- TL;DR Summary
- I need help from others here regarding designing a turbine blade.
Is that 4 cm width or depth? Is it the chord length of the blades 4 cm?The gap between two rings for my design is 3 cm and the width of the turbine would be 4 cm.
Wow. That is a particularly difficult problem in computational fluid dynamics. Maybe someone can recommend a book, or a public domain software package. Be prepared to spend lots of time and effort to compute the answer.But I want to use the best design of the blades that will give me highest output out of this airflow. Can anybody tell me how to design blades (like as shown in the photo) so that the design can be fed to a 3D printer.
This is not a stator but rather a turbine. I have mentioned it at the start. Can't understand why a dome and cone is needed to keep the flow clean.Is this a turbine that rotates, or a stator in a duct? There will need to be a dome on the upstream side and a cone downstream, to keep the flow clean. The turbine does not exist in isolation.
I hope there is an optimum design and data for a model airplane wing, with similar scale, profile and airspeed.Wow. That is a particularly difficult problem in computational fluid dynamics.
Look at the compressor at the front of a jet engine. There is a dome that keeps the flow entering the compressor clean. The blades will work efficiently only if there is laminar flow over the blade airfoil.Can't understand why a dome and cone is needed to keep the flow clean.
If you want higher rpm you get lower torque and vice versa. This should be optimized for what is being driven.You will also need to specify turbine RPM when airflow is 65-70 m/s velocity.
You could probably send that to someone and just say you want that shape 3cm long and extruded 3cm high and get something you can use.View attachment 263002
Just found this design from the link. But not sure whether any 3d printing company can make what I want to from this design or not. Kindly help!
Google turns up lots of hits for on demand 3d printing. Research, pick one and talk to them.To whom? I don't know such an expert for now.
Most probably just want a CAD file. Do you have access to CAD software (there are free/open source ones...)? Get it, draw what you want them to make, and send it to them.I have already searched it. But 3D printers require further details. Like the frontal angles, tip angle, curveture radius etc.
i just want to know a few little things. The necessary data so that I can make it from a 3D printer and the name of this type of wings. Nothing else!Honestly, I don't see/understand the problem here. People do this kind of thing all the time.
This is the sort of thing one might do a master's thesis on. It isn't easy or quick (I know you are just pointing out the variables...). My advice for the OP is to start by just making *something* that works, as a starting point. Right now the path seems likely to yield nothing but analysis-paralysis, but if he just *does it*, he'll at least end up with a functional turbine. If he sets that criteria as a goal, it's pretty much impossible to fail.But how close this will come to "best design" for your application is guesswork without the detailed calculation. Designs like that don't scale well in size or air velocity. It is up to you decide how confident you need to be that what you have is "best."
Even the number of vanes is not guaranteed to be best. Your picture shows 9.
Those thick high-camber airfoils had the highest lift, but also had very high drag. They were the German style from Gottingen University 100 years ago. The thickness gave more rigidity for early monoplane wings, but greatly reduced the maximum airspeed.Just found this design from the link. But not sure whether any 3d printing company can make what I want to from this design or not. Kindly help!
Do you understand any of it? Those are just geometric properties picked-off of/interpreted from figure 137.I have chosen one. Kindly see the attached file. It's a high camber more lift type of wing used long ago in low speed aircrafts. Whatsoever, I need just one more help. I can't understand the table 177 given in the attached file. Need help to understand it.
They are expressed in % of chord and you can read them straight off the graph: 5.9% is 0.059 on the graph. And the X-coordinate is given at 0.21. In other words, if the chord length is 100 cm, the maximum thickness is 5.9 cm.Some, not all. Especially those at the top i.e. Maximum Thickness and Maximum Camber part. Rest is more or less clear.
This will be placed inside a duct. And, by the way, can anybody tell me the "critical angle of attack" and the lift to drag ratio for that speicific angle for such a wing type?Is this going to be placed inside a duct, or is it going to be in free airflow? Basically, is the flow constrained to go through the turbine, or can it also flow around it? That will significantly change the design considerations here.
Blades are 35.5° relative to the incoming wind, I assume?Summary:: I need help from others here regarding designing a turbine blade.
For this model maybe, but that's not exactly what I want to made. The blade angle is different for my case.Blades are 35.5° relative to the incoming wind, I assume?
The velocity is around 66.5 m/s.OK. What are the flow conditions in the duct? Is there a significant pressure ratio from the inlet to the outlet? What kind of flow velocity are you expecting?