Hi Deepika,
You could upload the SWF file into the Portal KM. You would then need to write a HTML file to wrap the SWF. There are lots of guides online about how to write this wrapper html like this:
http://help.adobe.com/en_US/flex/using/WS2db454920e96a9e51e63e3d11c0bf69084-7ba8.html
Hth,
Simon