Contact

Dr. André Bieberle
Experimental Thermal Fluid Dynamics
a.bieberleAthzdr.de
Phone: +49 351 260 - 2913
Fax: 12913, 2383

Prof. Dr. Uwe Hampel
Head
u.hampel@hzdr.de
Phone: +49 351 260 - 2772
Fax: 12772, 2383

Gamma-ray computed tomography

Motivation

Gamma ray tomography is well suited to determination of phase fraction distributions (gas, liquid, solid) in heavy and dense industrial devices and machines, such as axial compressors, pumps, hydro-dynamic couplings, thermal hydraulic facilities, pipelines, reactors, distillation columns and other components of larger process plants. For that we developed and operate a high resolution and transportable gamma-ray computed tomography scanner. It contains a collimated radiation source (nuclide: 137Cs, activity: 180 GBq, effective focal spot: 6 mm in diameter) and a radiation detector arc comprising 320 scintillation converts with a pitch of 2 mm. The radiation detector is thermally stabilized to achieve highest quantitative image quality in thermally varying environments. Projections can be obtained every second or with higher sampling frequency of up to 25 kHz. The latter is needed for angle-synchronized computed tomography of rapidly rotating structures, such as in pumps or stirred vessels.



Cooperation

  • TU Dresden
  • TU Eindhoven
  • TU Hamburg
  • TU Dortmund
  • Karlsruher Institute for Technology
  • Mahle Behr GmbH
  • ASB
  • AREVA NP GmbH
  • EVONIK Industries AG
  • International Atomic Energy Agency, IAEA

References

  • A. Bieberle et al.
    Design of a modular signal processing board (MSPB) for gamma-ray imaging applications
    Nuclear Instruments and Methods in Physics Research A, 663 (1), pp. 14 - 21, 2012. [doi:10.1016/j.nima.2011.09.060]
  • A. Bieberle et al.
    Temperature control design for a high resolution gamma-ray tomography detector
    Review of Scientific Instruments Vol. 81, 014702, 2010. [doi:10.1063/1.3280184]
  • U. Hampel et al.
    High resolution gamma ray tomography scanner for flow measurement and non-destructive testing applications
    Review of Scientific Instruments Vol. 78, 103704, 2007. [doi:10.1063/1.2795648]
  • A. Bieberle et al.
    Data acquisition system for angle synchronized gamma-ray tomography of rapidly rotating objects
    Measurement Science and Technology, Vol. 18, pp. 3384-3390, 2007. [doi:10.1088/0957-0233/18/11/018]

Applications

Foto: Centrifugal pumps - reference picture ©Copyright: Dr. André Bieberle

Centrifugal pumps

Within the BMBF funded project SAVE the behaviour of an industrial pump operating in two-phase mode has been extensively analysed concerning different gas volume rates and gas patterns.
More
Foto: Bubble column reactors - reference picture ©Copyright: Dr. André Bieberle

Bubble column reactors

Measurements on bubble columns in our laboratories as well as at our industry partner Evonik Industries deli­vered new knowledge concerning axial and radial gas holdup distributions and flow structures for different industrial inlet geometries.
More
Foto: Hydrodynamic couplings - reference picture ©Copyright: Dr. André Bieberle

Hydrodynamic couplings

In cooperation with the industrial partner Mahle Behr GmbH the liquid distribution within a rapidly rotating VISCO coupling, used as impeller gear in car air conditioning systems, could be successfully determined for various momentum transfers.
More
Foto: Innovative chemical reactors - reference picture ©Copyright: Dr. André Bieberle

Innovative chemical reactors

In cooperation with TU Eindhoven two-phase flow in novel reactor designs with rotating parts (solid foam and disc) have been analysed for different operating stages and installation positions.
More

Contact

Dr. André Bieberle
Experimental Thermal Fluid Dynamics
a.bieberleAthzdr.de
Phone: +49 351 260 - 2913
Fax: 12913, 2383

Prof. Dr. Uwe Hampel
Head
u.hampel@hzdr.de
Phone: +49 351 260 - 2772
Fax: 12772, 2383