Dr Obbs
@dr_obbs • 33,737 subscribers
Engineer, PhD Fluid Mechanics, @brakingbiaspod, ✝️, Proud husband and dad, 🇹🇷/🇺🇸 lived in 🇩🇪 🇬🇧 Motorsport Tech with a side of humor.
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Great simulation of the Ferrari Döner wing posted on LinkedIn by Dominik Bolasko. There are still some irregularities in this simulation, like the wing profiles being different than the actual Döner wing, but it looks to be one of the more accurate sims I have seen so far. One very interesting aspect of this simulation is the magnitude of the flow field disruption from the intermediate sail position. All DRS flaps naturally have a hysteresis with respect to flow recovery and attachment on flap closure. Hysteresis, in the simplest terms, is the difference in the value you get from the same device in one setting compared to another. In this case what we are looking at is the downforce the wing give you before opening, and after opening. So why would you have hysteresis? Well the flow will take some time to recover snd reattach after a big geometry change bringing back the full load (downforce) to the rear of the car for the braking zone. This exists for all cars that have a flap geometry change like this. However, the magnitude of the flow disruption can further delay this recovery causing the car to not re-establish the full load potential in the first phase of braking. So, I could certainly believe that the hysteresis for this type of wing would be greater than that of a conventional flap because of how much flow disturbance you have from that intermediate sail position. Meaning the rear of the Ferrari on initial braking could have some nervousness as the flow takes more time to re-attach and recover the load on the rear wing. In fact, this is exactly what Dominik found in his simulations (image 2). I did speak with someone with a team, and this was one aspect they indeed had considered as a negative to this design when they first saw it. It’s possible that’s part of what was being tested when they ran it during testing in Bahrain. Do you think we will see this wing again during the season?
Dr Obbs78,838 次观看 • 3 个月前
So what’s going on with the recent updates to the RB21? Would you believe that it stems from an issue discovered in 2024 on the RB20? That’s right, rear end grip and overall corner balance has been a problem for the recent Red Bull cars as far back as 2024, and issues with the quality of flow in the diffuser. In certain high roll conditions, or at certain tracks, the diffuser was prone to big losses ultimately causing the entire floor to lose load. Recent updates have been targeting to bring this back to a more stable performing window. One added benefit of this is that a properly performing floor can bring better rear load without the aid of a larger inefficient rear wing for balance. As the floor is more efficient this can aid in overall car efficiency and top speed. I don’t think this is the magic pill to fix all their problems, but it sounds like the floor is providing all of the performance they had hoped for, and the signs are indeed encouraging. Maybe this will help Max to fight more at the sharp end with the McLarens? (Apologies for the poor audio from the wind at the start)
Dr Obbs34,231 次观看 • 11 个月前
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