Department of Aeronautics and Astronautics, Faculty of Engineering
Department of Aeronautics and Astronautics, Graduate School of Engineering
Department of Mechanical and Aerospace Engineering, Aeronautics and Astronautics Course, School of Engineering
At the Aerospace Propulsion Laboratory, out of aerospace propulsion systems, research on airbreathing engines used for the aircrafts are mainly executed. Our main research objects are the internal flows which changes with time, i.e., the deterministic unsteady flows such as flutter of blade rows and fan noise from jet engines, and the stochastic flows originated from turbulence such as the jet noise from aerospace propulsion systems and the fan broad band noise which is of our concern recently. We are working on numerical prediction, elucidation of engineering phenomena, and reduction of undesired phenomena of the time-changing internal flows. We also address to the mixing and combustion enhancement which is one of crucial issues in the hi-speed propulsion systems. Our research methods include the numerical calculation based on the computational fluid dynamics (CFD) and utilization of the experimental facilities such as the jet experimental setup in an anechoic chamber and the fan experimental rig.
Active noise control of a fan noise is executed on the experimental fan rig. By generating the spinning counter-active acoustic modes with the loud speakers mounted on the duct peripheral, a fan noise which is the interaction noise of the rotor and stator blades is to be suppressed in the present experiment.