• Effects of sediment erosion in guide vanes of Francis turbines 

      Thapa, Biraj Singh (Doctoral theses at NTNU;2016:260, Doctoral thesis, 2016)
      Erosive wear of turbine components has been a major operational challenge for the runoff-river hydropower plants across the basins of Himalaya in Asia. The hard mineral particles, which are carried by rivers reach the ...
    • Sand Erosion in Hydraulic Machinery 

      Thapa, Bhola (Doktoravhandlinger ved NTNU, 1503-8181; 2004:105, Doctoral thesis, 2004)
      The topic of this thesis is damage of hydraulic machinery due to sand erosion. This is a very broad topic in which all the aspects of design of hydraulic machinery namely material selection; mechanics of material and ...
    • Velocity and pressure measurements in guide vane clearance gap of a low specific speed Francis turbine 

      Thapa, Biraj Singh; Dahlhaug, Ole Gunnar; Thapa, Bhola (Journal article; Peer reviewed, 2016)
      In Francis turbine, a small clearance gap between the guide vanes and the cover plates is usually required to pivot guide vanes as a part of governing system. Deflection of cover plates and erosion of mating surfaces causes ...