How to Calculate Thrust Force on a Rotating Propeller Blade Using CFD ANSYS (Fluent) 19.1|| part 2

This tutorial is a continuation from the tutorial part 1, here just shows the setup step and the running process until find out the thrust force result and how the model of air flow through the rotating propeller is look like......
Paart 1 : • How to Calculate Thrus...

[@abhinavKumar118]

You guys help us become better engineer

[@kdavis2686]

Thank you for the help.

[@Bhanuprakash-xl6ti]

Thanks a Looot the videos helped!!!

[@alexanderteplyaxins7544]

Thank you very much, hello from vietnam

[@arjenalves2204]

u are welcome

[@meddimarcy]

Hi there, where did you get the propeller CAD? Thank you

[@thatsound7057]

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?

[@Swamic2]

How to do acoustic analysis of propeller?

[@adamalfakhri2300]

Hello, nice tutorial! Please can you explain about the rotational speed, is it rotating clockwise or counterclockwise from the arrow of the Y-axis?

[@meddimarcy]

cw or ccw is obvious by looking at the blade

[@pratibhakanere2270]

Please guide me about sump model analysis

[@CADDNAS]

thanks

[@jennifersequeira6946]

Bom Sucesso maun

[@jonathanarias2729]

when simulating a drone, is it necessary to simulate all rotors in the same domain or they can be in separated simulations?
thanks

[@fatmatt_sw2650]

you can simulate just one and use periodic boundaries.

[@bucaliii_35_sheqilll]

Thanks for interesting tutorial... I have an question, why do you put inlet velocity(15m/s)? not just set it pressure outlet?

[@UnfinishedEngineer]

same question here!!..when you have RPM why inlet velocity.. and how to find that inlet velocity with testing physically

[@bucaliii_35_sheqilll]

@@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]

[@krissijuniorzimba4083]

merci beacoup

[@goodday276]

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.

[@jhhe8781]

yes, I am confused too. but in the result it seems like zero

[@xxroco0418xx]

I think he knew in advance the advance ratio data at a certain rpm.

[@UnfinishedEngineer]

@@xxroco0418xx same question here!!..when you have RPM why inlet velocity.. and how to find that inlet velocity with testing physically

[@AyeshaNaseem-fq5tp]

hey what is dimensons of your propeller???
imean the diamater and chord?

[@Antonio-ig4un]

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!!!

[@samdougherty5559]

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

[@ninamoello]

@@samdougherty5559 same problem here, still trying to find a solution!

[@9_budimanapriutomo238]

@@samdougherty5559 i think your velocity direction is not correct

[@kuldeepnamdeo8707]

Hello can you tell me what is that error that you are getting when you begin calculation "mesh interface overlaps for interface zone"

[@shotglass2858]

Your meshing isn't proper

[@bazz9920]

My mesh propeller mesh looks bad what should i do

[@zhonghuang4307]

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?

[@ionaguirre111]

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.

[@mahsiseua]

i use ansys 2018. no option for force. only drag, lift and moment

[@chetnaprajapati9483]

wich software use with version name plz

[@omkarkore7453]

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.

[@christianlabanca5377]

Are you rotating it in the right direction?

[@abhilashm6711]

@@christianlabanca5377 can I get your mail id plz :). ?

[@christianlabanca5377]

@@abhilashm6711 Yeah sure. It's [e-mail]
If you have any questions we can try and solve them

[@xxroco0418xx]

the rotating direction is not correct

[@egecanbiryan1096]

i get the" run cannot be started until validation issues are resolved " error in the calculation stage, what should i do ?

[@jessythomas5865]

Same here

[@xxroco0418xx]

How i get torque? Besides, that Force value is straightaway in Newtons ?

[@kesavdarshan]

Multiply the force with radii

[@date8384]

Why is the thrust so low? Isn't it normally in the range of 500-600 N for a regular drone blade?

[@ionaguirre111]

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.

[@kesavdarshan]

Where did he shown the thrust man?gimme the timestamp

[@007aha1]

0:44 why is gravity in y direction???? shouldnt it be in x or z direction?!

[@ionaguirre111]

This seems to be a drone propeller, so gravity works along he rotational axis.

[@zhangzhang4863]

Why the thrust just 50n ?

[@xxroco0418xx]

the same i ask

[@ionaguirre111]

Inlet speed too high for that propeller design.

[@yajatvashisht4873]

I think the propeller he used is in the range 12-20 inches and for that kind of propeller this thrust (5kg) is justified