# How the rear area of low pressure is going

2010-01-24 06:02:09 +0000 #1
I've seen from a car racing game and played the game and looking at the back of the car when the game close to the rear of the car in front when the back of the car would be to use the vehicle in front of the area of low pressure overtaking, I know that the resistance of that region is small, easy to accelerate, but the explanation from the Internet is "the rear diffuser and rear wing are under increasing pressure. racing under the most pressure to have come from the rear diffuser and the tail. airflow through the rear diffuser and rear wing when the air will flow into the top and bottom to form an area of low pressure, if there is too close to the car with the words, it's under pressure to get on the small, right behind the car are very serious interference, "I do not understand, given that it should interfere with good overtaking ah? But why so many drivers to overtake borrow area of low pressure? I have a guess: the tail area of low pressure to play the role of traction

2010-01-24 06:10:16 +0000 #2
F1 car at the bottom at high speed when the is a vacuum, that is, low-pressure area. Will be high-speed airflow through the chassis, the rear end of the diffuser flow, and tail. F1's diffuser and rear wing after the combination of air flow from the bottom of the high-speed airflow diffuser to surround the body will be going up, while the gas flow from the wing and the diffuser airflow combined, but because the direction of flow rate (studied third-year physics know that velocity is not the same as the upper and lower) and difference in the turbulence on the defense a great disturbance in the car, we look at F1 will find that when overtaking, the front wing has been Akira! And because the speed too fast! Airflow will be some distance away from the car, and this is the so-called vacuum belt! Overtaking on with this, but this is because it is a vacuum, and almost no air, so the pressure immediately before the men decreased

a modern F1 car is not so much with the ordinary civilian vehicles that have a certain similarity, the more appropriate to say and is more similar to jet fighters. In this campaign, aerodynamics has become the key to victory in each of the teams will spend hundreds of billions of dollars in huge amounts of money to develop the aerodynamic design of the layout.

As an aerodynamic design, first of all need to focus on the following two questions: one, looking under the pressure support, which is the car in a straight line to accelerate and enhance cornering performance, a key; 2, reduce resistance, reduce the turbulence around the car to the car velocity.

Most of the fleet 90 years from the last century that people began to adopt the existing familiar wing format. Used in civilian vehicles and aircraft wing wing format exactly the same principle, but need the opposite effect. According to fluid mechanics of the Bernoulli principle, due to air flow on both sides of wing speed differences have led to both sides of the vane pressure differential, you want to balance the pressure difference on both sides of the wing pieces are bound to the direction of movement to the low atmospheric pressure. Aircraft using wings to take off, while the civilian vehicle is to make use of fixed-wing downforce. Since aerodynamic downforce produced by the existence of a modern F1 car can generate the equivalent of 3.5 G force (3.5 times the weight in the car) horizontal rotary power. This means that, in theory, the car at high speeds can be achieved when the 180-degree flip.

In the early F1 campaign had tried to move and high fixed-wing format, but in the end led to a number of serious incidents. Into the last century, 70 years after the establishment of technical rules limiting the wing size and location. Since then, these rules still proved to be correct.

70 mid "ground effect" under the pressure generated was found. The so-called "ground effect" refers to Team Lotus engineers found that if the bottom of the car to install a huge piece of the wing, the entire cars can be produced under the same wing as the pressure support, while firmly close to the ground. The discovery of the final product is the birth of Buram BT46B car, this car from Gordon - Murray penned. Car installation of the cooling fan will be racing the bottom of the skirt region, pumped air, this designed for the car, under tremendous pressure support. However, because of opposition by other teams, this one race car during the trial are duly banned. Meanwhile, the technical rules has been modified to restrict the use of "ground effect" to increase the downforce, bear the brunt of that is prohibited in the car manufacturing side of the low-pressure area, and later introduced the so-called "ladder-style chassis" requirement.

Although many of the team's aerodynamic research and development departments have a large-scale wind tunnel tests and a lot of computer-aided software, but the aerodynamics of F1 the most fundamental principles remain unchanged: it is under increased pressure as much as possible by little resistance. According to a starting pressure for the track under different teams in each race will be to install a different front and rear wing format. Like Monaco, so narrow, slow track need to be more radical wing format, you will see the car's tail is two completely separate wing piece (currently provides up to two tail format). But on the contrary, in such a high-speed Monza circuit, you can see the car as much as possible to reduce wing of the wing, thereby reducing the resistance of the car in order to facilitate faster speed on the straights.

From the suspension structure of the system to the driver's helmet, each of a modern F1 car parts are fully taken into account aerodynamic effects is reasonable. Affect the speed of the car because of the positive contact with the body produced by the airflow has been blocked due to turbulence. Look at the current F1 car, you will find almost every hidden part of the decrease in both resistance and increase the pressure under the design philosophy. Wing at both ends of the fixed format to prevent the formation of eddy current; installed in the car rear spoiler will be the rapid airflow through the car re-assembled, resulting in the formation of the rear car of a low pressure vacuum zone. But designers can not be too much but will the pursuit of high-speed airflow storage product, that modern F1 engines have significant amounts of heat generated by cooling in a timely manner to avoid overheating the engine cylinder shrinkage occurs.

In recent years, a number of Ferrari F1 team have to emulate the "thin" design, the rear of the car as much as possible in the narrow center of gravity lowered. In this way, can effectively reduce the resistance of Er Shi rear of the car to maximize airflow. In the racing side of the installation of "stratospheric board" design would be conducive to the formation of air flow and reduce turbulence.