Abstract: Washer-Dryer being the prevailing machine in the current market. How to improve the drying efficiency is the main problem of machine industry. Based on the Computational Fluid Dynamics, simulated the water flow path in the rear-drum condensing structure of Washer-Dryer with the VOF model. The results of simulation correspond with the actual results by experiment, proved the accuracy of the model and simulation. On this basis, redesigned and improved the condensing structure, researched the factors which influence the water flow stability of rear-drum condensing structure. Computed the relationship with inlet-water cover plate and the distance of the outlet-water and the first diversion point of fillets. Finally, assured the range of design parameters by comparing the water flow path in different working conditions. Drying time is measured through the experiment indicated the results attain to expectation. CFD simulation is accurate and feasible to research the program, and the importance of guide is found to the future design in the same stucture of Washer-Dryer.

Key words: Washer-Dryer, Drying efficiency, VOF model, Rear-drum condensing