... Abstract In the most industries that manufacture compressors, it is very common to encounter noise issues on the compressor wheel while its operation. This noise is likely due to a pressure gradient along the compressor blades with inlet air flowing through them. This paper presents...

... be induced by the structural nonlinearities of turbine blades. Through previous experiments and simulations conducted in the authors’ group, it has been shown that Gaussian white noise can effectively suppress these energy localizations. However, the Gaussian white noise model is unphysical, since...

... Abstract For the development of low-noise fan designs the sound generation must be reduced at the source, but also sound transmission effects through the rotor can be exploited to reduce the noise emitted to the far-field. Rotor shielding has been identified as a means of noise abatement, where...

... without noise, as well as at the maximum noise intensity. We observe that the mode nature that dominates in the presence of an intense noise may be far from the one observed in noise-free conditions. To better understand the effect of noise in the presence of asymmetries, we repeat some of the experiments...

... in an optimization algorithm taking installation effects into account. The noise emitted by the fan is addressed by a smoothed inflow velocity profile, a new blade sweep strategy, the reduction of secondary flows, and the reduction of fan size and rotational speed. The optimized fan unit is then integrated...

... An important subsystem in most surface transport vehicles is the forced-air cooling module. Under specific operational conditions of the vehicle the cooling system is the major noise source and the component with the largest consumption of energy. A comprehensive time domain simulation model...

..., with initial operating capability around 2015, 2020, and 2030, respectively. Each generation has associated goals for fuel burn, NO x , noise, and field-length reductions relative to today’s aircrafts. The research for the 2020 generation is directed at enabling a hybrid wing body (HWB) aircraft to meet NASA’s...

... 04 08 2009 This paper deals with the effect of the blade leading edge location (R LSD ) of a low solidity cascade diffuser (LSD) on noise and diffuser performance in a centrifugal blower. The noise of the LSD was measured and analyzed comparing with that of vaneless diffuser (VLD...