Bad Mesh Quality near the Body
 

Hello,

I want to simulate the flow past a Diffusor. But I had some problems with meshing. My mesh quality near my body is bad.
Skewness max 0.88
Orthogonal min 0.11
I had this problem with other geometry's too. Like Front or rear wing.
Where is my mistake? How can I improve the Mesh quality in this area?

Thanks in advance