Can thrust be produced only using the forward speed of a nozzle?
Something has to provide the energy that is needed to accelerate the air.
In the simplest combustion engines this is the combustion heat. Air expands when heated and when the route out the back is the easiest to take, it will flow that way. More complicated engines use this heat energy to raise the pressure of the air inside the nozzle so there is excess pressure energy that can be converted into speed.
In your converging nozzle there is no excess energy available. In order to stream out the back, the air must have at least ambient pressure when leaving the nozzle. In order to speed up, the pressure ahead of the nozzle must be higher than ambient. But since the air enters the converging nozzle already with ambient pressure and flight speed, it cannot accelerate any more. Instead, the face of the nozzle will block all the air that will not fit through the smaller exit cross section, forcing it to flow around your nozzles. This is almost as effective for producing drag as putting a solid disk into the air stream.