About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Posokhin V.N. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Ziganshin A.M. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Mudarisov D.I. – student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 |
| Title of the article | The influence zones of disturbing elements in pipeline systems |
| Abstract. | The article deals with determining the extent of the influence zones of disturbing elements of piping systems. The study is carried out numerically for disturbing elements in the form of a sharp 90° bend, the sudden expansion and the sudden contraction. Definition of influence zones held by a specially imposed flow deformation parameters – index characterizing uneven velocity profile, which is typical for asymmetric disturbing elements, as well as indicators characterizing the change in the relative dynamic pressure along the channel. The latter can be used for both asymmetric and symmetric disturbances in the piping systems. In both cases, you need to ask some small value of chosen flow deformation indicator. In this paper was determining the specific values of the deformation flow parameters, allowing to define the boundaries of influence zones of disturbing elements. By results of numerical solution and following evaluating of problems, comparing of the extent of influence zones, obtained by means of the two above methods are carried out. It is shown that the use of non-uniformity of the velocity profile index leads to a somewhat rough estimate lengths of influence zones. Next are the lengths of influence zones for the investigated configurations of disturbing elements found by the parameter of the relative dynamic pressure changes. Besides the minor loss coefficients are determined, which are in good agreement with the experimental data, what also indicates the adequacy of the numerical simulation. |
| Keywords. | Computational methods, disturbing elements, zones of influence. |
| For citations: | Posokhin V.N., Ziganshin A.M., Mudarisov D.I. The influence zones of disturbing elements in pipeline systems // Izvestiya KGASU. 2014. №2(28) P.121-126. |
