Ansys Fluent: Power And Torque Calculations On A Simple Turbine
HTML-код
- Опубликовано: 20 авг 2024
- This video shows how to simulate the air flow around a three blade savonius turbine using the dynamic mesh tool on Ansys Fluent. Also, the data of the simulation is exported as a text file, using these some relevant quantities, such as the force on the turbine, its torque, angular speed, power, etc, can be calculated and plotted.
The calculation of the angular velocity may need some explaining. Given that on the turbine wall the velocity of the fluid is the exact same as the velocity of said wall(because of the non slip condition), the maximum velocity on the turbine is calculated as "max_vel" as shown in the video. That maximum velocity happens on the point of the turbine wall that is the farthest from the center of rotation, which is at a distance of 0.25[m], which you can measure from the geometry. After that, you have Vel_max = omega R, then omega = Vel_max/R and finally omega = Vel_max/0.25[m]. Which is the expressión used for the angular velocity.
#Ansys #AnsysFluent #CFD # AutoDesk Inventor.
I FREAKING LOVE THE MUSIC U USED!! DAMN HAD ME JAMMING WHILE WATCHING THE WHOLE TIME
6:00 named selections
12:42 moment_z calculation
13:02 drag and lift calcultions
Thanks a lot for the new tutorial. Your tutorials are helping me a lot.
For the past few days, I am trying to simulate the motion and residence of solid particles (mean dia = 0.1 mm, density 200 kg/m3) around a spherical bubble in a cylinder (2D planar, vertical). Water flows from the inlet (velocity =1m/s) with outlet maintained at pressure outlet. Solid particles should be injected from the inlet side. I have used the DPM model and run the case for 5 secs. But I am finding it difficult to get the result. If you could make a tutorial on this, it would be a great help for me. Thanks.
I'll keep it in mind, but given time restrictions I can't make any promises.
Hello sir, I'm one of your RUclips followers. I'm currently facing an issue in running a simulation of a Savonius wind turbine. I'm working on my thesis which needs to be completed, and I'm struggling to meet the demands of my thesis supervisor who requires obtaining RPM directly from Ansys simulation. The variables I'm using include wind speed variations from 1m/s to 7m/s. If you would be willing to create a tutorial video, I would be extremely grateful to you.
Hello @bastian2497,
I am doing my thesis on the same topic where I need to run simulations on Savonius, Darrieus and hybrid type turbine. I'll be happy to connect with you to discuss.
Hello! How did you define 0.25 m/s in Omega (rad/s)? How did you define moment of inertia?
Power units in W or in kW ?? Because 1.5W don’t make any sense for the turbine ?
Hi, thanks for the great video! Could you possible make a savonius simulation inside a pipe? and derive power graphs and power coefficient graphs with RPM? That would be a huge help. There is a gap in existing videos! And it is very important for me and other people I guess. It would be really life saving and a good addition for this amazing channel
Sir could you please help me to plot Cp vs TSR graph
Hello, at 12:32 you already have 3 definitions. Can you please tell me what did you chose in these sections? And I guess you defined max velocity in it, that's why I'm getting only zeros in plots
Sir, can you help us how to plot power coefficient and TSR values?
hi,you can calculate average cm and with tsr plot cp against tsr
@@alirezabidelkhoshbakht60sir , care to giude?
Did you get the answer ? @kayerellebarrete4324
Have you already got the answer? :') I have a trouble with it
I have followed all the steps correctly,but during calculation dynamic meshing failed due to negative cell volume detected
Thank u veryyyyyyyyy much sir for the great video
But i have one question
In cant find the contact-region-src and contact-region-trg
And i don't know where i mistake🤔
I design the geometry in solidworks
Can you please help me to solve the problem?🙏🙏🙏🙏🙏🙏🙏🌹
did you solve this?
I had the same problem, and fixed it when selecting an analysis type 2D in the geometry properties. 3:52. For geometries exported from Solidworks, you need to translate the geometry to the XY plane in DesignModeler.
Very good video sir, How to plot Power coefficient VS tip speed ratio sir?
Plug-In error.No valid bodies founf for 2D analysis.
This error is popping up for boththe surfaces those are extracted from the parts.Can you kindly tell me how to fix it
How would you plot the Power coefficient against the Tip speed ratio? Is there a way to gather TSR results from Ansys?
The video is really helpful to me. I wonder why you give 0.015 to the moment of Inertia. Is it just abitrary value or calculated value?
Thanx
sir can you do the same calculation for 2 blade savonius turbine?
hi, thank you for the tutorial.
I am following this procedure exactly. The only difference is that i am using a multibladed turbine.
I follow the steps as it is but for some reason i get zero force and moment values. i am just using K-omega sst model and my velocity is a constant (5.5m/s). All else is same. I am not sure why i get zero values for force plot and moment. I want to calculate rpm and power.
That's very strange. Is the turbine still accelerating normally? And are you sure you are calculating the force and moment on only the turbine wall?
@@fluentsetup1232 yes the turbine does rotate and rotates fast.....and yes i calculate the force on the turbine wall....can you please give me your contact? i would like to share my case files and images as well as the animation....may be you can have a look....thank you!
@@muhammadtayyab6280 Sorry for the late response. it seems I'm not getting notification for some messages. Give me your e-mail and I'll contact you.
@@fluentsetup1232 sir, can you help us sir in getting the power coefficient and tip speed ratio?
Good day sirs, have you found the solution for that particular issue where we obtained the moment and force approaching zero. The angular velocity seems fine as it increases from zero and finally stable. As it happens, moment, on the other hand, keep decreasing from the maximum value to around zero which made me confuse. Would u mind to share the tips or myabe a contact so that i can complete my research sirs? Thanks in advance
how can you solve the torque with the given data?
Hello, I am doing analysis on Archimedes wind turbine in ansys fluent here my problem is torque is increasing continuously with speed of turbine. Can you help me.
How to plot Cp Vs TSR curve?
Very good video sr but the music is so annoying
i have defined 60 time steps and in animation from zero to 60 is directly coming no middle time steps
Hi sir, your video help me a lot, thanks for that! Also I would like to ask, do you have any reference for the use of maximum velocity fo obtain omega? This means that the maximum velocity is the same as tangencial velocity? I trying to undestand the formula you use. Hope you can help me, thank you again!
Hai Sir,
May I know, at 6 DOF, how to finalise those moment inertia value?
Hello sir i am trying to create my project same as your but i am facing negative cell volume error what should i do for that??
Solve hua bhai ye problem??
What was your project bro
why you used the expression for speed?
I usually like to increase the speed gradually from 0 to a predetermined value and i need an expression for that (or a UDF). Otherwise the velocity jumps from 0 to a higher value in a very small time step and that's not realistic and it looks weird when you do the animation.
Sir, how can I increase power?
Sir, this project are you publish in journal?
Hi sir, nice video.
I need some help.
First, i want to input inlet volumetric flow around 1.6 m3/s to run my pelton turbin simulation. Why the unit in inlet velocity magnitude is "m/s"?
Is it possible to convert "m3/s" to "m/s"?
What should i do if you cant convert "m3s" to "m/s"?
Thanks.
calculate it manually
Vol Flow Rate = Area of the turbine X Velocity
Hi can i get the data ?
Hi, very good video. I have an issue, if you coul help me: I've done a simulation of a turbine using this exact method, but when I plot the velocity contour there are always discontinuities between both domains (fixed and rotational) at the interface. How can I fix that? In 20:37 I see you don't have such discontinuities on the plot. I used sliding mesh and not dynamic mesh btw.
You can try to keep the size of mesh near the interface to be almost similar to avoid this error.
13.02
What's the name of the song??
14.04 why did u divide v max with 0.25? Is 0.25m the radius of your turbine? Are u following v=r omeega relationship? Kindly reply please
It's in the description of the video, but is essentially what you just said.
hi i am facing issues in the animation part
can anyone help me with that?
yes i can whats the issue?
@@hamzawajid7616 I'm getting only zeros in plots, I did the same things in the video but we didn't define max velocity. Can you help me how to fix it
you didnt define refence values ,,how u calculated force and moments....
A default length value is used. I believe ansys use L = 1[m], which seems reasonable given the other dimensiones of the problem.
is calculating torque and power the same with 3d models?
Its pretty much the same, I hace some new videos on 3d turbines that may help you, but the torque and power calculation its the same
@@fluentsetup1232 Thank you so much your videos are such a great help for my thesis. However, I'm having a hard time, if possible can we talk in private message? willing to pay. Again thank you!
how to find moment of inertia?