TY  - EJOU
AU  - Ji, Chunxiu 
AU  - Xie, Dan 

TI  - Aeroelastic	Stabilities	Analysis	of	a	Transonic	Fan	Rotor	NASA	Rotor67
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 25
IS  - 3
SN  - 1933-2815

AB  - Blade	 flutter	 is	 a	 complex	 phenomenon	 that	 can	 lead	 to	 serious	 damage	 or	 failure	 of	 turbomachinery	
systems.	Predicting	and	mitigating	blade	flutter	is	therefore	an	important	aspect	of	the	design	and	analysis	
of	these	systems[1].	In	this	paper,	we	present	a	comparative	study	of	two	representative	methods	for	blade	
flutter	 predictions:	 the	 energy	 method	 and	 the	 computational	 fluid	 dynamics/computational	 structural	
dynamics	(CFD/CSD)	coupled	time-domain	method.	The	energy	method	is	a	decoupled approach	that	uses	
a	simplified	model	of	the	blade	and	fluid-structure	interaction	to	calculate	the	stability	boundaries	of	the	
system[2].	 The	 time-domain	method,	 on	 the	 other	 hand,	is	a	more	 detailed	approach	 that	 simulates	 the	
unsteady	flow	and	structural	dynamics	of	the	system	in	time[3].	To	compare	these	methods,	we	apply	them	
to	NASA	Rotor67 under	various	 flow	conditions	and	investigate	 their	accuracy,	computational	efficiency,	
and	ease	of	implementation.	Our	results	show	that	the	energy	method	is	generally	faster	and	simpler	to	use,	
but	can	be	less	accurate	in	certain	situations.	The	time-domain	method,	on	the	other	hand,	provides	more	
detailed	and	accurate	predictions,	but	is	computationally	more	expensive	and	requires	more	expertise	to	
implement.	Overall,	our	study	suggests	that	the	choice	of	method	depends	on	the	specific	requirements	and	
constraints	of	the	application.	Both	methods	have	their	advantages	and	limitations,	and	can	be	used	together	
to	provide	complementary	insights	into	the	blade	flutter	behavior	of	turbomachinery	systems.
KW  - Blade	flutter;	computational	fluid	dynamics (CFD);	energy	method;	time-domain	coupled	method

DO  - 10.32604/icces.2023.010329