Methods of ducted fan aircraft propulsion unit noise prediction

• Authors: David Hlaváček
• Languages of publication: PL

Abstracts

PL

The UL-39 ultra-light aircraft which is being developed by the Department of Aerospace Engineering, Faculty of Mechanical Engineering, Czech Technical University in Prague, is equipped with an unconventional ducted fan propulsion unit. This paper deals with identifying noise sources of this propulsion unit and easily applicable ways of predicting its noise level. At the end, a few potential noise-suppressing design improvements are presented.

Keywords

PL

UL-39, ducted fan propulsion unit, rotor-stator interaction noise, rotor-alone noise, cold air jet noise, flow passage noise

• Publisher: [unknown2]
• Journal: Czasopismo Techniczne
• Year: -

Dates

online

2015-04-23

Contributors

author

David Hlaváček