This looks a lot like Rhyncattleanthe Thi-Ti, formerly it was a Potinara (Brassavola x Laelia x Cattleya) but when some laelias became cattleya, some cattleyas became Guarianthe and some Brassavola became Rhyncholaelia, the new geneus name is Rhyncattleanthe. It may change again LOL, but you can sure it is Thi-Ti.