How Do You Know if Mini Cooper Is Aerodynamic
#31 
Posted 19 July 2014 - 08:13 PM
Eulerian solvers, weren't they in an episode of Dr Who? 
It's a bit unfair comparing Minis to bigger cars. There's nonetheless room for iv adults in at that place, then the CD is spring to suffer for something that so closely wraps that rider jail cell, even without the exterior seams. CD multiplied by frontal area is the minimum for performance comparisons & you ought to work length, interior space & weight into your formula to compare one design against another. Comparing required BHP for speed and/or acceleration plots would be simpler.
It would be interesting to come across what you could do with the seams, curt of removing them altogether.
#32
Posted xix July 2014 - 08:50 PM
Indeed. Over the years it has been the 'add ons' which have and then increased the elevate over what it had originally.
The bicycle curvation extensions, those huge wide mirrors on both sides and, in the later cars the ultra-wide wheels have all contributed to a drib-off in overall functioning, including fuel consumption, for no actual proceeds anywhere. In fact the Minis which handle best are those on 145 width tyres and arch extensions are non needed to run those.
#33
Posted nineteen July 2014 - xi:twenty PM
I don't take access to on unfortunately then I will be doing it the old fashioned way on solidworks
Merely googled "classic mini cad model" and found this:
http://www.3dcadbrow...px?3dmodel=5510
Dunno if you lot tin can utilise it. Plus don't really trust the solidworks solvers. Surely information technology would be better to mesh the car in an actually FEM/CFD package and solve using that programs congenital in eulerian solvers.
I have a copy of that model I call back (one similar) and its not accurate enough to aerodynamically examination, plus its 1 huge associates opposed to a single role and thus a nightmare to get through aerodynamic tests without errors. Still don't know if I have the time to do this merely if I did I would be building the model on solidworks and then creating the mesh and what non in ANSYS, and then running it through, so that gets rid of the bug with solidworks more often than not :) (Incidentally this would take to be done at my University, I don't have the money for the licences of the above software! )
#34
Posted 20 July 2014 - 12:12 AM
Juat an idea with regards to the seams on the Exterior here....
Wouldn't a simple GRP seam strip, much like the standard metallic seam strips be more drag efficient if they were angled out on either side ?
Might look abit odd merely principle over course!
#35
Posted 20 July 2014 - 08:00 AM
I don't have access to on unfortunately and then I volition be doing information technology the old fashioned manner on solidworks
Simply googled "archetype mini cad model" and plant this:
http://world wide web.3dcadbrow...px?3dmodel=5510
Dunno if yous tin use it. Plus don't really trust the solidworks solvers. Surely it would be improve to mesh the automobile in an actually FEM/CFD package and solve using that programs built in eulerian solvers.
I accept a copy of that model I remember (one like) and its not accurate enough to aerodynamically examination, plus its one huge associates opposed to a unmarried part and thus a nightmare to get through aerodynamic tests without errors. All the same don't know if I accept the fourth dimension to practise this but if I did I would be building the model on solidworks then creating the mesh and what not in ANSYS, then running it through, so that gets rid of the issues with solidworks mostly :) (Incidentally this would accept to be done at my University, I don't have the coin for the licences of the above software! )
Hmmm, Yes you wouldn't specially care about the machine beingness an assembly. If you could convert information technology to a office (I think you can do this in solidworks (right me if I am wrong)) then import it as a .footstep file into an FEM parcel similar abaqus/autodyn and do the meshing and solving in that package.
Aye and I know that inquiry licences are a killer, so I mean provided you don't use the results for monetary gain, at that place shouldn't be a trouble in using the university licence. I figure this is more out of involvement sake, and so that you lot (and others) can improve the fuel efficiency and performance of the mini.
#36
Posted 20 July 2014 - 08:04 AM
Just a thought, based on what has been suggested hither:
- Why non create a base model (regular wheels, no arches, no mirrors).
- Then run the simulation and obtain the Cd
- And so add these components, in different combinations and different specs,
- Calculate the Cd and then determine which combination has the greatest result on the Cd.
#37
Posted xx July 2014 - 10:l AM
Dave Vizards 'Mini Tech News' magazine March 1982 (available long earlier all the current Mini magazines appeared in 1990's)
(also note me listed as 'Roving Reporter' 
)
I accept however to discover the more in-depth technical report on Mini aerodynamics that I accept stored away somewhere in the loft.........
'Mini Aerodynamics' article and diagrams below past Peter Davney
Edited by mab01uk, xx July 2014 - ten:52 AM.
#38
Posted 20 July 2014 - 09:44 PM
flat bottom mini will assist a lot with elevation speed. some boot floor mods to get the frazzle out of the way, and then some ally sheet.
#39
Posted xx July 2014 - 11:41 PM
Love aerodynamics! Fascinating stuff!
#40
Posted 21 July 2014 - 06:49 PM
There were a series of articles washed in race car engineer a few years back regarding drag reductions and downforce increases with minis, i will try and find a link or something to them as they were quite interesting
Edit: Here is the overview by Carbon Weezel, the search is ongoing regarding the original manufactures which had more detail http://www.carbonwee...sting_mini.html
Edit 2: The search continues, but there is mention thatFeb 2010 Mini World has the article on Aerodynamics, starting pg sixty, but I have nevertheless to ostend
Edited past jakejakejake1, 21 July 2014 - 07:25 PM.
#41
Posted 21 July 2014 - 07:46 PM
flat lesser mini will help a lot with top speed. some boot floor mods to get the exhaust out of the fashion, and and then some marry sheet.
That is a good idea. My 'Due south' has a full length battery box shield down one side of the centre exit and a shield for the twin electric fuel pumps down the other side.
It helps go along the DGS from the inside of the subframe webs which reduces rusting likewise, so it's 'win - win'.
#42
Posted 21 July 2014 - ten:53 PM
Dorsum in the 1970'south many Free Formula Special Saloon Mini racers cut out the kicking floor to salvage weight and then added an aluminium undertray under the rear subframe curved up to the rear panel. This also immune a small petrol tank to be fitted depression down inside the rear subframe. The exhaust on our racer passed through the undertray while some were diverted out sideways just in front of the rear wheel.......
This was my brothers 850 Special Saloon Mini racer below with a sheet aluminium undertray dorsum in 1973.
Edited by mab01uk, 21 July 2014 - 10:54 PM.
Source: https://www.theminiforum.co.uk/forums/topic/286478-mini-aerodynamics/page-3
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