Channel form for a rotating pressure exchanger

A pressure exchanger for transferring pressure energy from a first liquid in a first liquid system to a second liquid in a second liquid system, having a housing with inlet and outlet connection openings for each liquid and a rotor ( 1 ) arranged in the housing for rotation about a longitudinal axis. A number of through rotor channels ( 2 ) are arranged around the rotor longitudinal axis with openings ( 4 ) on each axial end face of the rotor. The rotor channels ( 2 ) are arranged for connection through opposing flow openings formed in the housing to the connection openings of the housing such that during rotation of the rotor, high pressure liquid and low pressure liquid are alternately introduced into the respective systems. Liquid flowing to the rotor through the flow openings formed in the housing generates a circumferential force component (cu) in the relative rotating system of the rotor for driving the rotor, and starting at or following the openings ( 5 ) a flow guiding configuration ( 8 ) formed as a rotor channel flow diverting contour is arranged in the rotor channels ( 2 ).