Lab 6 Submission Sheet

Keep answers as short as possible while still meeting specifications. Submit as a PDF.

Team Number:

Team Member Names:

Measured Calibration Curve for Wind Tunnel Fan Speed vs. Air Velocity

Effort:

• Present
• Includes zero speed calibration measurements

Complete:

• Discusses what to do with zero speed measurements. That transform is reflected in final calibration curve.
• Calibration curve shows correct numbers.
• Calibration curve shows correct regression line and uncertainty bounds.

Plots of Drag Forces on Cylindrical Objects

This section calls for eighteen total graphs:

• Nose 1 measured drag force vs. Reynolds number.
• Nose 1 measured coefficient of drag vs. Reynolds number.
• Nose 1 simulated drag force vs. Reynolds number.
• Nose 1 simulated coefficient of drag vs. Reynolds number.
• Nose 1 simulated velocity profile.
• Nose 1 simulated pressure contour plot.
• Nose 2 measured drag force vs. Reynolds number.
• Nose 2 measured coefficient of drag vs. Reynolds number.
• Nose 2 simulated drag force vs. Reynolds number.
• Nose 2 simulated coefficient of drag vs. Reynolds number.
• Nose 2 simulated velocity profile.
• Nose 2 simulated pressure contour plot.
• Nose 3 measured drag force vs. Reynolds number.
• Nose 3 measured coefficient of drag vs. Reynolds number.
• Nose 3 simulated drag force vs. Reynolds number.
• Nose 3 simulated coefficient of drag vs. Reynolds number.
• Nose 3 simulated velocity profile.
• Nose 3 simulated pressure contour plot.

Effort:

• Graphs are present for at least one nose cone
• Calibration information, the zero fan speed lift and drag, is reported.
• Reference area used for finding drag coefficients is reported.

Complete:

• All plots show correct values.
  
• Calibration information and reference area are correct.
• Discussion of differences between simulations and measurements lists plausible factors that could cause discrepancies.

Plots of Drag Forces on Scale Robot Model

This section calls for four total graphs

• Measured drag force vs. Reynolds number
• Measured drag coefficient vs. Reynolds number
• Simulated drag force vs. Reynolds number
• Simulated drag coefficient vs. Reynolds number

Effort:

• All four graphs are present
• Calibration information, the zero fan speed lift and drag, is reported.
• Reference area used for finding drag coefficients is reported.

Complete:

• All plots show correct values.
  
• Calibration information and reference area are correct.
• Discussion of differences between simulations and measurements lists plausible factors that could cause discrepancies.
• Explanation of how similitude lets us use a scale model of the robot in the wind tunnel and a full-sized model of the robot in simulated water flow.

Plots of Lift and Drag for Flat Plate and NACA Airfoils at Different Angles of Attack

This section calls for six total graphs.

• Flat plate lift force vs. Reynolds number
• Flat plate coefficient of lift vs. Reynolds number
• Flat plate pressure contour plot
• NACA airfoil lift force vs. Reynolds number
• NACA airfoil coefficient of lift vs. Reynolds number
• NACA airfoil pressure contour plot vs. Reynolds number

Effort:

• The flat plate graphs are present.
• Includes a reference area and reference length for the flat plate measurements with one sentence of justification.

Complete:

• All plots are present.
• All performance numbers are reported
  • Pressure on the bottom of the flat plate wing compare to the top of the flat plate wing at a 15 degree angle of attack
  • NACA 6412 wing’s Coefficient of Lift compared to the flat plate at an angle of attack of 15 degrees
  • Pressure differences between the top and bottom surfaces of the NACA 6412 wing compare to the pressure difference on the flat plate at 45 m/s and a 15 degree angle of attack
• Brief (4 sentence) discussion considering performance numbers and comparing NACA airfoil to flat plate wing.