[Eleven Leo]

Hi,

When I look at dynamic.out, I find there are three swirl ratio, swirl ratio, swirl ratio X+, and swirl ratio X-. What is the meaning of the three ratios, how to calculate them? Thank you very much for your help.

Best regards

Yaopeng

[Blanco]

Hi,
you can find more info in the manual, section 23.13 dynamic.out, dynamic_region<ID>.out. The "swirl ratio" is always the average swirl ratio along the specific axis

[Eleven Leo]

Originally Posted by Blanco

Hi,
you can find more info in the manual, section 23.13 dynamic.out, dynamic_region<ID>.out. The "swirl ratio" is always the average swirl ratio along the specific axis

Hi, Blanco

Yes, the swirl ratio is the angular speed around the mass center. But besides the swirl ratio, there are two other swirl ratio, Swirl X+ and Swirl X-. Do they correspond to the positive or negative value of εinj, as seen in the attachment?

Thank you for your answer.

Best regards

[Blanco]

Originally Posted by Eleven Leo

Hi, Blanco

Yes, the swirl ratio is the angular speed around the mass center. But besides the swirl ratio, there are two other swirl ratio, Swirl X+ and Swirl X-. Do they correspond to the positive or negative value of εinj, as seen in the attachment?

Thank you for your answer.

Best regards

Hi Leo,

Well, no, your attachment is showing the permutations needed to go from eq. 23.6 to 23.8. Swirl X+ and Swirl X- are just the resulting swirl ratio computed considering only the positive or negative components of angular momentum along the x axis.

Hope this helps,

Best regards

[Eleven Leo]

Originally Posted by Blanco

Hi Leo,

Well, no, your attachment is showing the permutations needed to go from eq. 23.6 to 23.8. Swirl X+ and Swirl X- are just the resulting swirl ratio computed considering only the positive or negative components of angular momentum along the x axis.

Hope this helps,

Best regards

OK, I see. Thank you very much for your answer.

Best regards
Yaopeng