@inproceedings {PUBA232,
	title = {A Study of a modern transonic low-aspect ratio fan rotor in a small turbofan engine},
	author = {Toyotaka Sonoda AND Rainer Schnell AND Toshiyuki Arima AND Giles Endicott AND Eberhard Nicke},
	year = {2013},
	month = {June},
	abstract = {In this paper, Reynolds effects on a modern transonic low-
aspect-ratio  fan  rotor  (Baseline)  and  the  re-designed 
(optimized) rotor performance  are  presented  with  application 
to a small turbofan engine. The re-design has been done using 
an in-house numerical optimization system in Honda and the 
confirmation of the performance was carried out using DLR{\textquoteright}s 
TRACE  RANS  stage  code,  assessed  with  respect  to 
experimental data obtained from a small scale compressor rig 
in Honda. The baseline rotor performance is evaluated at two 
Reynolds  number  conditions,  a  high  Reynolds  condition 
(corresponding to a full engine scale size) and a low Reynolds 
number  condition  (corresponding  to  the  small  scale 
compressor  rig  size),  using  standard  ISA  conditions.  The 
performance of the optimized rotor  was  evaluated  at  the  low 
Reynolds number condition. The CFD results show significant 
discrepancies  in  the  rotor  efficiency  (about  1\%  at  cruise) 
between  these  two  points  due  to  the  different  Reynolds 
numbers.  The  optimized  rotor{\textquoteright}s  efficiency  is  increased 
compared to the baseline. A unique negative curvature region 
close  to  the  leading  edge  on  the  pressure  surface  of  the 
optimized rotor is one of the reasons why the optimized rotor is 
superior to the baseline. },
	publisher = {ASME},
	booktitle = {ASME Turbo Expo 2013}
}