Automotive air intake utilizing a vortex generating airflow system
An airflow system is provided that utilizes a vortex generator to efficiently draw ambient air into one or more automotive heat exchangers. Due to the use of the vortex generator, the air intake may be much smaller than that used in a conventional system and may have a significantly different aspect ratio from that of the heat exchanger, thus providing additional vehicle design flexibility. The vortex generator may use a single outlet or multiple outlets, and may be coupled directly or via a transition duct(s) to the heat exchanger(s).
1. An automotive airflow system comprising:
a vortex generator, said vortex generator comprising:
an elongated duct defining an axial centerline;
a primary inlet and at least one outlet, wherein a first outlet of said at least one outlet corresponds to a first end of said elongated duct, wherein said primary inlet is elongated and defined by a primary inlet length and a primary inlet height, wherein a first axis corresponding to said primary inlet length is parallel with said axial centerline of said vortex generator, wherein ambient air flows into said vortex generator through said primary inlet; and
at least one automotive heat exchanger, wherein said ambient air flows out of said vortex generator through said at least one outlet and into said at least one automotive heat exchanger.
2. The automotive airflow system of claim 1 , wherein a first cross-sectional area corresponding to a total cross-sectional area of said at least one outlet is at least 3 times larger than a second cross-sectional area corresponding to said primary inlet.
3. The automotive airflow system of claim 2 , wherein said first cross-sectional area corresponding to said total cross-sectional area of said at least one outlet is at least 4 times larger than said second cross-sectional area corresponding to said primary inlet.
4. The automotive airflow system of claim 3 , wherein said first cross-sectional area corresponding to said total cross-sectional area of said at least one outlet is at least 5 times larger than said second cross-sectional area corresponding to said primary inlet.
5. The automotive airflow system of claim 4 , wherein said first cross-sectional area corresponding to said total cross-sectional area of said at least one outlet is at least 6 times larger than said second cross-sectional area corresponding to said primary inlet.
6. The automotive airflow system of claim 1 , wherein an aspect ratio corresponding to said primary inlet is at least 4:1, where said aspect ratio is defined as a ratio of said primary inlet length to said primary inlet height.
7. The automotive airflow system of claim 6 , wherein said aspect ratio corresponding to said primary inlet is at least 8 to 1.
8. The automotive airflow system of claim 7 , wherein said aspect ratio corresponding to said primary inlet is at least 12 to 1.
9. The automotive airflow system of claim 8 , wherein said aspect ratio corresponding to said primary inlet is at least 16 to 1.
10. The automotive airflow system of claim 1 , wherein an aspect ratio corresponding to each outlet of said at least one outlet is in the range of 1:1 to 1:2, where said aspect ratio is defined as a ratio of an outlet width to an outlet height.
11. The automotive airflow system of claim 1 , wherein a first aspect ratio corresponding to each outlet of said at least one outlet relative to a second aspect ratio corresponding to each heat exchanger of said at least one heat exchanger is in the range of 1:1 to 1:2, wherein said first aspect ratio is defined as a ratio of an outlet width to an outlet height, and wherein said second aspect ratio is defined as a ratio of a heat exchanger width to a heat exchanger height.
12. The automotive airflow system of claim 1 , wherein an average ratio of said primary inlet height to an outlet height is 0.5 or less.
13. The automotive airflow system of claim 1 , said vortex generator further comprising a secondary inlet aligned with said axial centerline, wherein ambient air passing through said secondary inlet is injected directly into a core of said vortex generator.
14. The automotive airflow system of claim 1 , wherein said primary inlet is coupled to said elongated duct along an upper surface of said elongated duct.
15. The automotive airflow system of claim 1 , wherein said primary inlet is coupled to said elongated duct along a lower surface of said elongated duct.
16. The automotive airflow system of claim 1 , wherein a ratio of said primary inlet length to a duct length corresponding to said elongated duct is at least 0.25.
17. The automotive airflow system of claim 16 , wherein a ratio of said primary inlet length to a duct length corresponding to said elongated duct is at least 0.50.
18. The automotive airflow system of claim 17 , wherein a ratio of said primary inlet length to a duct length corresponding to said elongated duct is at least 0.75.
19. The automotive airflow system of claim 1 , wherein said elongated duct comprising said vortex generator has a conic cross-section.
20. The automotive airflow system of claim 19 , wherein said conic cross-section is circular.
21. The automotive airflow system of claim 19 , wherein said conic cross-section is elliptical.
22. The automotive airflow system of claim 1 , wherein a cross-section corresponding to said elongated duct of said vortex generator is defined by an involute of a conic.
23. The automotive airflow system of claim 1 , wherein a cross-section corresponding to said elongated duct of said vortex generator is uniform throughout said elongated duct.
24. The automotive airflow system of claim 23 , said vortex generator further comprising a second outlet of said at least one outlet, wherein said second outlet corresponds to a second end of said elongated duct, wherein said first outlet is distal from said second outlet, wherein said ambient air flows into said vortex generator through said primary inlet, and wherein said ambient air flows out of said vortex generator through said first outlet and into a first heat exchanger of said at least one automotive heat exchanger and flows out of said vortex generator through said second outlet and into a second heat exchanger of said at least one automotive heat exchanger.
25. The automotive airflow system of claim 1 , wherein a cross-section corresponding to said elongated duct of said vortex generator is non-uniform throughout said elongated duct.
26. The automotive airflow system of claim 25 , wherein a second end of said elongated duct is closed, wherein said second end is distal from said first outlet, and wherein a first cross-sectional area corresponding to said second end is smaller than a second cross-sectional area corresponding to said first outlet.
27. The automotive airflow system of claim 26 , wherein a rate of growth between said first cross-sectional area and said second cross-sectional area is 3.6r mm 2 /mm or less, where r equals a radius corresponding to said first outlet.
28. The automotive airflow system of claim 25 , said vortex generator further comprising a second outlet of said at least one outlet, wherein said second outlet corresponds to a second end of said elongated duct, wherein said first outlet is distal from said second outlet, wherein said ambient air flows into said vortex generator through said primary inlet, and wherein said ambient air flows out of said vortex generator through said first outlet and into a first heat exchanger of said at least one automotive heat exchanger and flows out of said vortex generator through said second outlet and into a second heat exchanger of said at least one automotive heat exchanger, wherein a first cross-sectional area corresponding to a cross-section of said elongated duct midway between said first outlet and said second outlet is smaller than a second cross-sectional area corresponding to said first outlet, and wherein said first cross-sectional area is smaller than a third cross-sectional area corresponding to said second outlet.
29. The automotive airflow system of claim 1 , further comprising at least one transition duct coupling said at least one outlet of said vortex generator to said at least one automotive heat exchanger.