Turbomachine – Results

Additive manufactured ducted propeller (A6061, Tip gap: 2 mm)

Objectives:

  • Visualize cavitation erosion on an AM propeller and the evolution of surface pitting over time.

Approach:

  • The propeller was continually operated in the established design conditions, viz. Advance ratios  J= 0.803, 0.85, 0.9 at cavitation number σ= 10.
  • Imaging was done at 15 kHz to detect incipient and observe developed cavitation in the tip region.
  • Phantom v2640 high-speed camera was used for the same (1024 x 976 pixels).

Results:

DUCTED PROPELLER (Acrylic, Tip gap: 2 mm)

Previous Turbomachine results

Effects of Axial Casing Grooves (ACGs) on the performance of axial compressor.

Effects of Axial Casing Grooves (ACGs) on the efficiency of axial compressor.

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FLOW VISUALIZATION USING CAVITATION

 

Formation of Tip Leakage Vortex (TLV) and Backflow Vortex (BFV) in axial compressor.

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STEREOSCOPIC PARTICLE IMAGE VELOCIMETRY

 

 

Sketch of a typical SPIV setup.

 

Three-dimensional structure of the TLV