Reducing aerodynamic drag through better handling of front-end flows. Note that my most recent aero book (replacing the one shown in this video) can be found here - www.amazon.com/Vehicle-Aerody... or Amazon in your country.
Пікірлер: 54
@simonmartin_ch Жыл бұрын
This is an excellent explanation. I have observed this trend with the bonnet vents in supercars and started wondering why everyone was doing it. Awesome video!
@JulianEdgar Жыл бұрын
Glad it was helpful!
@omg_stoppit15 күн бұрын
Julian, ever since I watched this video years ago, I kept in mind the patent to reduce the frontal area. Recently, we've seen a bunch of cars, from the Polestar 3 to the Acura ARX-06 to the new Charger incorporating the design feature. I just thought it was funny how it all came full circle starting with this video!
@JulianEdgar15 күн бұрын
Not sure what you mean by reducing the frontal area? None of the patents reduce the projected frontal area, which is the multiplier for Cd to give total drag.
@magnusdanielsson27494 жыл бұрын
This would be perfect for my Fiero I think. Original it takes in air low, through the radiator and it then needs to do a very sharp turn to exit under the car. This produces alot of lift in the front, already at 90 km/h.
@xXZ31t6esTXx4 жыл бұрын
This is exactly the video I was waiting for. If you check for my past comments you will realize
@Brrrrt6754 жыл бұрын
Thank you for these highly educational videos, subscribed!
@JulianEdgar4 жыл бұрын
Glad you like them!
@daleandersen67304 жыл бұрын
Very nice design and clever! in addition, hot air short cycling (while stopped) would be prevented.
@marlinmack2570 Жыл бұрын
Julian I would like to thank you for all of your videos and the wealth of knowledge you have been. I was finally able to show support for you and purchased your book on air suspension. I hope that you remain active on here and continue to make books and videos!
@captaincurd2681 Жыл бұрын
Same here...
@JulianEdgar Жыл бұрын
Thanks, but I don't think I'll make many more videos.
@kovacspis Жыл бұрын
@@JulianEdgar Why not?
@JulianEdgar Жыл бұрын
@@kovacspis People typically watch half of one video, get completely the wrong idea, and then do bad modifications. Not really the result I was after!
@nickcastillo2567 Жыл бұрын
Fascinating...
@ShoshinMizu3 жыл бұрын
Excellent video. I am building my car and have been searching for better cooling solutions. My idea was to try and get the air through the radiators and over the turbo, then onto the windscreen to try and create some under hood heat exhaust action. I might just try to copy this. Might have to try and make a mold of some sort. Make it out of fiberglass or something.
@JulianEdgar3 жыл бұрын
Don't guess. Measure first.
@ScaniaFung3 жыл бұрын
looks like it also reduce drag of the bubble in front of windshield
@obeynemo3 жыл бұрын
Any chance you can do something on the Mercedes 190 Evo 2 as this was the car that supposedly made Bmw redesign there wind tunnel... Keep up the good work, loving the videos.
@JulianEdgar3 жыл бұрын
I don't know of any detailed technical data on the aero of the car.
@renegadeflyer2 Жыл бұрын
I was wondering if they extended the guide panel beyond the radiator hot exit. If properly done it would draw more air threw the radiator. Just a thought .
@narancs5Ай бұрын
It seems like the first patent uses a very similar principle to the solution seen on big trucks with huge frontal area.
@JulianEdgarАй бұрын
Not really.
@ashleyjwilliamshand2 жыл бұрын
If you look at the front of the 2012-2017 Mitsubishi Mirage (Pre 2017 Facelift models only), you see a upper un-ducted intake slit in the front bumper. Given it's position, and if you used the stock vertical radiator with a sealed path to a hood vent/extractor... And if you ducted this slit as pictured, do you think it could accomplish this effect? Edit: Love the videos, about to order your books, and your Autoblog articles blew my mind when I first read them in 2009. They are still amazing, and have recommended them countless times to other enthusiasts.
@JulianEdgar2 жыл бұрын
Thanks for the praise. I think the first step would be to see if you can duct the radiator outlet to a hood vent. That's usually pretty well impossible in normal front engine, ICE cars.
@dukinse51982 жыл бұрын
Hello Julian, just today i saw in person jaguar i-pace. So nice car and i noticed many aero characteristics. One question i noticed something weird behind rear wheels... like a perpendicular fin. Any idea about that? How it helps in aero?
@JulianEdgar2 жыл бұрын
Got a link to a pic?
@JulianEdgar2 жыл бұрын
Separation edge
@dukinse51982 жыл бұрын
@@JulianEdgar i thought those are to reduce wake? It prevents airflow from the rear wheels to the back bumper?
@JulianEdgar2 жыл бұрын
I wouldn't think so. Don't look at the styling details but just look at the vertical separation lines that extend from bottom to top.
@dukinse51982 жыл бұрын
@@JulianEdgar ok, thanks. Jaguar seems to really design this car with an emphasis in aero. Looks amazing and muscular too. Very nice 👌.
@doug-core8850Ай бұрын
I've been considering stuff like this for awhile to change the cooling of the coyote powered falcon. Thing just doesn't get the cooling it deserves
@JulianEdgarАй бұрын
It's easy to develop a car cooling system to give better outside airflow. All covered in my book. www.amazon.com.au/Vehicle-Aerodynamics-Modification-Development-alternative/dp/B0C87VYVL8
@lauriedooker10312 жыл бұрын
Why have a flap or gate at the entrance of the heat exchanger duct ? Sub zero air temperatures? Like a aircraft ? I don’t get that one.
@JulianEdgar2 жыл бұрын
Most cars today have radiator shutters that open or close, depending on cooling requirements. Maybe buy my book? www.amazon.com.au/gp/product/1787112837
@ScaniaFung3 жыл бұрын
hard to do it on front engine car
@jezreelespeleta3711 Жыл бұрын
what if instead of taking in the cooling airflow from the front, take the cooling airflow from an opening under the car and use the top ducted airflow to pull air from the bottom through the heat exchangers and out to the top of the hood?
@JulianEdgar Жыл бұрын
Yes you could do that if you were happy with a lower pressure difference (ie less flow) across the heat exchangers.
@babumoshai61914 жыл бұрын
The air coming from the bonnet will be high velocity.What about the air coming from the radiator? Dont we need low velocity air near the cowl?
@JulianEdgar4 жыл бұрын
I don't think we *need* low velocity near the cowl, as such. We *get* a lower velocity there because of the increase in pressure at the base of the windscreen. I also think the way the patent describes low/high velocities might be relative, eg a higher velocity exiting the bypass duct than the bonnet flow, but not a high velocity compared to, say, the freestream.
@ErrorMargin3 жыл бұрын
Can you share the patent numbers and links? I’d like to study these in detail.
@JulianEdgar3 жыл бұрын
The links are in the video.
@ErrorMargin3 жыл бұрын
Here are the links: patents.google.com/patent/US10577034B2 and www.ipo.gov.uk/p-ipsum/Case/PublicationNumber/GB2555823
@ErrorMargin3 жыл бұрын
@@JulianEdgar What is your take on this one: patents.google.com/patent/US10179613B2 I'm building a Dodge Caliber track car and looking at how to manage airflow for square backed cars.
@JulianEdgar3 жыл бұрын
It is far better to do some testing (eg by measuring of wake pressures) with various aero mock-ups in place than to copy patents. Step-by-step test and development is the best approach. See www.amazon.com/gp/product/B08L5TN94J
@user-pc1er8zy7cАй бұрын
So that's the reason behind the frontal side panels on european trucks.
@darrens37 ай бұрын
The example cars are Jaguars so I believe that these patents are from Jaguar, correct?
@JulianEdgar7 ай бұрын
Yes, didn't I say that in the video?
@janiwallin4825 ай бұрын
Hi. I don't know anything about the subject, but you didn't address one point. You know how a paint sprayer works. If you imagine that the hot air (paint) comes through the radiator and the air passing over the hood (compressed air) is directed through the channel to which the hot air channel is connected. Isn't there a "carburetor phenomenon" going on here?
@JulianEdgar5 ай бұрын
Sure, one flow helps entrain the other.
@doug-core8850Ай бұрын
A venturi effect by the looks of it. Helps by sucking the air up and out of the heat exchanger, increasing airflow speed I guess
@harshithsadhana74754 жыл бұрын
tesla cars have almost flat front.
@xXZ31t6esTXx4 жыл бұрын
The so called refreshed model s has something like this