Abstract：Usually there are computational errors caused from the mixing plane approach to handle rotor-stator interaction and data transfer between mesh blocks when the interaction is treated with a conventional mesh-based numerical method. In order to solve this problem, a new numerical method—meshless moving particle semi-implicit method(MPS)is introduced to simulate a flow in fluid machi-nery.Comparing with mesh-based methods, for this meshless method, not only there is no need to ge-nerate a mesh,but also the entire unsteady flow field that is subject to large deformation can be calculated in one piece. For incompressible fluids, and starting with a simple rotating fluid machine, the basic issues, such as moving boundary model, discretization method for complex geometry, inlet/outlet boundary model and optimization of computational efficiency, which are needed for simulating flow in a fluid machine by using MPS method, were reviewed and analyzed. Furthermore, the accuracy and stability of MPS and its applicability in three-dimensional complex flow domains, computational efficiency and post processing were evaluated. Finally, a prospect that MPS method is going to be applied in flow simulation of fluid machinery in industry was presented.
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