How to Model Turbine Blade Boundary in FLUENT?

[this_dude]

hi guys,

i was hoping someone could possibly help me out with a problem i am having.

please take a look at the attached picture. i am modeling a turbine blade, trying to find how different configurations for internal cooling configuration affect the overall temperature distribution in the blade.

i am having trouble setting the initial state in FLUENT before running the simulation. the blade is a solid, the area around it is a fluid. basically, as the set-up is atm, around the blade, i have a velocity flow at a given temperature. the cooling holes are assigned negative heat flux values. I'm not entirely sure how to set the the blade boundary so it is modeled as 'real'. i currently have a heat flux value assigned to it, which does not represent what would really be happening.

could someone possibly assist me by telling me how it is i should be modeling the blade boundary, and how i can go about doing this within FLUENT.

any help is greatly appreciated.

many thanks in advance.

 

[jaap de vries]

This is a conjugate heat transfer problem, Go to www.fluent.com and you can download tutorials for these kind of problems.

If you have set the outside blade as a "wall" you can specify heat transfer coefficient

 

[Peter Hiatt]

As a check of real life. Material specialists can determine within one degree what your blades actually see. This can be important in seeing if your thermocouples are set in the right place. It has a big impact on life expectancy and performance like thrust and fuel efficiency.

 

[tommycw]

In order to solve for the blade temperature distribution, you need to first solve for the internal cooling of blade, which requires a conjugate heat and mass transfer analysis. Another simplified approach is to simply impose the heat transfer coefficient for the internal convective cooling and cooling air temperature if you know the values.