Capstone Team Andre Nylund Chris Grewell Craig Lechtenberg Fadel Al Jutail Matt Melius Mufeed Yacoub Team Advisor Dr. Raul Bayoán Cal Customer Daimler Trucks North America
Tunnel Details 12,000 sq. ft. facility Wind speeds up to 65 30ft long test section 21ft wide 26ft tall
Tunnel Details Pressure sensitive floor for calculating trucks drag coefficient. Smoke wand for flow visualization Rotating floor panel to test various angles of attack
Mission Statement: Improve smoke testing methods Increase the testable area within the wind tunnel Increase stability of the system Deliver smoke to location of interest accurately Electronically controlled system to eliminate human error Provide these requirements while maintaining negligible aerodynamic impact to test region Delivery of final product by June,16th
PDS completion – January 30 th Two axis motion 20’ Horizontal travel 17’ Vertical travel Zero residual impact when not in use Removes itself form wind tunnel completely when not in use Aerodynamic Profile External and Internal Search – February 17 th
Test Subject Pressure Probe Air Flow Typically, traversing systems are used to study the airflow behind a test model (ex. pressure probe is downstream of the test subject)
Traversing systems commonly use linear actuators for precise motion control. Common Applications Flow field and wake survey behind test section Small test sections scale models etc.
Roof Mounted Traversing Probe Traversing Volume 3m x 4m x 6m Positional Accuracy +/- 1mm
Roof Mounted Traversing Probe full size automotive wind tunnel downstream probe Traversing Volume 5m x 12m x 13m Positional Accuracy +/- 1.5mm
Floor mounted track Singly supported Range of travel dictated by rail length
Linear Actuators Pre-fabricated Sealed Unit Reliable
Rail and Linear bearing systems High precision offers accurate placement of carriage
External Search Motion Control Stepper Motor Servo Motors and Drives Gear Boxes
Wind tunnel wall Vertical Rail and Carriage Smoke wand Horizontal Rails and Carriages Wind Tunnel X Z
Smoke Wand Vertical Rail and Carriage Horizontal Rail and Carriage Truck profile Wind Tunnel Horizontal Rail and Carriage Wind tunnel wall X Z
Possible project scope change Wind Tunnel Wind tunnel wall Vertical Rail and Carriage Horizontal Rail and Carriage Cantilever cable support Carbon Fiber Smoke Wand X Z
PDS completion – January 30 th Two axis motion 20’ Horizontal travel 17’ Vertical travel Zero residual impact when not in use Removes itself form wind tunnel completely when not in use Aerodynamic Profile External and Internal Search – February 17 th Concept selection – February 22 nd Cantilever Detailed Design– February 22 nd to May 18 th Fabrication completion – May 31 st Product delivery – June 16 th
Load Calculations Gravity on the Horizontal rail 355 N Gravity on the smoke wand 107 N Wind load on the smoke wand Distributed load of 361N Moment of 990 N*m at wand support rollers Weight of the entire system Horizontal Rail Smoke Wand Vertical Rails Horizontal Carriage Wind Tunnel Wall Vertical Carriages Drive Motor Wand Support Rollers Wind Tunnel X Z
Mechanical Component Selection Horizontal rail and carriage Vertical rail and carriage Lifting mechanics Lifting motors Structural Design Vertical rail supports Baseplate mounting Structure stabilization
Control System Safety Operational safety Limit switches Human interaction Zero energy state Vertical motion lockout
Questions