Lab Layout & Study of Wind Tunnel1. Layout:

The way in which the parts of something are arranged or laid out. Layout is concerned with the physical location of transforming resources or working equipment; that is deciding where to put the facilities, machines, equipment and staff.

2. Lab Layout: Lab layout means the arrangement of apparatus, facilities, furniture etc. in the available space of lab.

3. Importance of Lab Layout: The importance of a layout would be better appreciated if one understands the influence of an efficient layout on the manufacturing function: it makes it smooth and efficient. Operating efficiencies, such as economies in the cost of handling materials, minimization of production delays and avoidance of bottlenecks “all these depend on a proper layout.

4. List of Apparatus: 1) Hydraulic bench2) Compressible flow bench app3) Metacentric height app4) Flow visualization app5) Bernoulli’s principle demonstrator6) Ocean wave energy power plant7) Fuel Efficient Car8) Educational wind tunnel9) Turbine service unit10) Series and parallel pump test11) Free and forced vertex app12) Francis turbine13) Pelton turbine14) Reaction turbine15) Axial flow impulse turbine

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5. Wind Tunnel: A wind tunnel is a tool used in aerodynamic research to study the effects of air moving past solid objects. A wind tunnel consists of a tubular passage with the object under test mounted in the middle. Air is made to move past the object by a powerful fan system or other means. The test object, often called a wind tunnel model is instrumented with suitable sensors to measure aerodynamic forces, pressure distribution, or other aerodynamic-related characteristics.

6. Open Wind Tunnel (HM 170):

i. Technical Description:

HM 170 is an "Eiffel" type open wind tunnel used to demonstrate and measure the aerodynamic properties of various models. For this purpose, air is drawn in from the environment and accelerated. The air flows around a model, such as an airfoil, in a measuring section. The air is then decelerated in a diffuser and pumped back into the open by a fan.

The carefully designed nozzle contour and a flow straightener ensure a uniform velocity distribution with little turbulence in the closed measuring section. The flow cross-section of the measuring section is square. The built-in axial fan with guide vane and a variable-speed drive is characterized by an energy-efficient operation at high efficiency. Air velocities of up to 28m/s can be reached in this open wind tunnel. The trainer is equipped with an electronic two-component force sensor. Lift and drag are detected and displayed digitally. The air velocity in the measuring section is displayed on the inclined tube manometer.

By using the system for data acquisition HM 170.60, the measured values for pressure, displacement/angle, velocity and force can be transferred to a PC where they can be analyzed with the software.

Extensive accessories allow a variety of experiments, for example lift measurements, pressure distributions, boundary layer analysis or visualization of streamlines.

ii. Learning Objectives / Experiments:

Experiments with accessories

- determine drag and lift coefficients for different models

- Pressure distribution on drag bodies immersed in a flow

- Boundary layer analysis

- Investigation of flutter

- Wake measurement in conjunction with the HM 170.52 Fog Generator

- Visualization of streamlines

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Labelled diagram of Wind Tunnel

iii. Parts of Wind Tunnel: 1. Inlet contour2. Flow straightener3. Nozzle4. Measuring section5. Drag body6. Force sensor7. Display and control unit8. Diffuser9. Switch cabinet10. Inclined tube manometer11. Axial fan

iv. Specification: 1. Experiments from the field of aerodynamics and fluid mechanics with an "Eiffel" type wind tunnel2. Wide range of accessories available3. Transparent, closed measuring section4. Inlet contour, nozzle and diffuser made of GRP5. Variable-speed fan motor for energy-efficient operation6. Flow straightener reduces turbulence7. Electronic two-component force sensor for measuring the flow forces8. Inclined tube manometer for displaying the air velocity9. Digital display of drag and lift10. Display of measured values for pressure, displacement/angle, velocity and force using system for

data acquisition HM 170.60

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v. Technical Data: Measuring section flow cross-section WxH: 292x292mm length: 420mm wind velocity: 3.1……28m/s Axial fan power consumption: 2,55kW Measuring ranges force: 2x -5…….5N pressure: 0...5mbar

vi. Dimensions and Weight: LxWxH: 2870x890x1540mm Weight: approx. 250kg

vii. Required for Operation: 230V, 50/60Hz, 1 phase or 230V, 60Hz/CSA, 3 phases

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