlative factor. The significance of the static (nozzle) efficiency and the dynamic (turbine) efficiency is discussed, and the essentially different way in which they are affected by the discharge angle is pointed out. A mathematical expression is derived for the relation between static and dynamic efficiency for 50 per cent reaction blading as a function of the discharge angle. This, in conjunction with the Reynolds number, is used to demonstrate the unity and consistency of static and dynamic test results which at first sight seem to be conflicting or unrelated.

scholarly journals Air reverse circulation at the hole bottom in ice-core drilling

2019 ◽  
Vol 65 (249) ◽  
pp. 149-156 ◽  
Author(s):  
ZHENGYI HU ◽  
PAVEL TALALAY ◽  
ZHICHUAN ZHENG ◽  
PINLU CAO ◽  
GUITAO SHI ◽  
...  
Keyword(s):  
High Efficiency ◽  
Ice Core ◽  
Ice Cores ◽  
Test Results ◽  
Core Drilling ◽  
Low Energy Consumption ◽  
Reverse Circulation ◽  
Drilling System ◽  
Conventional Drilling ◽  
Hole Bottom

ABSTRACTIce-core drilling to depths of 200–300 m is an important part of research studies concerned with paleoclimate reconstruction and anthropogenic climate change. However, conventional drilling methods face difficulties due to firn permeability. We have developed an electromechanical ice-core drill with air reverse circulation at the hole bottom. We believe that the new drilling system will recover ice cores faster than shallow auger drills, with high efficiency and low energy consumption. The theoretically estimated up-hole speed of the airflow should be not <7.7 m s−1 to allow proper removal of ice cuttings from the borehole bottom. The computer simulation and test results showed that the design of the new ice-coring drill is feasible. The maximum allowed penetration rate depends by square law on airflow.

A cyano-bridged molecular magnet with a novel two-dimensional brick wall structure

2000 ◽  
pp. 1309-1310 ◽  
Author(s):  
Hui-Zhong Kou ◽  
Song Gao ◽  
Bao-Qing Ma ◽  
Dai-Zheng Liao
Keyword(s):  
Wall Structure ◽  
Molecular Magnet ◽  
Brick Wall ◽  
Two Dimensional

The level of pedagogical culture as the basis of professional activity of the head of the internal Affairs body of the Russian Federation

2020 ◽  
Vol 5 (2) ◽  
pp. 200-209
Author(s):  
Ekaterina Sumina ◽  
Oksana Dobrynina
Keyword(s):  
Russian Federation ◽  
High Efficiency ◽  
Professional Activity ◽  
Pedagogical Skills ◽  
Mere Presence ◽  
Integral Element ◽  
The Russian Federation ◽  
Internal Affairs ◽  
Managerial Activity ◽  
Pedagogical Culture

the article deals with the management activities of the head of the internal affairs bodies of the Russian Federation. The main professionally important qualities of the head influencing his professional activity are highlighted. An ideal model of the pedagogically cultural personality of the head of the internal affairs body of the Russian Federation is proposed, which is a set of those properties that must be formed by the head. This model consists of a number of subsystems that are the main dialectically interconnected and interdependent structural elements; pedagogical skills, active life position, knowledge and understanding of pedagogical phenomena, pedagogical conviction. The article discusses the views of a number of scientists regarding the pedagogical culture of the leader. The pedagogical culture is considered as an integral element of the set of professionally important qualities of the head of the internal affairs body of the Russian Federation. The authors conclude that the mere presence of professionally important qualities in a person cannot ensure the high efficiency of managerial activity if, in the process of training and preparation for managerial activity, they were not developed to the highest level - professionalism.

Hollow nanoparticle nanotubes with a nanoscale brick wall structure of clay mineral platelets

2007 ◽  
pp. 1366 ◽  
Author(s):  
Robin H. A. Ras ◽  
Teemu Ruotsalainen ◽  
Katri Laurikainen ◽  
Markus B. Linder ◽  
Olli Ikkala
Keyword(s):  
Clay Mineral ◽  
Wall Structure ◽  
Brick Wall
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