Hi,
The image in question is taken from a collection of photos taken during a conference on "High Speed Trans Atmospheric Air and Space Transportation" in 2007 in Hyderabad. Others are sourced from a few research papers published on the topic.
As of now, there are no documents on these projects in public circulation apart from a few papers published. I'll be posting a gist of them in the "Indian hypersonic thread"..
However, if I do come across any such public document, I'll be sure to inform you about it.
Regards,
GK