MACROSCOPIC BALANCE MODEL FOR WAVE ROTORS

A mathematical model for wave rotors is described, The wave processes that affect energy exchange within the rotor passages are modeled usin g one-dimensional gasdynamics. Macroscopic balances relate volume-aver aged thermodynamic properties in the rotor passage control volume to t he mass, momentum, and energy fluxes at the ports, Simple loss models are used to estimate entropy production in boundary layers and in sepa rating flows caused by blade-blockage, incidence, and the gradual open ing and closing of rotor passages, The mathematical model provides a b asis for designing port and rotor geometry, and for predicting design- point wave rotor performance, Model predictions are evaluated through comparisons with computational fluid dynamics calculations and three-p ort wave rotor experimental data, A four-port wave rotor design exampl e is provided to demonstrate model applicability, The modeling approac h is amenable to wave rotor optimization studies and rapid assessment of the tradeoffs associated with integrating wave rotors into gas turb ine engine systems.