Bulgarian Ship Hydrodynamics centre
Facilities
Facilities
Cavitation Tunnel
Type K 15 B , Kempf & Remmers, Germany (vertical set-up), closed circulation, closed working section.
Dimensions:
Length (between vertical axes) - 12m
Height (between horizontal axes) - 2.6m
Other parameters:
Min. cavitation number - 0.2
Absolute pressure, max. - 200kPa
Absolute pressure, min. - 6kPa

Measuring sections:

  1. Measuring section No. 1 (square, rounded corners)
  2. Measuring section No. 2 (rectangular)

Instrumentation:

Propeller dynamometer No. 1
Type J25, Kempf & Remmers, Germany, intended for tests of propeller models.
Specifications:
Thrust ± 3000 N
Torque ± 150 Nm
Rate of rotation up to 60 rps
Accuracy ± 0,15%
Propeller dynamometer No. 2
Type H41, Kempf & Remmers, Germany, intended for tests of propeller models (including ducted propellers) in axial and oblique flow. When operating jointly with dynamometer J25, coaxial (counter-rotating or tandem) propellers can be tested.
Specifications:
Thrust ± 2000 N
Torque ± 100 Nm
Rate of rotation up to 50 rps
Propeller shaft inclination towards the flow ± 12°
Accuracy ± 0,15%
Propeller dynamometer No. 3
Type R46, Kempf & Remmers, Germany, watertight, intended for tests of propeller models behind ship models in Measuring section No.2
Specifications:
Thrust ± 400 N
Torque ± 15 Nm
Rate of rotation up to 50 rps
Propeller shaft inclination towards the flow ± 18°
Accuracy ± 0,15%
Six-component balance
Type H36, Kempf & Remmers, Germany intended for tests of ducted propellers, rudders, hydrofoils and various axisymmetric bodies.
Specifications:
Measuring range along axes       
   
forces:  Fx = ± 2000 N;   Fy = ± 500 N;    
Fz = ± 2000 N;
moments: Mx = ± 100 Nm; My = ± 800 Nm;
Mz = ± 200 Nm;
Accuracy ± 0,15%
 
  • Wake rake - fourteen Pitot-static tubes for measurement of axial flow distribution
  • 3-D Wake rake - six 5-hole Pitot tubes for measurement of 3-D flow distribution
  • Pressure transducers
  • Measuring amplifiers and filters
  • Electronic counters
  • Digital voltmeters
  • Digital frequency meters
  • High precision digital manometers
  • Laser Doppler anemometer
  • Strobe and video system

Measuring section No. 1 (square, rounded corners)


Dimensions: Other parameters:
Length - 2.6m
Width - 0.6m
Depth - 0.6m
Max. flow velocity - 14m/s
Max. propeller diameter - 0.3m

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Measuring section No. 2 (rectangular)

Dimensions: Other parameters:
Length - 6m
Width - 1.4m
Depth - 0.7m
Max. flow velocity - 4.5m/s
Max. ship model length - 5m


 

 

 

 

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Last updated 29 August 2014   

   
Bulgarian Academy of Sciences