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It seem like I will not find 3D flow simulators help here, but what can be a first ''accessible'' book to read about vehicle aerodynamic?
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As you say, the perfect is the enemy of the good.
If you were asking about help with CFD, that wasn't clear. There are threads here on the subject, and a Search field in upper left. If you want to read books, then search for
Julian Edgar.
ecomodder.com/forum/showthread.php/new-amateur-aerodynamics-book
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New amateur aerodynamics book
Hello everyone - I have been given permission by the webmaster to spruik* my new book.
It's called the Amateur Car Aerodynamics Sourcebook.
Amazon have it on opening special at the moment - see Amazon.com: Amateur Car Aerodynamics Sourcebook: For everyone interested in road car aerodynamics (9781482735253): Julian Edgar: Books
The blurb says:
At last – a book for those who like to modify the aerodynamics of their road cars!
In this book author Julian Edgar explores a host of practical and low-cost techniques that you can do yourself without spending a lot of money or needing special facilities.
Section 1 introduces aerodynamic drag and lift. The language is simple and straightforward – but still includes concepts such as drag co-efficients, lift co-efficients and the different types of drag that affect road cars.
Section 2 is devoted to aerodynamic testing – directly measuring aerodynamic pressures, and seeing airflow patterns by the use of on-road wool-tuft testing.
Section 3, the largest part in the book, covers aerodynamic modification. Fitting vortex generators, testing different undertrays, reducing drag, using turning vanes in intercooler ducting – all are covered in detail. In addition, techniques are described for reducing wind noise, building an effective engine intake that breathes high-pressure cold air, siting bonnet vents in the correct location, and testing airflow through intercoolers.
With nearly 300 full-colour photos and diagrams, this book is practical and down to earth – and uses techniques able to be carried out on the road.
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Else you could just take the profile you've drawn, maximize the tumblehome and radius the edge to 3-4" and be done.
*I have no idea what spruik means.