Hey i reallo love your videos but when i created my blade design and added more sections. I optimized the blade and it got very thin, also the twist angles are almost all at negative degrees for example -13deg. which makes my wind turbine generate -kW any way can fix this, or is this because i messed up somewhere when following your tutorial i used a naca 6322 airfoil, thanks for the answer
in my software the chord is showing like (m) but in yours it is in (mm) so i also want my chord size to be in (mm) so what to do in that case ? please reply sir as this my urgent project sir .
Hello Todd, thanks a lot for this video, just a question do you have any video about importing STLfile from q blade into the Ansys fluent or any helpful information
I talk about that a bit in the previous video in the series. ruclips.net/video/F04CnPRHupg/видео.html In simple terms, these show the change in lift coefficient (Cl), drag coefficient (Cd) and pitching moment (Cm) with angle of attack (alpha). There is also a graph of lift coefficient (Cl) against drag coefficient (Cd) which gives the theoretical glide angle of the airfoil, and is the classical "polar" plot for an airfoil. Basically, the polar gives a graphical representation of the behavior of an airfoil with angle of attack. Looking at polar plots allows you to compare airfoils against each other. The designer has to use engineering judgement to decide which airfoil section is best suited for their particular application.
Hey Todd, will you be using Solidworks to use the data. Also, is it possible to make a design that has the same airfoils as an actual 3MW-2MW wind turbine?
I'm using PTC CREO to work with the solid models, but you could certainly use Solidworks if that's what you have available. You definitely could import different airfoils. You just have to know what they are and where they are located along the blade. There are other videos out there explaining how to import different airfoil shapes. If you can't follow them, let me know and I can make one, too.
Hello, how long should be mine chords? First and last. How to calculate them? I need wind turbine for 4m/s speed and 25 cm radius. Its for turbine contest.
Hi please am a final year student in the university and am doing project on design and optimization of wind turbine blade . So please I need your support and assistance
The optimization is based on tip speed ratio. So, you select a wind speed, select the desired RPM at that windspeed, convert the RPM to tangential speed of the tip, and input that ratio into the optimizer. Some tip speed ratios are best for pulling the maximum power from the wind field. Other videos explain why. Then you use a gearbox to convert the optimum rotorspeed, from aero optimization, to the RPM at which your generator is most efficient. The trick is that due to the gearing, starting the rotor may be difficult. So it may be necessary to use a variable speed transmission to get the rotor up to speed, or just run the generator at a nonoptimal speed.
It's a property of the airfoil section. You can use just about any CAD package to find the centroid of an airfoil section. I used CREO to calculate the center of mass of a unit length uniform airfoil, which gave the centroid of this particular section as 42% of the chord. Note that you might want a different chord for your twist axis, depending on your design intent. In my case, I wanted to minimize cyclic moment loading about the twist axis from the mass of the blade.
Exactly what I was looking for! Thank you for your video
Hello Todd! These videos are very helpful! I will use the knowledge for my capstone project. Thanks a lot :)
Glad to help!
thanks todd, this is very helpful
Great video, thnx, looking further, hopefully there is CAD and printing part covered...
Yep.
Hey i reallo love your videos but when i created my blade design and added more sections. I optimized the blade and it got very thin, also the twist angles are almost all at negative degrees for example -13deg. which makes my wind turbine generate -kW any way can fix this, or is this because i messed up somewhere when following your tutorial i used a naca 6322 airfoil, thanks for the answer
Hello Todd , thanks a lot for this video ,just a question :how do you know the values of position chord and twist angle ?
in my software the chord is showing like (m) but in yours it is in (mm) so i also want my chord size to be in (mm) so what to do in that case ? please reply sir as this my urgent project sir .
Hello Todd, thanks a lot for this video, just a question do you have any video about importing STLfile from q blade into the Ansys fluent or any helpful information
Sorry. I'm not an ansys user, so I can't be of help.
Now that you have created the polar. What is the polar, and how should that be understood ?
I talk about that a bit in the previous video in the series. ruclips.net/video/F04CnPRHupg/видео.html In simple terms, these show the change in lift coefficient (Cl), drag coefficient (Cd) and pitching moment (Cm) with angle of attack (alpha). There is also a graph of lift coefficient (Cl) against drag coefficient (Cd) which gives the theoretical glide angle of the airfoil, and is the classical "polar" plot for an airfoil. Basically, the polar gives a graphical representation of the behavior of an airfoil with angle of attack. Looking at polar plots allows you to compare airfoils against each other. The designer has to use engineering judgement to decide which airfoil section is best suited for their particular application.
Hey Todd, will you be using Solidworks to use the data. Also, is it possible to make a design that has the same airfoils as an actual 3MW-2MW wind turbine?
I'm using PTC CREO to work with the solid models, but you could certainly use Solidworks if that's what you have available. You definitely could import different airfoils. You just have to know what they are and where they are located along the blade. There are other videos out there explaining how to import different airfoil shapes. If you can't follow them, let me know and I can make one, too.
Hello, how long should be mine chords? First and last. How to calculate them? I need wind turbine for 4m/s speed and 25 cm radius. Its for turbine contest.
Is it possible to change Pos (m) to Pos (mm) in the Blade Design section?
I don't think so. This is actually a big problem when trying to design small scale blades. The resolution is pretty limited.
Hi please am a final year student in the university and am doing project on design and optimization of wind turbine blade .
So please I need your support and assistance
How do I define the wind speed I want to optimize it for?
The optimization is based on tip speed ratio. So, you select a wind speed, select the desired RPM at that windspeed, convert the RPM to tangential speed of the tip, and input that ratio into the optimizer. Some tip speed ratios are best for pulling the maximum power from the wind field. Other videos explain why. Then you use a gearbox to convert the optimum rotorspeed, from aero optimization, to the RPM at which your generator is most efficient. The trick is that due to the gearing, starting the rotor may be difficult. So it may be necessary to use a variable speed transmission to get the rotor up to speed, or just run the generator at a nonoptimal speed.
@@kyakfsh Thank you very much!
Hi, How do u calculate the twist pt as 42%?
It's a property of the airfoil section. You can use just about any CAD package to find the centroid of an airfoil section. I used CREO to calculate the center of mass of a unit length uniform airfoil, which gave the centroid of this particular section as 42% of the chord. Note that you might want a different chord for your twist axis, depending on your design intent. In my case, I wanted to minimize cyclic moment loading about the twist axis from the mass of the blade.