Project Review
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
Project Review
Tunnel Details 12,000 sq. ft. facility Wind speeds up to 65 30ft long test section
21ft wide
26ft tall
Project Review
Tunnel Details Pressure sensitive floor for
calculating trucks drag coefficient.
Smoke wand for flow visualization
Rotating floor panel to test various angles of attack
Project Review
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
Mile Stone Progress
PDS completion – January 30th 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 17th
External Search
Test Subject
Pressure ProbeAir Flow
Typically, traversing systems are used to study the airflow behind a test model (ex. pressure probe is downstream of the test subject)
External Search
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.
External Search
Roof Mounted Traversing Probe
Traversing Volume 3m x 4m x 6m
Positional Accuracy +/- 1mm
External Search
Roof Mounted Traversing Probe full size automotive wind tunnel downstream probe
Traversing Volume 5m x 12m x 13m
Positional Accuracy +/- 1.5mm
External Search
Linear Actuators Pre-fabricated Sealed Unit
Reliable
External SearchRail and Linear bearing systems
High precision offers accurate placement of carriage
Internal Concept: Vertical Floor Rail
Wind tunnel wall
Vertical Rail and Carriage
Smoke wand
Horizontal Rails and Carriages
Wind Tunnel
X
Z
Internal Concept: Vertical Floor Rail
Smoke Wand
Vertical Rail and Carriage
Horizontal Rail and Carriage
Truck profile
Wind Tunnel
Horizontal Rail and Carriage
Wind tunnel wall
X
Z
Internal Concept: Cantilever
• 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
Mile Stone Progress
PDS completion – January 30th 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 17th
Concept selection – February 22nd Cantilever
Detailed Design– February 22nd to May 18th
Fabrication completion – May 31st
Product delivery – June 16th
Detailed DesignLoad 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 MotorWand Support Rollers
Wind Tunnel
X
Z
Detailed Design
Mechanical Component Selection Horizontal rail and carriage Vertical rail and carriage Lifting mechanics
Lifting motors
Structural Design Vertical rail supports Baseplate mounting Structure stabilization
Detailed Design
Control System Safety
Operational safety Limit switches
Human interaction Zero energy state Vertical motion lockout
Top Related