I don't think so. The thing is, jets (and specifically high bypass turbofans, which I believe you were referencing) usually have pretty low fuel/air ratios (they burn a lot of air per unit fuel). That makes them efficient on Kerbin/Earth, because they get the majority of the fuel essentially for free. On Eve, you would have to supply the combustible air yourself, and you'd need a lot of it, which would be bothersome. If you use pure oxidizer, which would burn much better than air (giving higher fuel/oxidizer ratio), you'd need much less of it per unit fuel - but hey, that sounds exactly like what a normal LFO rocket does. So it basically boils down to exhaust utilization: nozzles vs. fans. And if my physics knowledge isn't wrong, nozzles win. They utilize their energy straightforwardly (and pretty efficiently if we use aerospikes... also independent on air pressure). The turbofan engines would have to use most of the chemical energy to turn the fans, who would then push the air. I haven't done any math, but intuitively there is an extra step that would be wasting energy. And you cannot gain more energy from a system than you put in, so unless the Evian air is giving you energy like Kerbin's air does, the design is going to be less efficient. Also, because the thrust of a turbofan engine is a function of intake air mass flow, as the air pressure decreases, so does the thrust. But I could be wrong