craig87 Posted December 15, 2011 Report Share Posted December 15, 2011 Looks good Jamie and I'm actually understanding it!! Keep it up pal Link to comment Share on other sites More sharing options...
CW Racing Posted December 15, 2011 Author Report Share Posted December 15, 2011 I now have the wing with small end plates (we will call them Craig's end plates.) running at the moment. I have reduced the detail as it was taking 12 hours to solve each one. Link to comment Share on other sites More sharing options...
craig87 Posted December 16, 2011 Report Share Posted December 16, 2011 Haha cool look forward to the results mate Link to comment Share on other sites More sharing options...
CW Racing Posted December 16, 2011 Author Report Share Posted December 16, 2011 (edited) I just had time to look At the results of 'Craig's end plates' this morning. Looks to have split the difference on the downforce numbers but I will go through it maybe tonight. Numbers is about 460N so so ever the wing with no end plates it produces about 8.6% more down force with small end plates and 21% more downforce with the big ones on. Obviously this needs refining to suit the car to retain as much of this as possible. Edited December 16, 2011 by CW Racing Link to comment Share on other sites More sharing options...
CW Racing Posted December 16, 2011 Author Report Share Posted December 16, 2011 I keep chipping away at this as and when i get 5 mins to myself.. been reading back what i have said and to clear up one thing... im only measuring the forces that the wing elements them selves give... not the wing and the end plates together as we are looking at how adding things to the wing affects how the wing planes become better or worse at producing downforce and obviously try to quantify this with some numbers.. Link to comment Share on other sites More sharing options...
CW Racing Posted December 16, 2011 Author Report Share Posted December 16, 2011 So there are the pictures of craigs end plates Link to comment Share on other sites More sharing options...
CW Racing Posted December 16, 2011 Author Report Share Posted December 16, 2011 Link to comment Share on other sites More sharing options...
craig87 Posted December 16, 2011 Report Share Posted December 16, 2011 Very interesting how the smaller end plates create more drag than the larger! I'm going for the larger style ones then and will prob shape them much luck the ones you've modelled! Link to comment Share on other sites More sharing options...
CW Racing Posted December 16, 2011 Author Report Share Posted December 16, 2011 yeah im no sure whats going on there... could be a glitch in my simulation but there could be a reason also Link to comment Share on other sites More sharing options...
pestey Posted December 16, 2011 Report Share Posted December 16, 2011 maybe a strange request but could you do a mock up of a Gen7 with a vortex generator on the roof like on the EVO's, and with fins on the front bumper and the rear bumper diffuser. its been going through my head for months but am a bit scared of the possible draw backs if any. thanks for any possible help :xmas_cool: Link to comment Share on other sites More sharing options...
CW Racing Posted December 16, 2011 Author Report Share Posted December 16, 2011 I could have a look but I cannot do anything vehicle specific. Unless someone is going to pay me I cannot spend weeks modeling a specific vehicle. I can draw a generic saloon/coupe shape blob to do some studies with. Link to comment Share on other sites More sharing options...
CW Racing Posted December 18, 2011 Author Report Share Posted December 18, 2011 my next simulation is to remove the gurney flap from craigs wing assy... this will give an impression of how efficient the gurney is and if it is a good 'on the spot' mod to give some downforce at the track. Link to comment Share on other sites More sharing options...
CW Racing Posted December 18, 2011 Author Report Share Posted December 18, 2011 so with the 20mm tall gurney removed the downforce goes down to 320N and 43Ndrag... Ratio of 7.4 so even with the gurney removed you actually have an more efficient wing so less of the cars BHP is going into overcoming drag and is going into speed. so it has 32% less down force but has 53%less drag. Link to comment Share on other sites More sharing options...
mark165 Posted December 18, 2011 Report Share Posted December 18, 2011 Quick Ansys question if you don't mind? Not related to flow though.. Are the models a complete assembly? How are they fixed and what are the relationships between the support and the wing? i.e. have you modelled bolting etc? Cheers! Link to comment Share on other sites More sharing options...
CW Racing Posted December 18, 2011 Author Report Share Posted December 18, 2011 no the whole model is a single solid. im not measuring mechanical stress or strength so no need to do anything otherwise Link to comment Share on other sites More sharing options...
mark165 Posted December 18, 2011 Report Share Posted December 18, 2011 Ok no worries, just wondering how other people model welds, bolts etc. Link to comment Share on other sites More sharing options...
CW Racing Posted December 18, 2011 Author Report Share Posted December 18, 2011 if i wanted to see if the wing supports can sustain the loads placed on them by the wings downforce and drag then yes i would have to bare this in mind. im feeling a bit of FEA coming up next lol Link to comment Share on other sites More sharing options...
mark165 Posted December 18, 2011 Report Share Posted December 18, 2011 Of course, I'm not criticising. Ansys has a number of different options as to how things are fixed together for simulations, I'm yet to find a standardised way that people approach it. I was just curious to see if you'd looked at it and had any thoughts. Just for interest really. Link to comment Share on other sites More sharing options...
CW Racing Posted December 18, 2011 Author Report Share Posted December 18, 2011 yes i do but have my own ways but you dont need to fix anything for this sort of simulation... its just an object in space with air blowing over it. i wasnt using ansys for this wing study eitherway. Link to comment Share on other sites More sharing options...
CW Racing Posted December 20, 2011 Author Report Share Posted December 20, 2011 so with the 20mm tall gurney removed the downforce goes down to 320N and 43Ndrag... Ratio of 7.4 so even with the gurney removed you actually have an more efficient wing so less of the cars BHP is going into overcoming drag and is going into speed. so it has 32% less down force but has 53%less drag. so here are the screen shots from the wing with no gurney to have something to compare to Link to comment Share on other sites More sharing options...
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