In recent years, a popular saying: Stand up and outlet pigs can fly, think pigs can fly for two reasons, one is windy, and second, the big drag coefficient of pigs; of course, this is just a joke if. For fast-moving vehicle, the drag is too large not only reduce the speed of impact of driving stability, resulting in wind noise affect comfort, but also a waste of fuel economy and power prices, so things like cars and other vehicles will work hard in the exterior design, design to reduce the drag coefficient of linear flow as much as possible.
To test the drag coefficient must wind tunnel test, wind tunnel test to placement of the aircraft or other object models in a wind tunnel, and the gas flow studies and models each action, in order to understand the experimental procedure actually an air powered aircraft or other aerodynamic characteristics of the object. As BARI domestic automobile testing authority has a world-class automotive wind tunnel laboratory: BARI China Automotive Wind Tunnel Center has a full-size car aerodynamics mdash; acoustic wind tunnel (AAWT), automotive wind tunnel (CWT ), and is equipped with a high temperature environment positions, axis CNC machining centers and high-performance 1200 core simulation platform, the advanced aerodynamics, thermodynamics, wind noise performance standards developed.
September 9, long comfortable moving into Chinese BARI PLUS aerodynamics – acoustic wind tunnel test chamber, in live form, public participation in industry first third-party certification testing low drag car, eventually moving PLUS Plaza to drag coefficient 0.27Cd, aerodynamic drag 411.86N (120km / h) of outstanding achievements by China BARI ldquo; low drag car rdquo; certification, performance reached leading domestic level the same level of fuel cars. Currently drag coefficient within the industry mainstream fuel cars roughly between 0.28-0.4Cd, the following general 0.3Cd even excellent results.
so long comfortable moving to Quebec PLUS is such a low drag coefficient of it?
Long movable PLUS ease of CFD (computational fluid dynamics) technology team through a series of rigorous scientific proof reliability analysis, has done includingKey parts of the front 13, the front bumper, engine cover, the front windshield, A pillar, the vehicle body side portion, roof, mirrors, rear window, the rear, the trunk, and the rear bumper of the vehicle wheel cavities and the like, vehicle 22 key parameters to optimize processes, fully optimized aerodynamic performance of the vehicle. In general can be divided into two aspects, one is the overall design optimization, on the other hand is to optimize the design of the local.
First, the overall design optimization
Yat move PLUS using streamlined fashion dynamic aesthetic design, simplify cross-cutting ceremony followed the family front face design. Side waist simple and clean, sporty, multi-line shape tail to create a strong sense of hierarchy, so that every movement of DNA into the body of the vehicle, passing from the front to the rear, just to bring you all have life like the rhythm of a new generation of handsome sporty appearance.
Second, the partial design optimization
1) Dress front windshield wipers wipers, wiper brush is smaller, is not only easier to install, use less noise and bring less wind resistance, by contrast, reduce 0.002Cd wind resistance.
2) water-cooled type cooling device nacelle, right front grille inlet opening boundary, needs to ensure a low aerodynamic drag, the water-cooled type cooling device nacelle embodiment to address the cabin thermal management requirements, to avoid engine compartment temperature is too high to achieve while reducing engine temperatures, reducing the demand for wind resistance.
3) a bottom front arc lip optimized to meet the angle of approach at the same time, so that the front arc lip more full, the gas flow into the bottom of the car more fitting.
4) installation of the A-pillar trim, trim strip recess located at the connection between the A-pillar and the front windshield, can effectively reduce the area wind resistance and wind noise value due to higher cost of the parts, now only the same level Yi and a few models equipped with movable PLUS.
5) The roof laser welding process, laser welding Yi movable PLUS technology, stronger compression compared to normal spot,Inherent in conventional design and no sink flow, the cap over the smooth side panels, roof shape flatter, better sealing, and to further reduce wind resistance. Not only safe, comfortable and beautiful, but also help reduce wind noise and fuel consumption.
6) using shark fin roof antenna, from the bionic design technology, and the use of aerodynamics, effectively eliminating the conventional rod antenna airflow noise, the running quieter.
7) surface roughness of the hub, a tire outer reduced flow separation.
8) after the wind design optimization, the design is more inclined windshield little smoother compared to traditional sedan cars, and increase the shortened rear upturned duckling tail design makes Yat move more movement on the PLUS dynamic modeling, and more conducive to direct airflow, reduce wind resistance. After both sides of the bumper
9) distinct characteristic line, the direction of flow separation guide tail; body side more pronounced contours while reducing drag.
Conclusion: Yat move PLUS has the advantage of low wind resistance for better fuel economy in its (hundred kilometers as low as 5.9L, per tank can run a 190 km), superior NVH performance (high speed is more quiet, quieter) and superior driving control experience. So as a burst models (listed in March after five consecutive months of sales so far over a million, in July even beyond Geely Dorsett became the only car among the sales charts TOP10 of Chinese brand cars) can attract so many consumers rely not only Yen is the real value of product strength.