Optimization Design and Pressure Fluctuation Suppression Based on Orthogonal Method for a Centrifugal Compressor

An air compressor is the core component of supply system a hydrogen fuel cell, which demands high efficiency and reliable stability in wide operation region. In this work, centrifugal for cell first designed then measured experimentally. Furthermore, test rig assessing aerodynamic performance established, includes pipeline, gas flowmeter, flow regulating valve, pressure transmitter, compressor, controller, DC power computer. Then, orthogonal method employed to conduct optimization. Four optimization parameters—including blade number, angle at inlet, outlet wrap angle—are set with three levels. Nine individuals are according method, numerical simulation implemented confirm pattern. Results show that number has greatest influence on compressor’s performance, inlet also very important. The optimal improves compared baseline compressor; efficiencies 81.3% 83.8%, respectively, improving by 2.5%. frequency domain fluctuation related stator-rotor interaction. peak value amplitude occurs rotation 833 Hz its harmonic frequency. comparison obviously reduced, especially near volute tongue.