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Boundary Layer Wind Tunnel Facility

Boundary layer wind tunnel (BLWT) investigations are internationally accepted laboratory practice for investigating the dynamic wind loads and their effects on buildings/structures. In recent years, there is an increase in demand for design and construction of high-rise buildings, memorial towers, bridges, etc. with innovative and complex architectural shapes. Similarly, there is a boom in expansion/setting-up of new, higher capacity thermal and nuclear power plants across the country. This calls for design and construction of tall chimneys, cooling towers etc., which are highly susceptible to dynamic wind action. Codal recommendations are inadequate to address some of these problems, particularly wind induced interference effects. BLWT testing is considered as a reliable tool for studying aerodynamic and aeroelastic behaviour of such structures. The results of the wind tunnel test results are used as important inputs for design of these structures for ensuring their structural safety and serviceability.

Wind Engineering Laboratory ( WEL )
Wind Engineering Laboratory ( WEL )
Wind Engineering Laboratory ( WEL )

Features

  • Open Circuit, Blower Type
  • Test Section of 1.8 m (H) x 2.5 m (W) x 18.0 m (L)
  • Overall length of tunnel: 52 m
  • Wind speed range: 0.5 m/s to 55.0 m/s
  • Reynolds number range (per m): 3 x 104 to 3.6 x 106
  • Typically around 10% of turbulence intensity at a height of about 1.2 m under simulated open terrain conditions
  • Adjustable ceiling of test section
  • Trip boards and roughness blocks – vortex generators

Instrumentation and Equipment

  • Hot Wire Anemometry-DANTEC
  • High Speed Multi Channel pressure measurement system with DTC (384 Channels, 12 Scanners of 0.36 psi)-Measurement Specialties
  • High Speed Multi Channel pressure measurement system (160 Channels, two 64 Channel Scanners of 0.36 psi, 32 channel Scanner of 1.0 psi)-Scanivalve Corporation
  • Miniature Accelerometers – ENDEVCO, B&K
  • 3D-Stereo Particle Image Velocimetry (PIV)-Lavision
  • Force Balance – ATI Automation
  • Strain gauges –TML
  • Data acquisition system for strain gauge and voltage data – HBM

Full- Scale Field Measurement Facility

Wind Engineering Laboratory ( WEL )

Instrumentation and Equipment

  • Remote Wind Monitoring System
  • Mobile Laboratory
  • Propeller and Sonic Anemometers –RM YOUNG, GILL
  • Tri-axial Accelerometer –CROSS BOW

Computational Fluid Dynamics Facility

With the advent of faster computing power with large memory, application of CFD in wind engineering research is becoming feasible towards numerical simulation of external flows. It has been emphasised, internationally, to adopt CFD simulations in a complementary nature to the boundary layer wind tunnel simulations to provide aerodynamic parameters required for various engineering/industrial problems.

Components

  • ANSYS-Fluent Software (version 6.3) with features like user-defined functions, which enable to carry out R&D investigations by incorporating modifications/improvements to existing turbulence models and by generating customised incident wind profiles to match with that of the experiments.
  • Multi-processor servers for parallel computing purpose.