Entwicklung von Mehrphasenmesstechnik
Für die räumlich und zeitlich hochauflösende Prozess- und Strömungsdiagnostik entwickeln wir eigene Sensoren und Messverfahren. Der Fokus liegt dabei auf bildgebenden Messverfahren.
Such probes allow the investigation of multiphase flows with liquid and gaseous phase components with a high temporal resolution.
Wire-mesh sensors belong to flow imaging techniques and allow the investigation of multiphase flows with high spatial and temporal resolution. The wire-mesh sensor principle is based on a matrix-like arrangement of the measuring points.
Ultrafast electron beam X-ray computed tomography (ROFEX)
The high-performance ROFEX (ROssendorf Fast Electron beam X-ray tomography)imaging technique has been developed at Helmholtz-Zentrum Dresden-Rossendorf for the noninvasive investigation of dynamic processes.
Gamma-ray computed tomography
Gamma ray tomography is well suited to determination of phase fraction distributions in heavy and dense industrial devices and machines. For that the HZDR developed and operate a high resolution and transportable gamma-ray computed tomography scanner.
X-ray- and micro-focus X-ray-computed tomography
In the frame of research in thermal fluid dynamics we use X-ray radiography and tomography techniques for the measurement of gas and liquid hold-up in chemical vessels and experimental flow loops.
Optical tomography is currently being tested for imaging of gas-water flows at low gas fractions. With this technique it is possible to generate cross-sectional images of the temporal and time-integral gas distribution within a plane of a vessel or pipe.
Autonomous Sensor Concepts
The acquisition of spatially distributed parameters in large vessels is problematic, as sensor mounting or cable connections are not feasible or desired. The concept of instrumented flow followers helps to fetch spatially distributed process parameters in chemically and mechanically harsh environments of agitated industrial vessels.
The process microscope was developed for the analysis of gas bubbles and particles in process fluids. It works according to the optical shadowgraphy principle and consists of a camera unit and an illumination unit. Very short exposure times offer sharp images even at high flow rates.