Original Measuring and Calibration Equipment for Investigation of Turbulent Swirling Flow in Circular Pipe

Abstract

Modeling of turbulent swirling FLow is a contemporary problem in FLuid mechanics. In order to make an appropriate modeling it is necessary to have reliable experimental data on instantaneous velocity field. This article presents original equipment for experimental investigation of swirling FLow in straight circular pipe. A major role in that equipment plays originally developed and unique hot-wire probe. This probe has high-spatial and temporal resolution, and it can also be used for measuring in a viscous sublayer. Together with detailed description of the probe, the original wind tunnel for hot-wire probes calibration is also presented in this article. The wind tunnel produces the jet with uniform velocity distribution and a very low level of turbulence.