WING DESIGNING AND ANALYSIS
Hi friends i hope you all liked the analysis part and also tried out various other airfoil designs available in the airfoil database site. This analysis helps us in understanding the basic concepts and also the theory behind the lift generation and the selection of these kind of airfoils.
Coming to the topic, today we'l learn how to design the wing by using various airfoils. As we all already know that "An airfoil is the perpendicular cross section of wing, which has a complex shape of various curves along its design".
Now let's get started with the designing part.
DESIGNING
1. Go to ------> ( http://aerospace.illinois.edu/m-selig/ads/coord_database.html) and go through the various types of airfoils some of which you might haven't heard of.
2. Select the type of airfoil you require to experiment upon and download the ".dat file".
3. Open XFLR5 ---------> Choose the FILE option in the toolbar and open "Direct Foil Design" or you may also simply type "CLT + 1".
4. Choose the OPEN option on the toolbar and open the .dat file downloaded.
5. Open "Wing and Plane Design" from file on toolbar or type "CLT + 6".
You can see a 3D space being created for the designing part.
6. Choose "Design a new wing" from the toolbar or click "F3".
A new dialog bow will pop up showing a flat wing which is symmetric along X-axis. On the right hand side you can select all the options like panels, Mass, foil names.
7. We have got two sections in our wing in the above table we have two columns with various parameters two modify our wing.
8. You can edit the values of span, chord length, according to your eye catching design of the wing.
9. To generate the airfoil click over the empty space below the foil and we get the airfoil which you have worked upon previously or open in the starting.
You can zoom in to find that you have got a wing with the specified airfoil curves on the sides.
10. Click on "Insert after section 2" and increase the length by your own values and then choose dihidral and give in a value to make the winglets. The angle of dihidral can be of your choice.
11. Next we need to setup a POLAR to run the final analysis over wing designed.
12. Click on POLAR in toolbar and choose "Define an Analysis" and we get a new dialog box in which we have three options
a) Fixed Speed
b) Fixed lift
c) Fixed area
13. We are selecting FIXED LIFT over the given wing, take your own maa of the plane and choose VLM and deselect viscous. Then clcik OK, in the RHS select the sequence and give your angle of attack values and click on ANALYZE.
HENCE YOU CAN SEE A BRILLIANT FIGURE OF FORCES WHICH ACT OVER A WING WHEN IN FLIGHT.
YOU CAN ALSO SELECT PANEL FORCES AND GET A DIFFERENT SET OF VIEW OF FORCE LINES
Thank you for patience and please practice this over various airfoils available out there.
Want to analyse a stand-alone wing but unable to find the option "Design a new wing" under "Wing and Plane Design" in the recent version XFLR5 (v.6.43 ). Has it been removed ?
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