thanks for your good tutorial but are you sure about 15 m/s for inlet Boundary condition? i think velocity in the inlet in this case is depend on your propeller shape and coefficient and is a output of the problem and not a specified input. and you should use another BC for inlet.
@@UnfinishedEngineer I found out how it is. you are using pitch of the propeller means how much it travels so you have the rpm that you desire to calculate. [rpm*pitch(inches)]/[60 seconds*100]
Thank you for tutorial it helped me alot but I am not getting the expected result contour pressure of my propeller is completely opposite low pressure under blade and high pressure above blade. Can you please help me.
In mesh interface, I also have "propeller-contact-region-src" I followed your steps but I dont know why this appeared. Could you please tell me, how can I solve?
I have a question in fluent, did you set the "propeller" as Stationary Wall or as Moving Wall? Besides, would you know why when I see the streamlines in the cfd-post I don't see lines behind the Rotating Body? It could be due to a small Static Domain or Rotating Domain? It's strange because the thrust has a logical value... Thanks!!!
hey antonio, im also currently having this problem. My streamlines hit the top of the rotating domain and then stop, they then exit at the bottom of the rotating domain but I am not seeing any streamlines inside the rotating domain. Did you find a solution for this? Cheers
The speed of advance is too high for the RPM of the propeller. Thrust comes from the fluid mass acceleration through the propeller disk. If the inlet velocity is too high, the blades are unable to increase fluid speed. Thats all a matter of a wrong design for the choosen conditions. Thrust can be increased in a several ways, the most obvious being increasing RPMs. But don't forget that linear blade tips speed must always stay below the speed of sound.
Do you know how can we get the drag force. I am trying use the same way to get the thrust force, and also caculate the drag fore with the force report, Drag. But these two force are totally same? DO you know How to get the correct drag force?
When calculating Thust force, the result is the NET force induced by the propeller, hence drag is already taken into account. From my point of view, an important value that's always omited in all of those tutorials is the propeller Torque. Torque is a main design requirement as the motor/engine selection will directly depend on it.
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You guys help us become better engineer
thanks for your good tutorial
but are you sure about 15 m/s for inlet Boundary condition?
i think velocity in the inlet in this case is depend on your propeller shape and coefficient and is a output of the problem and not a specified input. and you should use another BC for inlet.
yes, I am confused too. but in the result it seems like zero
I think he knew in advance the advance ratio data at a certain rpm.
@@xxroco0418xx same question here!!..when you have RPM why inlet velocity.. and how to find that inlet velocity with testing physically
hello. First of all thank you about great video . Why, when I open the results section, the propeller is seen as broken ?!!
Thanks for interesting tutorial... I have an question, why do you put inlet velocity(15m/s)? not just set it pressure outlet?
same question here!!..when you have RPM why inlet velocity.. and how to find that inlet velocity with testing physically
@@UnfinishedEngineer I found out how it is. you are using pitch of the propeller means how much it travels so you have the rpm that you desire to calculate. [rpm*pitch(inches)]/[60 seconds*100]
What equations should I use to compare the results with the results of the program?
Thank you very much, hello from vietnam
u are welcome
Hello, nice tutorial! Please can you explain about the rotational speed, is it rotating clockwise or counterclockwise from the arrow of the Y-axis?
cw or ccw is obvious by looking at the blade
hey what is dimensons of your propeller???
imean the diamater and chord?
Thank you for the help.
Thank you for tutorial it helped me alot but I am not getting the expected result contour pressure of my propeller is completely opposite low pressure under blade and high pressure above blade. Can you please help me.
Are you rotating it in the right direction?
@@christianlabanca5377 can I get your mail id plz :). ?
@@abhilashm6711 Yeah sure. It's clabanca7@gmail.com
If you have any questions we can try and solve them
the rotating direction is not correct
In mesh interface, I also have "propeller-contact-region-src" I followed your steps but I dont know why this appeared. Could you please tell me, how can I solve?
How i get torque? Besides, that Force value is straightaway in Newtons ?
Multiply the force with radii
Hi there, where did you get the propeller CAD? Thank you
My mesh propeller mesh looks bad what should i do
What's app ur using for it
Thanks a Looot the videos helped!!!
I have a question in fluent, did you set the "propeller" as Stationary Wall or as Moving Wall?
Besides, would you know why when I see the streamlines in the cfd-post I don't see lines behind the Rotating Body? It could be due to a small Static Domain or Rotating Domain? It's strange because the thrust has a logical value...
Thanks!!!
hey antonio, im also currently having this problem. My streamlines hit the top of the rotating domain and then stop, they then exit at the bottom of the rotating domain but I am not seeing any streamlines inside the rotating domain. Did you find a solution for this? Cheers
@@samdougherty5559 same problem here, still trying to find a solution!
@@samdougherty5559 i think your velocity direction is not correct
Hello can you tell me what is that error that you are getting when you begin calculation "mesh interface overlaps for interface zone"
Your meshing isn't proper
How to do acoustic analysis of propeller?
Please guide me about sump model analysis
wich software use with version name plz
i use ansys 2018. no option for force. only drag, lift and moment
Why is the thrust so low? Isn't it normally in the range of 500-600 N for a regular drone blade?
The speed of advance is too high for the RPM of the propeller. Thrust comes from the fluid mass acceleration through the propeller disk. If the inlet velocity is too high, the blades are unable to increase fluid speed. Thats all a matter of a wrong design for the choosen conditions. Thrust can be increased in a several ways, the most obvious being increasing RPMs. But don't forget that linear blade tips speed must always stay below the speed of sound.
Where did he shown the thrust man?gimme the timestamp
Do you know how can we get the drag force. I am trying use the same way to get the thrust force, and also caculate the drag fore with the force report, Drag. But these two force are totally same? DO you know How to get the correct drag force?
When calculating Thust force, the result is the NET force induced by the propeller, hence drag is already taken into account. From my point of view, an important value that's always omited in all of those tutorials is the propeller Torque. Torque is a main design requirement as the motor/engine selection will directly depend on it.
i get the" run cannot be started until validation issues are resolved " error in the calculation stage, what should i do ?
Same here
0:44 why is gravity in y direction???? shouldnt it be in x or z direction?!
This seems to be a drone propeller, so gravity works along he rotational axis.
merci beacoup
when simulating a drone, is it necessary to simulate all rotors in the same domain or they can be in separated simulations?
thanks
you can simulate just one and use periodic boundaries.
thanks
Bom Sucesso maun
Why the thrust just 50n ?
the same i ask
Inlet speed too high for that propeller design.
I think the propeller he used is in the range 12-20 inches and for that kind of propeller this thrust (5kg) is justified