Overall hydraulic performance prediction method for sink-type dishwasher

An overall hydraulic performance prediction method for a sink-type dishwasher, comprising following steps:

• step 1:
• constructing models of a composite impeller and a twin-volute spraying arm within a dishwasher based on the composite impeller and the twin-volute spraying arm within the dishwasher in a real operational condition, and conducting numerical simulations based on the models to obtain a pump characteristic curve for a new type of dishwasher pump under a static condition of a volute;
• step 2:
• obtaining a full-open flow rate Q0 from the pump characteristic curve, obtaining a rotation velocity adaptation coefficient Ad and an axial velocity coefficient Bd, performing unsteady simulation on a passive rotation of the volute using a GMO-TruVOF method, and obtaining a passive rotation velocity of the volute and a flow rate at an exit of each nozzle;
• and
• step 3:
• taking the passive rotation velocity of the volute and the flow rate at the exit of each nozzle as initial conditions, conducting non-submerged rotational unsteady computation on nozzles based on FAVOR-TruVOF to obtain flow parameters of the dishwasher, and estimating a hydraulic washing capacity of the dishwasher according to the flow parameters.