Best way to model this turbine blade.
Greetings, this is a little problem i came a cross few months back, at the end the blade was scanned. But I'm sure there is a way to model this blade better, and more correctly , i have attached two files ,my Alibre model and one and only drawing of blade profiles. I would like to see the steps & methodology of modeling this blade better as I'm sure there is a way - to do it. ps. there is no mathematical information about the blade profile just THIS drawing and another containing the same info that is in the model.
5 Answers
Problem is that there are no additional drawings except this file i give you & additional dimensions were from hand drawn sketch that i lost...as it was sent for scanning to other firm :/ so there are more to this problem then just modeling there is the "search" for appropriate aero profiles and mathematical & exact dimensions. But i would like to see how would one start to model this in the Design Explorer with the steps of modeling. So I and anybody else for that matter that needs to model the blade has some good starting reference.
This is look like a aksial fan blade. Make minimum 5 planes, make profiles, make 5 cylndrical surfaces. Each of profile section project to correspondent clyndrical surface. You'll get a true profile - this is theory of wings - study aeroprofiles. then loft thru these profiles. Of course, top of blade require a playing and a leg of blade is also require a playing - this is designing.
Hm.the part of cylindrical surfaces is fuzzy to me- but the main problem is that there is no mathematical or empirical information of the blade just the 2 drawings (im sadly missing now one but all informations are put in the Alibre file (thread and holder dimensioning) and hight... I ask this question to help others get idea how to model this fairly complex model,and hopefully interest someone to model it again just to help and improve others understanding in complex modeling.... )
Too bad I just started Grabcad or I would have answered earlier. I wasn't able to download the model but from the image I can tell you how I would do it. Start a new model and put the 2 profiles on the proper planes and loft a boss with the two profiles. I'd use exactly 4 b-splines for each profile, make sure they're connected, analyze the sketch. I'd like to see what you have if there's a way to send it to me.
The simplest way is to import the image file into an Alibre drawing and trace over it using the spline tool then copy and paste into a sketch. If your image file is correct in terms of ratio and proportion then you can scale it to any size you want after you have created the sketch.
