Mathematically speaking, the principle of a truck deflector
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In practical application, everyone often says that the truck deflector is fuel-efficient. However, apart from the claim of reducing wind resistance, we will theoretically explain to you exactly how the truck deflector reduces wind resistance. We will speak with data, and you will understand after reading it.
If you observe carefully the new types of cargo trucks nowadays, you will find that many of them have an additional "hat" on the top of their cabs, which adds a touch of vitality to the already tall and powerful cargo trucks. This cap is called a deflector. Its main function is to effectively reduce air resistance and lower fuel consumption when a truck is traveling at high speed.
Air resistance is the component force formed by the air force in the direction of travel when a car moves relative to the air in the air medium. Air resistance is proportional to the square of the car's speed; the faster the speed, the greater the resistance. If the ratio of air resistance to the driving resistance of a car is large, it will increase the car's fuel consumption or seriously affect the car's power performance. According to regular statistics from abroad, when a cargo truck travels at a speed of 96km/h, nearly 50% of its engine power is consumed in overcoming air resistance. Reducing air resistance is one of the effective ways to improve the fuel economy of automobiles.
Air resistance can be calculated by the formula F=(1/2)CρAv2. In the formula :C represents the air resistance coefficient; ρ represents the density of air. A represents the windward area of the car. V is the relative speed between the car and the air.
From the above formula, it can be seen that under normal circumstances, the magnitude of air resistance is directly proportional to the air resistance coefficient and the windward area, and is directly proportional to the square of the velocity. Therefore, when designing or improving products, the designers of truck manufacturers should focus on the two parameters C and A. The A value is restricted by the usage space and is not easy to be further reduced. Therefore, the main means to lower air resistance is to reduce the C value. Air resistance is composed of several parts, including shape resistance (58%), resistance from external components of the vehicle body (14%), internal circulation resistance (12%), surface friction (9%), and the horizontal component of the lifting force (7%). From the proportion of these components, it can be seen that the size of the C value is closely related to the shape of the car. Good streamlined design is crucial for high-speed trucks.
In order to reduce air resistance, in recent years, both at home and abroad, in addition to developing unique-shaped streamlined body designs, some models have also installed deflector hoods on the top of the cab to enhance the streamlined shape of the body, guide the airflow flowing above the cab, thereby reducing the overall C value of the vehicle, effectively improving the vehicle's power performance and economy, and ensuring the vehicle's high-speed performance.
If you observe carefully the new types of cargo trucks nowadays, you will find that many of them have an additional "hat" on the top of their cabs, which adds a touch of vitality to the already tall and powerful cargo trucks. This cap is called a deflector. Its main function is to effectively reduce air resistance and lower fuel consumption when a truck is traveling at high speed.
Air resistance is the component force formed by the air force in the direction of travel when a car moves relative to the air in the air medium. Air resistance is proportional to the square of the car's speed; the faster the speed, the greater the resistance. If the ratio of air resistance to the driving resistance of a car is large, it will increase the car's fuel consumption or seriously affect the car's power performance. According to regular statistics from abroad, when a cargo truck travels at a speed of 96km/h, nearly 50% of its engine power is consumed in overcoming air resistance. Reducing air resistance is one of the effective ways to improve the fuel economy of automobiles.
Air resistance can be calculated by the formula F=(1/2)CρAv2. In the formula :C represents the air resistance coefficient; ρ represents the density of air. A represents the windward area of the car. V is the relative speed between the car and the air.
From the above formula, it can be seen that under normal circumstances, the magnitude of air resistance is directly proportional to the air resistance coefficient and the windward area, and is directly proportional to the square of the velocity. Therefore, when designing or improving products, the designers of truck manufacturers should focus on the two parameters C and A. The A value is restricted by the usage space and is not easy to be further reduced. Therefore, the main means to lower air resistance is to reduce the C value. Air resistance is composed of several parts, including shape resistance (58%), resistance from external components of the vehicle body (14%), internal circulation resistance (12%), surface friction (9%), and the horizontal component of the lifting force (7%). From the proportion of these components, it can be seen that the size of the C value is closely related to the shape of the car. Good streamlined design is crucial for high-speed trucks.
In order to reduce air resistance, in recent years, both at home and abroad, in addition to developing unique-shaped streamlined body designs, some models have also installed deflector hoods on the top of the cab to enhance the streamlined shape of the body, guide the airflow flowing above the cab, thereby reducing the overall C value of the vehicle, effectively improving the vehicle's power performance and economy, and ensuring the vehicle's high-speed performance.
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