Avida 12 Wind Resistance Testing Reveal Improvement Strategies
Avida, a prominent automaker, shed light on their latest wind resistance testing of the Avida 12 vehicle model during an official livestream. The testing took place in China's Automotive Research Institute (CARI) wind tunnel laboratory.
According to the results, the Avida 12 demonstrated:
Low-Wind Resistance Rotors and Active Rearview Cameras
Using low-flow wheels and active rearview cameras, the Avida 12 displayed a windshield resistance coefficient of 0.2175 at a velocity of 120 km/h (74 mph) and 0.2170 at a velocity of 160 km/h (99 mph).
Testing Scenarios:
- Low-flow wheels + Active Rearview Cameras, 120 km/h
- Low-flow wheels + Active Rearview Cameras, 160 km/h
Performance Comparison with Dynamic Rims
The Avida 12 showed that when equipped with dynamic rims and active rearview cameras, the wind resistance coefficient increased to 0.2326 at a velocity of 120 km/h compared to using low-flow wheels alone.
Additional testing scenarios include various combinations involving external rearview mirrors and suspension adjustments, which resulted in fluctuations to the Avida 12's windshield resistance coefficient across different models.
Some additional data points:
- Traditional external rearview mirror + Increased Suspension Height + Running Dynamic Rims at 120 km/h: Wind Resistance = 0.2508
- Traditional external rearview mirror + Increased Suspension Height + Running Dynamic Rims + Active Exhaust Gate Openment: At 120 km/h, the Coefficient of air friction increased dramatically reaching 0.2741
The Meaning and Calculation of Wind Resistance
Wind resistance is a defined mathematical parameter derived from experiments conducted on wind tunnels, including descending tests. It follows this formula: [C_{w} = \frac{P}{\rho\times A_v\nu}].
Here the formula used values such as:
- (C_w) represents the wind resistance.
- (P) is the pressure force (in Newtons).
- (\rho) denotes air density (kg/m^3) for this experiment's purpose to maintain realist conditions it has to reflect those encountered on open roads.
- (\times A_v) for area calculation: represents the cross-sectional frontal Area (m² or "meter-squared"), which refers to car front projected footprint at different speed settings, taking into account aerodynamic behavior of a given automobile during movement.
- ( \nu), speed of an object in (m/sec) units as speed.
In conclusion: Wind resistance coefficients directly affect total drag experienced on the road and consequently can indirectly reflect energy expended driving over various distances, indicating how changing wheels or adding electronic rear view systems may help minimize drag.
