Determination of exemplary dataset of spatial fluid velocity profiles and components of the turbulent Reynolds stress tensor in air and water downstream to special pipe configuration

Project Description

An exemplary dataset of spatial fluid velocity profiles and components of the turbulent Reynolds stress tensor shall be gathered downstream to special pipe configuration (PTB perturbation plate) by means of LDV measurements. The fluids in the tests will be water and air (atmospheric). A data evaluation will be applied taking aim at statements about basic similarities as well as basic differences in the flow field development between air and water and to provide a feasibility study of possibilities to underfeed CFD applications for wide range extrapolation in Reynolds number and fluid characteristics.

Progress Report 2026-04-15

The focus of the project changed from “Determination of exemplary dataset of spatial fluid velocity profiles” to “Disturbance plates for flow meter testing”.

General aim:

• Definition of disturbance plates for replacement of main
  perturbation test configurations as defined in OIML R-137, ISO 17089, EN-12261 and others
• Demonstration of the equivalence between real configurations
  and disturbance plates with respect to velocity field downstream
   

Arrangement with WG revising ISO 17089:

• Just demonstrate comparability of Double bend out of plane left + right turning
  and Single bend with new perturbation plate based on USM path indication
• Flow measurement with real configurations and perturbation plates with 8-Path USM
• Introduction of new informative annex in the ISO 17089
   

BEV (Austria) does not longer participate in this project.
New project partners are:  ISO/TC 30/SC 5/WG 1 (DIN Standards Committee Technical Fundamentals,Germany) and  Endress+Hauser Sick (Germany)