Boris Blyukher - Academia.edu (original) (raw)

Papers by Boris Blyukher

Applied Thermal Engineering, Oct 1, 2005

In cryogenic plants, systems involving different combinations of cryogenic pumps and storage vess... more In cryogenic plants, systems involving different combinations of cryogenic pumps and storage vessels are utilized to transport high pressure liquids and gases. Understanding the effective design and operations of such systems, referred to as CSRP (cryogenic system reservoir–pump), is of great interest as they contribute significantly to the capital cost, energy efficiency and operational reliability of the overall plant or

Air-fractionating units (AFU) intended for the recovery of oxygen, argon, nitrogen, and other air... more Air-fractionating units (AFU) intended for the recovery of oxygen, argon, nitrogen, and other air-fractlonatlng in the liquid and gaseous states by low-temperature fractionation are expensive, complex, and critical systems, including apparatus (containers and heat exchangers), pipelines and fittings, machinery units (pumps and expansion engines), and components of instrumentation and automation. The reliability of AFU is a most important index of their technical level, manufacturing quality, and utilization efficiency. To confirm the basic functional characteristics in the stage of serial manufacture and operation of AFU, control reliability tests are carried out, making it possible to solve the following problems: to verify the correspondence of the operating reliability indices to the specifications of technical standardization documentation; to find the least reliable module units and to obtain information for development of measures for their improvement to increase their reliability; to evaluate the reliability of purchased products (components), to verify the correspondence of their reliability indexes to the total reliability level of the units, and, if necessary, to outline design and technological measures to improve the reliability of components or to make a decision about their replacement; to improve the system of technical preventive maintenance; to determine the efficiency and economic appropriateness of further use of the units; to verify the appropriateness of the adopted design diagrams and decisions and the correctness of the choice of construction materials from the standpoint of assurance of the desired lifetime indexes; and to evaluate the manufacturing quality of the units in serial manufacture. The operating period of units operating continuously is 4320 h. A system of technical and planned preventive maintenance is provided in the period between operating periods. The AFU are restorable products, for which criteria have been established for efficiency, failure consequences, and the nature of their effect on the efficiency. The reliability of the AFU is determined by evaluation of the following indices: the operating time to failure Tf, the average time for restoration of the operational condition Tr, the technical-utilization Ttu, the average operating time for planned current repairs Topr, the average operating time until the first major repairs Tmr , and the average operating time until write-off Twr. The purpose of the present paper is a consideration of rational designs and results of statistical monitoring of the main indexes of reliability of AFU, which are functionally related or closely correlated with the operating expenses. Since the manufacture of medium- and high-pressure AFU is of small-scale nature, in planning the reliability tests we took into account the possibility of obtaining information on a sufficiently small number of tested units (small sample size). Three types of tellability-test designs (state standard GOST 27.410-83) are now widely used: with a limited number of failures, with limited time, and truncated serial designs. Each of these designs has a series of advantages and drawbacks, on the basis of whose analysis, with due regard TABLE 1

Chemical and Petroleum Engineering, Jun 1, 1998

ASSE Professional Development Conference and Exhibition, 1999

$Research paper thumbnail of Reliability tests of air-fractionating units$

Chemical and Petroleum Engineering, Apr 1, 1987

Chemical and Petroleum Engineering, Dec 1, 1976

Chemical and Petroleum Engineering, Nov 1, 1978

Aircraft noise is one of the subjects of environmental or community noise, which is a k... more Aircraft noise is one of the subjects of environmental or community noise, which is a kind of physical stressor on environment/community, which may produce a number of negative effects, including health impacts, as for humans as for environmental systems/objects (nonhuman impacts on environment). Among them are the following mostly recognized outcomes for humans: annoyance by noise (noise annoyance), sleep disturbance, direct health impacts, hearing loss (more important for occupational health protection), etc. Risk methodology is proposed to be used for assessment and control of aircraft noise impact on population located in airport vicinity.

Sustainable Aviation, 2019

Analytical modelling of system safety and risk methodology is used to describe the relationships ... more Analytical modelling of system safety and risk methodology is used to describe the relationships between the causes, dangers and effects of aircraft noise impact in various scenarios of aviation system development. Risk is assessed according to the hazard identification, associated with the probability of adverse events and their consequences, but the main emphasize is done on noise annoyance. The approach uses two types of risk in principle: individual and societal. A number of events must occur if a main stressor should take place with conditional probability of their realization. Dose-response function is applied to estimate the damage in an exposed receptor, and mathematically it gives a relationship between the intensity of the stressor and the effects in the exposed receptor. Framework for risk assessment and reduction concerning the control of a number of annoyed people by noise is proposed also. Hazard, vulnerability and coping capacity are interpreted in accordance with new requirements of the standard ISO 31000:2018.

: A device is described for liquefied gas pumping. The setup includes a pump placed in a containe... more : A device is described for liquefied gas pumping. The setup includes a pump placed in a container with the liquefied gas, and a heat exchanger-supercooler, the tubular space of which is connected with the intake line of the pump.

Journal of Pressure Vessel Technology, 2016

The main aim of the paper is to investigate and validate the behavior of a pipeline in the condit... more The main aim of the paper is to investigate and validate the behavior of a pipeline in the conditions of excavator elements external interference. A number of experimental tests were conducted. Four different cases were taken into account: two geometries of indenter with and without internal pressure. Discrete model of a tested pipe was developed and validated with the actual one. Simulations were performed using ls-dyna implicit code. The results obtained from the analyses were compared with the experimental tests and showed good accuracy in terms of force characteristics obtained in all simulated cases. Moreover, stress distribution in every case was also compared and discussed.

Risk and Reliability and Evaluation of Components and Machinery, 2004

ABSTRACT The paper presents results of preliminary experimental and numerical tests over research... more ABSTRACT The paper presents results of preliminary experimental and numerical tests over research and development of the numerical, FEM (Finite Elements Method) based method of pipeline strain/stress condition assessment with the use of data possessed from inline inspection tool. At the beginning, the research is focused on an example of a typical flaw which may be detected in oil or gas transporting pipeline by Geometry Measuring Pipeline Intelligent Gauge (Geo-PIG) during inline inspection. Such a typical flaws are dents and folds in the pipe which rests on a supporting concrete block or other type of saddle supporting system. The research method is based on numerical simulation and analysis. But it must be verified experimentally. For the needs of experimental verification of the numerical method tests were conducted at laboratory scale. Artificial dents, folds, and ovalizations were created with the use of material strength testing machine for samples of weldless thin walled pipe rested on specialized stand, simulating a saddle supporting system. The process of buckling during the three-point bending test took place close to the middle support with visible local buckling in the pipe wall. The experiment was conducted under the strict control, enabling measurements of deformations and strains in selected points located on external surface of the pipe wall. Since the Military University of Technology (MUT in Warsaw) itself is not a provider of inline surveys with the use of Pipeline Intelligent Gauge PIG), the substitutive equipment was used for deformation measurements on tested pipes with so called “digitizing arm” which was the analogue of the real inline inspection tool. The use of 3D digitizing arm was successful. The data collected with the use of this tool are coherent and may be used for verifications of FEM modeling. The preliminary numerical test models for the experiment simulation are also presented. The only disadvantage of laboratory tests was that they do not allow to conduct investigation on pressurized pipe for technical as well as for safety reasons. Experimental research on deformations and strains conducted for bent pipes will allow verifying strains and stress distributions obtained from numerical calculations. This will allow improving methods of numerical simulations.

Computer Technology and Applications, 2003

The method of pipeline inspection data usage for needs of numerical analysis of technical conditi... more The method of pipeline inspection data usage for needs of numerical analysis of technical condition of pipeline is considered. A real crude oil pipeline was taken into considerations to make numerical assessment of stress state in case of large deformations which were measured by an intelligent caliper inspection tool. The pipeline was rested on concrete supporting blocks in a boggy terrain. The tool detected very large deformations of the pipe in the areas of these supports which were caused by washouts. Data from the tool were processed into the format readable for MSC/PATRAN-graphical pre-processor of the computational system MSC/NASTRAN based on the Finite Element Method – FEM. Then a mesh of discrete model was generated by means of MSC/PATRAN.

Volume 7: Operations, Applications, and Components, 2005

The paper presents results of experimental and numerical tests over research and development of t... more The paper presents results of experimental and numerical tests over research and development of the numerical Finite Elements Method (FEM) based methods of pipeline strain/stress condition assessment. The research is inspired by certain circumstances accompanying domain of safe exploitation of pipeline systems used for gas and crude oil transportation [1]. Currently, we observe the increase in hazard originated not only by typical pipeline operations but the third party activities understood as terrorist threats and warfare activities, especially in regions that are of significant value for the stability of the world’s energy supplies. Methods used in the scope of the research may be applied also to such events as disturbances of normal pipeline operation by seismic or mining activities, as they need the analysis of shock waves influence on pipeline installations. Elements of these methods may be used in wider range of construction types like pipelines in power plants (especially nu...

Volume 7: Operations, Applications and Components, 2007

ABSTRACT Results of numerical analyses of pipe section subjected to a three-point bending test en... more ABSTRACT Results of numerical analyses of pipe section subjected to a three-point bending test enable numerical evaluation of deformation and analysis of the state of stress in both the contact area and that with imperfections. In the analysed instances plastic deformations of the object under examination is what we have to deal with. In the engineering practice such states could occur where the pipe contacts some other object(s) or when one pipe lies upon the other one. What happens is local loss of stability of the pipe’s cross-section. In consequence, effected are any kinds of folds or concavities.

Volume 7: Operations, Applications, and Components, 2006

ABSTRACT The results of numerical simulations of some selected states of loading the pipelines wi... more ABSTRACT The results of numerical simulations of some selected states of loading the pipelines within the non-linear range, with account taken of large displacements and deformations, are described in this paper. Numerical analyses resulted in sizes of deformations, strains and stresses, which further on were used to conduct comparative analysis with results effected by tests carried out on a testing stand under laboratory conditions. At points where the pipeline is supported with pipe bearers, various kinds of dents, folds, ovalisations of the pipeline’s cross-section may occur so that results of numerical simulations enable evaluation of deformation sizes in a real pipeline structure.

Pressure vessel and piping systems are widely used throughout industry and research laboratories ... more Pressure vessel and piping systems are widely used throughout industry and research laboratories and contain a very large concentration of energy, and yet, despite the fact that their design and installation comply with federal, state and local regulations and recognized industrial standards, there continue to be serious pressure equipment failures. There are many reasons for pressure equipment failure: degradation and