Contact

Dr. Gunter Gerbeth
Director Institute of Fluid Dynamics
g.gerbethAthzdr.de
Phone: +49 351 260 - 3480, 3484
Fax: +49 351 260 - 3440

Dr. Gerd Mutschke
Institute of Fluid Dynamics
g.mutschkeAthzdr.de
Phone: +49 351 260 - 2480
Fax: +49 351 260 - 12480

Petra Vetter
Secretary Institute of Fluid Dynamics
p.vetterAthzdr.de
Phone: +49 351 260 - 3480
Fax: 13480, 3440

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Experiments

Air/water experiments at the test section "Variable Gas Injection system"

The test section circuit and the compressed air system of the test facility are used for air/water experiments with the "Variable Gas Injection system". This system is a specific test section that consists of a special kind of vertical tube DN200, which is equipped with gas injection units at six different heights, and a riser for the gaseous phase. The riser is used for the supply of air to the six injection units during these experiments.

The test section pump supports water from the steam drum into the lower part of the test section. The required mass flow is adjusted with three parallel control valves and by means of the frequency converter of the test section pump. The injection of the gaseous phase is carried out over the riser line into the injection chambers, which can be blocked separately. The necessary volume flow is made available by six parallel compressed air controllers.The measurements are done with low temperature wire-mesh sensors, which are installed at the upper end of the test section.

A full description of the individual elements of the test section circuit, of the "Variable Gas Injection", as well as of the compressed air system can be opened by clicking the respective components. The navigation point "facility" contains explanations about the whole test facility.

description of the steam drum description of the test section pump Description of the Variable Gas Injection Description of the compressed air system

Scheme of the test track circuit with the variable gas feeding

The following experimental matrixes illustrate seven measurement series. In this case, the dark fields show the points measured in each case. The axes indicate the superficial velocity of the fluid and gaseous phases. Below the experimental matrixes, the most important test conditions are illustrated with which the experiments were conducted.

 

Variable Gas Injection system DN200; series L01

Experimental matrix Variables Gas Injection run L01

Boundary conditions:

  • Air injection either through 72 orifices of 1 mm diameter or 32 orifices of 4 mm with the (Variable Gas Injection system)
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the first sensor: variable for the individual experimental points between 7,800 and 220 mm
  • Not all experimental points were measured in all height positions
  • Pressure in the test section: approx. 0.1 MPa
  • Temperature in the test section: 20 - 31 °C

Variable Gas Injection system DN200; series L02

Experimental matrix Variable Gas Injection system run L02

Boundary conditions:

  • Air injection through 72 orifices of 1 mm diameter or 32 orifices of 4 mm with the (Variable Gas Injection system)
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the sensor: variable for the individual experimental points between 7,800 and 220 mm
  • Not all experimental points were measured in all height positions
  • Pressure in the test section: approx. 0.1 MPa
  • Temperature in the test section: 28 - 37 °C

Variable Gas Injection system DN200; series L06

Experimental matrix Variable Gas Injection system run L06

Boundary conditions:

  • Air injection through 72 orifices of 1 mm diameter or 32 orifices of 4 mm with the (Variable Gas Injection system)
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the first sensor: variable for the individual experimental points between 7,800 and 220 mm
  • Pressure in the test section: approx. 0.1 MPa
  • Temperature in the test section: 28 - 37 °C

Variable Gas Injection system DN200; series L07

Experimental matrix Variable Gas Injection system run L07

Boundary conditions:

  • Central air injection with the gas injection head type I through 152 orifices with 0.8 mm diameter
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the first sensor: 7,606 mm
  • Pressure in the test section: approx. 0.1 MPa
  • Temperature in the test section: 25 - 26 °C

Variable Gas Injection system DN200; series L08

Experimental matrix VGE L08

Boundary conditions:

  • Air injection through 72 orifices of 1 mm diameter or 32 orifices of 4 mm with the (Variable Gas Injection system)
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the first sensor: 221 bzw. 278 mm
  • Pressure in the test section: 0.1; 0.12; 0.14; 0.16; 0.18; 0.2 MPa
  • Temperature in the test section: 31 - 42 °C

Variable Gas Injection system DN200; series L10

Experimental matrix VGE L10

Boundary conditions:

  • Central air injection with the gas injection head type I through 152 orifices with 0.8 mm diameter
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the first sensor: 7,606 mm
  • Pressure in the test section: approx. 0.1 MPa
  • Temperature in the test section: 32 - 35 °C

Variable Gas Injection system DN200; series L12

Experimental matrix Variable Gas Injection system run L12

Boundary conditions:

  • Air injection through 72 orifices of 1 mm diameter or 32 orifices of 4 mm with the (Variable Gas Injection system)
  • Measurement with two low temperature wire-mesh sensors (64 x 64 electrodes)
  • Distance between the air injection and the measurement plane of the first sensor: variable for the individual experimental points between 7,800 and 220 mm
  • Constant pressure at the gas injection point: 0.25 MPa
  • Temperature in the test section: 30 °C