국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Numerical Studies of an Array of Fluidic Diverter Actuators for Flow Control
저자	Gokoglu, Suleyman A.;; Kuczmarski, Maria A.;; Culley, Dennis E.;; Raghu, Surya
Keyword	ACTUATORS;; ASYMMETRY;; BOUNDARY CONDITIONS;; DEFECTS;; FLUIDICS;; PERTURBATION;; SENSITIVITY;; SYNCHRONISM;; TURBOMACHINERY
URL	http://hdl.handle.net/2060/20110023436
보고서번호	NASA/TM-2011-217259
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	In this paper, we study the effect of boundary conditions on the behavior of an array of uniformly-spaced fluidic diverters with an ultimate goal to passively control their output phase. This understanding will aid in the development of advanced designs of actuators for flow control applications in turbomachinery. Computations show that a potential design is capable of generating synchronous outputs for various inlet boundary conditions if the flow inside the array is initiated from quiescence. However, when the array operation is originally asynchronous, several approaches investigated numerically demonstrate that re-synchronization of the actuators in the array is not practical since it is very sensitive to asymmetric perturbations and imperfections. Experimental verification of the insights obtained from the present study is currently being pursued.