The black line is the wire-frame of the model and the yellow line is the region where I'm trying to read the results.

I did tried with different resolutions. But, the results are same. I think it's with the model, C-equation. When I tried with ECFM, I could see the proper velocity profiles. The only issue with ECFM was, it predicted the flame front far downstream. 

Rob mentioned earlier to check by increasing the swirl. This will obviously make the jet wide open with wider recirculation zone.