CAVITATION TUNNEL FACILITY DEDICATED TO THE NATION
Dr VK Aatre, Scientific Adviser to Raksha Mantri and Secretary, DRDO, inaugurated the Cavitation Tunnel-a major Hydrodynamic Test Facility established at the Naval Science & Technological Laboratory (NSTL), Visakhapatnam, and dedicated the same to the nation on 7 November 2001. The facility created at a cost of Rs 24.17 crores, is second of its own kind being created as a part of full range hydrodynamic test facilities at NSTL.
has established various hydrodynamic test facilities, viz. high speed towing tank with
VPMM; cavitation tunnel and LAHPMM (under installation) for carrying out model tests for
surface ships and submerged bodies under controlled conditions.
The facility at NSTL consists of vertical plane, closed re-circulating, variable speed, variable pressure type with automatic control system (ACS), data acquisition and analysis system (DAAS) for operation, control and conduction of tests. It also has a stand-alone acoustic measurement system (AMS) for acoustic data acquisition, analysis and extrapolation. Other features include 5.2 m long acoustic trough, 6.56: 1 contraction nozzle, aeration and de-aeration system, fine filtering system, stainless steel shell, stroboscopy and videography systems and models/dynamometers mounted on large removable test section cover. The tunnel is designed for low turbulence< 0.5 per cent) in the test section and background noise level less than 90 dB at 6m/sec flow over 1-100 kHz band.
Cavitation Tunnel Facility: Specifications
Thyristor controlled 700 KW DC electric motor driving 2.1 m dia, fixed pitch, 7 bladed axial flow impeller with 9 stator blades.
Utility or Cavitation Tunnel Facility: