- #1
TimeHorse
- 20
- 0
Okay, thanks Hikaru and K2 for your help on the accelerated drag problem. Now I have another drag related problem I wonder if you you help me with.
Say a car is put in a wind tunnel and is measured to have the following attributes:
Frontal Area: Ax
Side Area (Right): Ay
Frontal Coefficient of Drag: Cdx
Side Coefficient of Drag (Right): Cdy
Where the Frontal and Side forces are measured independently.
So say a wind is applied to this car with an overall speed of 20 m/s such that 16 m/s is applied in the X direction and 12 is applied in the Y. Can I simply compute:
[tex]\vec{F_{drag}} = \left(\frac{1}{2} \rho A_x Cd_x 256 \frac{m^2}{s^2}, \frac{1}{2} \rho A_y Cd_y 144 \frac{m^2}{s^2}, 0 \right)[/tex]
Or do I have to recompute A and Cd in the wind tunnel for wind incident at approximately 53° to figure out the forces involved in this situation?
Thanks!
Say a car is put in a wind tunnel and is measured to have the following attributes:
Frontal Area: Ax
Side Area (Right): Ay
Frontal Coefficient of Drag: Cdx
Side Coefficient of Drag (Right): Cdy
Where the Frontal and Side forces are measured independently.
So say a wind is applied to this car with an overall speed of 20 m/s such that 16 m/s is applied in the X direction and 12 is applied in the Y. Can I simply compute:
[tex]\vec{F_{drag}} = \left(\frac{1}{2} \rho A_x Cd_x 256 \frac{m^2}{s^2}, \frac{1}{2} \rho A_y Cd_y 144 \frac{m^2}{s^2}, 0 \right)[/tex]
Or do I have to recompute A and Cd in the wind tunnel for wind incident at approximately 53° to figure out the forces involved in this situation?
Thanks!
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