Compressor surge based on a 1D-3D coupled method–Part 2: Surge investigation

Compressor characteristics and system parameters, which include pipe lengths, plenum volumes, and throttle coefficients, greatly affect compressor surge. The one-dimensional-three-dimensional (1D-3D) coupled method, is established in Part 1, combines a 3D solver for compressor internal flows and a 1D solver for pipe, plenum, and throttle flows to simulate compressor surge in a compression system. In this paper, the capability of the method to reflect changes of compressor characteristics and system parameters will be demonstrated. Given a centrifugal compressor, variable inlet prewhirl and variable diffuser vanes are employed to adjust compressor characteristics; based on the setup of a datum test rig, the pipe length, plenum volume and throttle coefficient in the 1D solver are modified to get different system setups. Thus, the compressor system can be numerically configured with various compressor …