REG : HEAT SOURCE DEFINITON IN CONJUGATE HEAT TRANSFER ANALYSIS

SIVAPRAKASH V

Hi Good Morning,
I performing a Conjugate heat transfer analysis. In our model we have a motor, for stator and armature shaft we know values of Resistance and current.
Now, In sim lab there is three possible ways to feed the heat source values and I attached the image below. So My doubt is how I consider the heat source of the motor. Generally heat was produced due the combination of stator as well as armature shaft ( rotor). 

For example:
Consider R is 3.1 to 3.5 ohms and the Current I is 5 A for stator as well as armature shaft ( rotor). 
Is this values applicable for that copper windings in stator and rotor or else entire stator and rotor assembly. 
How to apply the heat source values using the above data's.


I request you to help me on this.

Santhoshkumar

Hello,

Kindly calculate the heat generation from the inputs (Voltage and Current) for each body (Stator, Rotor separately) or all bodies (total heat generation for Stator and Rotor).

Note: Since you have mentioned Stator and Rotor, we have explained everything considering Stator and Rotor.

In the "Heat Source" dialog, we have the following 2 options

• Heat source density - Define the value of Total heat generation (Total heat / Volume of stator and rotor)
• Heat source on each body - Define the value of heat generation from each body.

Based on the available data, define the heat source by using any one of the above 2 options.

Please let me know if you have any further queries.

Thank you,

Santhoshkumar

Santhoshkumar

Hello,

Kindly calculate the heat generation from the inputs (Voltage and Current) for each body (Stator, Rotor separately) or all bodies (total heat generation for Stator and Rotor).

Note: Since you have mentioned Stator and Rotor, we have explained everything considering Stator and Rotor.

In the "Heat Source" dialog, we have the following 2 options

• Heat source density - Define the value of Total heat generation (Total heat / Volume of stator and rotor)
• Heat source on each body - Define the value of heat generation from each body.

Based on the available data, define the heat source by using any one of the above 2 options.

Please let me know if you have any further queries.

Thank you,

Santhoshkumar

SIVAPRAKASH V

Hi santhoshkumar,

Thankyou for your reply.

Here we have the values, Consider R is 3.1 to 3.5 ohms and the Current I is 5 A for stator as well as armature shaft ( rotor). 

P=(I)^2 *R, then P=87.5 W, For stator and rotor P= 87.5 *2= 175W power produced by the two parts.
Then where I apply the heat source value either the copper windings of stator and rotor or entire stator assembly which contains copper windings and steel stacks/ armature copper windings or entire armature parts which contains steel stacks, insulation materials.

Thanks & Regards,
Sivaprakash V.

Santhoshkumar

SIVAPRAKASH V said:

Hi santhoshkumar,

Thankyou for your reply.

Here we have the values, Consider R is 3.1 to 3.5 ohms and the Current I is 5 A for stator as well as armature shaft ( rotor). 

P=(I)^2 *R, then P=87.5 W, For stator and rotor P= 87.5 *2= 175W power produced by the two parts.
Then where I apply the heat source value either the copper windings of stator and rotor or entire stator assembly which contains copper windings and steel stacks/ armature copper windings or entire armature parts which contains steel stacks, insulation materials.

Thanks & Regards,
Sivaprakash V.

Hello Sivaprakash,

As per our understanding, you are getting the heat generation output from current and resistance which is passing through copper windings of stator and rotor. We feel it is appropriate to apply heat source on the windings.

Thank you

Santhoshkumar

SIVAPRAKASH V

Thankyou for your reply.
I understood and I assigned the heat source in the windings for stator and rotor.