Study and Analysis of Subsonic Wind Tunnel-Ppt1234

Study and Analysis of Subsonic Wind Tunnel

Presentator- Ajay Patel (0609140003)

Amarendra Uttam (0609140007)Aditi Saini (0609140002)

Ajeet Jaiswal (0609140005)

Use of Wind Tunnel-Model Testing

• •What is the purpose of the wind tunnel?• A wind tunnel simulates a high-speed stream of air to

flow past a model of the• object being tested.• Testing of aircraft

Contents

• •Introduction• •Development plan• •Design of an educational wind tunnel and the cardboard

prototype• •Construction of full-scale model• –Contraction zone• –Test section• –Diffuser and the installation of a driving fan• •Flow visualization• •Conclusion and future work• •Acknowledgement

Introduction• •What is the wind tunnel?• A chamber through which air is forced at controlled

velocities in order to study the effects of• aerodynamic flow around airfoils or scale models.

Description of Parts

• The parts of a wind tunnel are• •a settling chamber to straighten the flow and control

turbulence intensity.• •a contraction zone to takes a large volume of low-velocity

air and reduces it to a small volume of high-velocity air without creating turbulence

• •a test section where the test article and sensors are installed

• •a diffuser to slow down the speed of airflow and a drive section to provide the force and pull air through the wind tunnel

Development Plan

•Search existing educational wind tunnels in the market and compare their designs, capabilities and costs.

•Design and construct a small cardboard prototype for finding potential manufacturing and assembly issues.

•Search for available fan capacities and scale up the size of cardboard model accordingly.

•Determine dimensions of each part of the wind tunnel and finish CAD drawing

•Construct and assemble the wind tunnel with metal sheets, plexiglass and fiber glass structure enhancement, honeycombs and a fan.

•Purchase or build small-scale airplane

Design of a Wind Tunnel and the Cardboard Prototype

•Determine an fan, modified from Aerorocket wind tunnel.•The basic desigopen-looped suction wind tunnel powered by a n was done by Donald D.Baalsof NASA. •Test section dimension is 7”(height) x 12”(length) x10”(width) for the cardboard model

Cardboard Prototype

Contraction Zone

• •Polycarbonate honeycomb core sheet, color:clear, 1/4"cell x 1.5"thick, 22" x 31", PC-10.0-1/4 (PC-density-cell size)

• •Enhance the structure with multi-layers of fiberglass cloth and resins.

Test Section

• •The test section is made of plexi-glass with a wooden platform to mount the test model.

• •The model mounting device is built by parts from a robotic lamp and capable of rotating in (φ,θ,ω)

Diffuser and the Installation of a Driving Fan

Final Assembly

Flow Visualization• Flow Visualization by Condensation Cloud Condensation cloudVortices•The

clouds are formed because the air has cooled to the point that the ambient water vapor condenses due to a lower pressure around the aircraft body surfaces. It occurs when weather and humidity permit. No man-made instrumentation is required.•Examples of lift-induced condensation and tip-induced trailing vortices are shown below

Future Scope of Wind Tunnel

• Wind tunnel helps shape future aircraft

• Purdue University engineers have developed a wind tunnel that is the only one of its kind in the world capable of running quietly at "hypersonic" speeds, helping researchers to design advanced aircraft and missiles.

Thank You!