[amin_u50]

Hello,
I validated my model at full load conditions. Then I examined the effect of swirl ratio of 1.5 while all other parameters were kept constant. With swirl ratio of 1.5, the in-cylinder pressure and HRR increased compared to my base case (experiment, swirl ratio of 0.1). However, the CH4 emissions increased. The CH4 emission of swirl ratio of 1.5 is 920 ppm and it is 880 ppm for swirl ratio of 0.1 (base case). It's weird for me.


Then I looked at the number of cells and found that for swirl ratio of 1.5, the AMR behavior is hugely different than swirl ratio of 0.1 (during the expansion which is mostly flame propagation of natural gas). I expected that when we increase the swirl ratio the number of cells should be increased, but I got the opposite trend. I appreciate if anyone could give me some advice.


Regards,

Amin.

[yli]

Hi Amin_u50,
Sameera has worked on this question and if you need further assistance please contact him off-line. Thanks.