Transcript SWIFT
Supersonic Wind and Imaging Flow Tunnel SWIFT Interim Assignment Kendria Alt Joshua Clement Shannon Fortenberry Katelynn Greer David McNeill Charles Murphy Matthew Osborn David Springer Contents Overview of Objectives Overview of Requirements Unchanged Requirements Updated Requirements Requests for Action System Design Prototyping Results Visualization Prototype Tunnel Prototype Overview of Objectives Supersonic Wind Tunnel and Flow Visualization System Operable by Undergraduate Engineering Students Mach 1.5 – 3 in 0.5 Increments Accuracy of Mach ±0.05 Customer: Dr. Brian Argrow Unchanged Requirements Speeds Mach 1.5 - 3.0 ±0.05 Steady State Run Time 5 sec Lab Session 1 run in 30 min Operable in temperatures of 20o - 80o F Visualization Used for Mach verification Must see aerodynamic phenomena at front and back of test object Test Section Area ≥ 1” x 0.25” Test 3 objects at all speeds Updated Requirements Old Requirement New Requirement Reason Lab Session 12 Runs without changing 6 Runs without changing tanks tanks Too many tanks to manifold Volume < 30” x 42” x 36” Weight < 100 lbs/cart top 2 cart tops available Accommodation of settling tank and optical Bench Modified ITLL lab aart Movable by Trudy Schwartz Operation Computer controlled start and stop Manual valve start and stop Cost of electric and pneumatic valves Requests for Action Request: Incorporate a safety regime that includes hiring a licensed, insured, PE to assist with settling tank design. Requestor: Matt Rhode Resolution: Hired Charles Torres P.E. and Jon Simmons P.E. of Mayo Industries Inc.. System Design Each bullet will be discussed individually in CDR Tunnel Sub-System To Settling Tank Elements Linkages Valve Regulator Manifold Nozzle Design Light Source Light Path Elements Condensor Lense Mirror Knife Edge Capture Device Computer Interface Settling Tank From Settling Tank Elements Linkages Valve Nozzle / Piping Interface Nozzle and Test Section Visualization Sub-System Structural Elements Mounts Encasing System Integration Cart Modifications Reinforcement Casters Sound Suppression System Design Sensors Regulator Manifold Manual Valve Light Source Settling Tank Computer Capture Device Manual Valve Nozzle Knife Edge / Filter Lens Test Section Lens Iris 4 Commercial Tanks *To be replaced with a solid model Settling Tank Optimization Contours: Number of Tanks for 12 runs at Mach 2 •Assumptions •Adiabatic, Polytropic, Expansion P1V1 P2V2 •Commercial Tank Specs •8.5” diameter •50” height •2000 psi •Conclusions •Settling tank: 4 ft3 at 450 psi for Mach 2 •8 tanks required for 12 runs at Mach 2 •Pressure increases to 1000 psi (still 4 ft3) for Mach 3 Settling Tank Optimization Considered dividing 4 ft3, equally, among as many as 7 smaller volume tanks Assumptions Vol: 4ft3 Hemispherical end caps ASME Code thickness Carbon Steel of nominal properties Conclusions Small weight savings from increasing number of tanks Increased complexity negates savings 1 Tank Inside Diameter: 19 in Length: 34 in Electrical Interconnects Minimal, and may be assimilated in other slides for CDR Computer Program Block Diagram Light Source Power Capture Device Folder Name and Path Start Power Image Name (i) Wait Time between images (t ms) Steady State Signal WebCam to Take Image (i) Computer Interface (i) Save Image (i) Settling Tank Sensors Computer Capture Device t ms Wait Stop Visualization Prototype Visualization Prototype Setup Setup in Electrical Engineering optical lab Parts Light Source Iris 2 Achromatic Lenses 45 degree mirror Razor blade knife edge and color filter 3 camera selections Visuals Wedge Coupon Candle Cold Spray Visualization Prototype Results Sony vx2000 Sony Cybershot 720 x 486 2738 x 1825 Continuous Zoom, Focus, Iris Stepped Focus Continuous Zoom HP WebCam 480 x 640 Manual Focus Visualization Prototype Conclusions Lens array (zoom, focus iris) is needed to properly focus and utilize the full frame. 640 x 480 resolution is the minimum to sufficiently measure the angle. Longer focal length for the secondary is desired. L shape (with mirror) to compensate for longer focal length. Very dim light source needed to avoid overpowering the density gradient. Color filter needed to be very dark. Knife edge work best when cutting of 2/3 of focal point. High knife edge accuracies needed. Tunnel Prototype Manufacture a sealed test section and the adapter to the system’s NPT pipe. Learn the intricacies of our manufacturing method, including required man hours. Ensure our design is properly thought out and easily used by undergraduate students. Hydrostatically pressure test. To verify safe design up to a SF of 1.5. Will be performed after CDR. Tunnel Prototype The left piece is an adapter that converts 1” NPT pipe to the 3” diameter necessary for the test section. The right piece is the test section which is created using plexiglass and steel. The end of the test section is sealed for hydrostatic testing of our design before the throat (where the pressure is the greatest). The two pieces are held together with 4-1/2” bolts using the two square flanges.