TY - JOUR
TI - Methods of ducted fan aircraft propulsion unit noise prediction
AU - Hlaváček, David
TI - Methods of ducted fan aircraft propulsion unit noise prediction
AB - 
	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.
VL - 2013
IS - Mechanics Issue 1-M (5) 2013
PY - 2014
SN - 0011-4561
C1 - 2353-737X
SP - 155
EP - 165
DO - 10.4467/2353737XCT.14.020.1946
UR - https://ejournals.eu/en/journal/czasopismo-techniczne/article/methods-of-ducted-fan-aircraft-propulsion-unit-noise-prediction
KW - UL-39
KW - ducted fan propulsion unit
KW - rotor-stator interaction noise
KW - rotor-alone noise
KW - cold air jet noise
KW - flow passage noise