Study And Analysis Of Subsonic Wind Tunnel-ppt1234

Study and Analysis of Subsonic Wind Tunnel PresentatorAjay 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.

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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. 

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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", PC10.0-1/4 (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 tipinduced trailing vortices are shown below

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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!