I don't think they plan on putting TVNs on production model J-10s. The J-10B used for TVN testing is obviously a tech demonstrator for future J-20 (J-20B/C) variants.
If they intended to just test the engine a Su-27 derived platform or a J-20 proper i.e. a dual engine aircraft would have made more sense. Just like the Russians are testing the Izdeliye-30 engine on a PAK-FA. I would not be surprised if they actually mean to use this engine in a future version of the J-10 as well.