[Other] BladeGen data import wizard leading to nonsmooth blade surfaces

jgross · November 13, 2019, 12:21

Hi all,

I have been given a CAD file of a pump impeller which I would like to import into BladeGen (please see link 1 and 2 for images). However, when using the data import wizard I get unwanted nonsmooth blade surfaces near the trailing edge (please see link 3 and 4 for images).

I believe this is due to the "Select Tangency Points" step of the data import wizard completely messing up the trailing edge definition (please see link 5 and 6 for images).

Please find images at the following links (the insert image option isn't working for me):
https://imgur.com/EuvQ2pY
https://imgur.com/CMy2iv6
https://imgur.com/qbqnsI9
https://imgur.com/VopCa9O
https://imgur.com/L3lsMPi
https://imgur.com/g425ZZg

I have spent days on trying to fix this. I have read the relevant tutorials (the few that exists) regarding using the data import wizard. I have also searched on Google and the forum for relevant posts, but nothing seems to be much help.

If anyone is able to answer any of the following three questions, I would be eternally grateful.

1) Have you managed to successfully use the data import wizard? If so, could you please provide advice on how to get a smooth blade surface?

2) Do you have any advice for importing the geometry into BladeGen so that I can modify the design parameters to create new geometries?

3) Alternatively, do you know of any other methods of extracting the design intent of the blade so that I may parameterise the geometry for subsequent optimisation?

Thank you in advance for any help you can provide!

James

jgross · November 15, 2019, 11:50

From the lack of responses, I suppose the data import wizard is not an often used feature...

jgross · October 19, 2020, 06:20

It has been a year since my original post. However, there has been no resolution for this issue, so as a last attempt, I thought I would refresh this post.

I have referred extensively to User Guide, but the data import wizard feature is poorly explained there. I have also posted in the Ansys Learning Forum (https://forum.ansys.com/discussion/1...blade-surfaces)

From my understanding, it seems the main issue is that BladeGen uses the same thickness distribution for both the pressure and suction surfaces, whereas this impeller has different thickness distributions for each side.

November 13, 2019, 12:21	BladeGen data import wizard leading to nonsmooth blade surfaces	#1
jgross Member James Gross Join Date: Nov 2017 Posts: 77 Rep Power: 8	Hi all, I have been given a CAD file of a pump impeller which I would like to import into BladeGen (please see link 1 and 2 for images). However, when using the data import wizard I get unwanted nonsmooth blade surfaces near the trailing edge (please see link 3 and 4 for images). I believe this is due to the "Select Tangency Points" step of the data import wizard completely messing up the trailing edge definition (please see link 5 and 6 for images). Please find images at the following links (the insert image option isn't working for me): https://imgur.com/EuvQ2pY https://imgur.com/CMy2iv6 https://imgur.com/qbqnsI9 https://imgur.com/VopCa9O https://imgur.com/L3lsMPi https://imgur.com/g425ZZg I have spent days on trying to fix this. I have read the relevant tutorials (the few that exists) regarding using the data import wizard. I have also searched on Google and the forum for relevant posts, but nothing seems to be much help. If anyone is able to answer any of the following three questions, I would be eternally grateful. 1) Have you managed to successfully use the data import wizard? If so, could you please provide advice on how to get a smooth blade surface? 2) Do you have any advice for importing the geometry into BladeGen so that I can modify the design parameters to create new geometries? 3) Alternatively, do you know of any other methods of extracting the design intent of the blade so that I may parameterise the geometry for subsequent optimisation? Thank you in advance for any help you can provide! James

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November 15, 2019, 11:50		#2
jgross Member James Gross Join Date: Nov 2017 Posts: 77 Rep Power: 8	From the lack of responses, I suppose the data import wizard is not an often used feature...

October 19, 2020, 06:20		#3
jgross Member James Gross Join Date: Nov 2017 Posts: 77 Rep Power: 8	It has been a year since my original post. However, there has been no resolution for this issue, so as a last attempt, I thought I would refresh this post. I have referred extensively to User Guide, but the data import wizard feature is poorly explained there. I have also posted in the Ansys Learning Forum (https://forum.ansys.com/discussion/1...blade-surfaces) From my understanding, it seems the main issue is that BladeGen uses the same thickness distribution for both the pressure and suction surfaces, whereas this impeller has different thickness distributions for each side.