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Hydrodynamic Processes in Pipelines

#G-603


Developing New Means of Stabilization of Hydrodynamic Processes in Pipelines during Multiphase Hydroaeromixture Transportation

Tech Area / Field

  • SAT-SUF/Surface Transportation/Space, Aircraft and Surface Transportation
  • PHY-NGD/Fluid Mechanics and Gas Dynamics/Physics

Status
3 Approved without Funding

Registration date
03.10.2000

Leading Institute
G. Tsulukidze Mining Institute, Georgia, Tbilisi

Collaborators

  • STI International Associates, USA, CA, San Rafael

Project summary

Hydrodynamic processes in pressure pipelines appear in any case of real drop liquid transportation.

The character of the normal course of analogous processes and the significance of amplitudinal-frequency characteristics depends on the causes of their occurrence and, mainly, on the physico-mechanical properties of liquid medium as well as the walls enclosing them (pipelines).

The speed of the disturbance wave distribution in the pipeline is the main hydrodynamic parameter defining the volume of amplitude and frequency, as well as other parameters. The methods of defining this parameter during single-phase liquid (mainly water) movement in pipeline has been elaborated by well-known researchers.

Hydrodynamic processes with abrasive hard particles and free,not dissolved in water, air present in the water stream are difficult for analysis. Up to the present time there is no unique opinion among scientists on establishing methodological basis for defining hydrodynamic parameters. In this case pipeline hydroabrasive wear, uneven both along its circumference and length, is a significant factor affecting the character of hydrodynamic processes and the volume of hydrodynamic parameters.

The presence of hard abrasive particles in the water stream preconditions specific conditions and means of the processes stabilization, since their presence causes a speedy wear of the working organs of analogous appliances, which significantly reduces their effectiveness and reliability.

At the G. Tsulukidze Institute of Mining Mechanics there is a pipeline transport laboratory functioning for over 30 years. The laboratory is staffed with well-known scientists in this field, who have implemented fundamental research on studying hydrodynamic processes in pressure pipelines during multiphase hydrmixtures transportation. They have published a great many monographs and scientific articles, worked out means of hydrodynamic processes stabilization and raising the longevity and reliability of pipelines of hydrotransport systems.

The main aim of the present Project is to develop new equipment and means of stabilizing hydrodynamic processes in pressure pipelines during multiphase hydroaeromixture transportation and methods of calculating their main working parametres. Another aim is to develop methods of calculating hydrodynamic parametres of multiphase hydroaeromixture currents considering the influence of each phase (component) on their significance and the regularity of pipelines hydroabrasive wear both by perimetre and the mains length.

The problem is rather actual. In spite of being the newest kind of transport and having acquired a wide recognition in the recent decades, at the present time pressure hydrotransport is successfully functioning in almost all countries of the world in different fields of industry and agriculture. To stabilize hydrodynamic processes, up to the present time, these systems have mostly employed means designed for the systems transporting single-phase non-abrasive and non-aggressive liquids. This is the reason of frequent accidents in hydrotransport systems, since the means employed are incapable of functioning effectively in hydrotransport systems due to the above-mentioned causes. These frequent serious accidents cause the pipeline, pipeline steel framework, pumps etc. damage, hence, long-term stoppage of the systems, as well as environmental pollution. From the above-said we can conclude, that the Project aims to achieve ecological and ensure an economic effect. It has been established, that (according to the data of the former Soviet Union industrial hydrotransport systems) the average economic damage caused by hydraulic shock incidence constituted annually approximately $ 300,000 per one major industrial object. Considering the scope of employing hydrotransport systems, in the case of hydrodynamic processes stabilization in pressure pipelines during multiphase hydroaeromixture transportation, a significant economic effect can be achieved.

The scientific value of the Project lies in developing original methods of hydrodynamic parametres of multiphase currents and the main working paremetres of means of hydrodynamic parametres stabilization computation, based on new scientific postulates, obtained in the result of both theoretical and experimental studies.

The technical value of the Project lies in developing new equipment and means of hydrodynamic processes stabilization in pressure pipelines during multiphase hydroaeromixture transportation, effectively providing the implementation of their functional designation.

The Project fully corresponds to the ISTC aims, as a group of scientists, formerly connected with developing weapons will take part in its implementation. The Project will enable them to shift the orientation of their skills and abilities to peacetime activity. The Project will support the earlier research carried out for peaceful purposes, and encourage the integration of the research workers and engineers of the Institute of Mining Mechanics of the Academy of Sciences of Georgia into international community.

The Project Collaborator is a well-known scientist in this field, representing a major scientific center in the U.S.A., capable of coordinating and controlling the research work of the Project, and joining this work in case of emergency.


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The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.

 

ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.

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