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Overlapping of Pipe-Lines


Hydrodynamics of Liquid Flows During Fast Overlapping of Pipelines

Tech Area / Field

  • ENV-MIN/Monitoring and Instrumentation/Environment

8 Project completed

Registration date

Completion date

Senior Project Manager
Isakov S V

Leading Institute
VNIITF, Russia, Chelyabinsk reg., Snezhinsk

Supporting institutes

  • Chelyabinsk State University, Russia, Chelyabinsk reg., Chelyabinsk


  • Lawrence Livermore National Laboratory, USA, CA, Livermore

Project summary

The most important technical task concerned with ensuring the safe usage of pipe-lines is the development and the practical usage of fast-acting locking equipment making possible the independent overlapping of the pipe-line in case of emergency situation occurrence at the adjoining section of the main pipe-line. At present there are no valves with the speed of their response in liquid medium equal to 1 s.

The basic goal of the Project is to create the scientific base with respect to hydrodynamic processes as applied to the development of devices for the fast overlapping of flows in pipelines.

In the Project the consideration is given to the following directions:

- resistance of medium to the motion of the overlapping element;
- hydrodynamic impact.

The following tasks are solved:

- creation of experimental and theoretical base for investigating hydrodynamic processes proceeding during the fast emergency overlapping of the flow;
- calculation-analytical and experimental determination of forces exerting resistance to the motion of the working elements of the overlapping device on the side of liquid;
- calculation-analytical and experimental study into conditions for arising the hydrodynamic impact and its consequences;
- obtaining of initial data on the dynamic force action on the overlapping device and the elements of the pipe-line for the subsequent usage in the design of the valve and the substantiation of the technical decisions.

The mathematical and physical modeling is the basis of the investigation methods.

For the mathematical modeling codes existing in VNIITF are developed and adapted. The physical modeling will be performed at hydrodynamic installations with taking into consideration the criteria of the flows similarity.

The investigation results will form the hydrodynamic part of the engineering theory of fast-acting valves.

The Project is based on the RFNC-VNIITF experience in the development of devices for large-scale tests and corresponds to 1STС goals in ensuring the alternative employment of specialists.


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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