VDI 4675 Part 2:2019 Edition

$37.70

Balance-based averaging of inhomogeneous flow fields – Applications

Published By	Publication Date	Number of Pages
DIN	2019-04	44

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Categories: 17.120.10 - Flow in closed conduits, 27.010 - Energy and heat transfer engineering in general, DIN

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Description

This standard demonstrates the application procedure of balance-based averaging of three-dimensional and instationary flow fields. It shows the conversion of statistical temporal mean values of turbulent flows into balance-based ones and the selection of averaged values in order to clarify which values experts should take into account for the solution for a special problem. Three examples with calculated or measured flow fields are described and evaluated: the exhaust casing of a low-pressure steam turbine, the stage of a radial-flow compressor and an axial-flow turbine. It is shown how mechanical and thermodynamic properties can be described properly for a one-dimensional flow. Comparisons are made with conventional representations and the significance of inhomogeneity characteristics is demonstrated. A demonstration software program for plane averaging is described and provided.

Additional information

Published Code	DIN
Published By	Deutsches Institut für Normung
Publication Date	2019-04
Pages Count	44
Language	Germany
Descriptors	Applications, Example for application, Field, Financial statements, Flow, Fluid mechanics, Inhomogenous, Mathematical calculations, Mean, Taking the mean, Thermodynamics, Implementation, Use
File Size	16.0 MB
ICS Codes	17.120.10 - Flow in closed conduits 27.010 - Energy and heat transfer engineering in general

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VDI 4675 Part 2:2019 Edition

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