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Measurement of flow parameters in a Taylor-Couette configuration using UDV measurement technology

Meironke Heiko, Klembt Daniel

Journal of Mechanical and Energy Engineering

2019

Vol. 3, No 3

259--266

In the context of the investigations of multiphase flows, e.g. in cooperation with the local brewery, the convective transport phenomena during the fermentation are investigated. Due to the strong turbidity of the medium, the measurement of velocity profiles is complicated. The difficulties of an investigation with a biological fermentation fluid are the many complex interactions between the different three phases (solid, gas, liquid). Furthermore, natural convection processes are superimposed by rising gas bubbles and the high turbidity of the fluid only allow an acoustic velocity measurement. This leads to high requirements for the measurement technology and the following evaluation. In previous investigation, ultrasonic transducers are used for the non-contact determination of velocity fields in fluids. The results of these past projects show that the measurement signals of the ultrasonic transducers used can be influenced by many factors. In order to verify the results of the transducers and to investigate the existing uncertainties, a flow configuration with a relatively stable reproducible flow pattern is required. In this study, a calibration system for ultrasonic transducers is developed, manufactured and validated by means of optical measurement technology such as the LDA. The experimental setup in this study produces a constantly reproducible Taylor Couette fluid flow. Geoffrey I. Taylor observed in 1923 that at a certain Reynolds number regular ring vortices are superimposed on the base flow. Along the axis, these vortices occur at the same distance, but with an alternating sense of rotation. Finally, a measurement using Ultrasonic Doppler Velocimetry in a model fluid will be compared with an optical measurement technique.

Zastosowanie pompy wirowej do wspomagania pracy serca

Szwast M., Świerczyński M., Piątkiewicz W.

Inżynieria i Aparatura Chemiczna

2006

Nr 5s

133-134

Using a rotary centrifugal pump for the heart assist is a new direction of mechanical heart assist devices expansion. This type of solution is introduced for clinical applications. The authors took measures to develop own construction of the artificial heart as a centrifugal pump. Technical problems that should be solved in designing stage are discussed.

Analysis of the combustion effects on the turbulence structure in premixed jet flames

Jarża A., Grodzki G.

Turbulence : international journal

2002

Vol. 8-9

159-173

The purpose of the paper is to clarify the mechanisms of the turbulence/ /combustion interaction by comparing a jet premixed methane-air flame and cold jet cases. The research program carried cut with the use of Laser Doppler Anemometry is focused on the determination of both the instantaneous and mean flame structure in terms of velocity and temperature. Moreover, the effect of flame stoichiometry is also considered with respect to spatial distribution of the thermal and aerodynamic parameters of the round flame.