국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Rotary-Wing Relevant Compressor Aero Research and Technology Development Activities at Glenn Research Center
저자	Welch, Gerard E.;; Hathaway, Michael D.;; Skoch, Gary J.;; Snyder, Christopher A.
Keyword	ACTUATORS;; AERODYNAMIC STABILITY;; AERODYNAMIC STALLING;; AERODYNAMICS;; AXIAL FLOW;; CENTRIFUGAL COMPRESSORS;; CENTRIFUGAL FORCE;; COMPRESSORS;; COMPUTERIZED SIMULATION;; DUCTS;; ENGINE PARTS;; EQUIPMENT SPECIFICATIONS;; GENERAL OVERVIEWS;; RESEARCH AND DEVELOPMENT;; ROTARY WING AIRCRAFT;; SUBSONIC SPEED;; TECHNOLOGY UTILIZATION;; UNSTEADY FLOW
URL	http://hdl.handle.net/2060/20120007423
보고서번호	NASA/TM-2012-217280
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Technical challenges of compressors for future rotorcraft engines are driven by engine-level and component-level requirements. Cycle analyses are used to highlight the engine-level challenges for 3000, 7500, and 12000 SHP-class engines, which include retention of performance and stability margin at low corrected flows, and matching compressor type, axial-flow or centrifugal, to the low corrected flows and high temperatures in the aft stages. At the component level: power-to-weight and efficiency requirements impel designs with lower inherent aerodynamic stability margin;; and, optimum engine overall pressure ratios lead to small blade heights and the associated challenges of scale, particularly increased clearance-to-span ratios. The technical challenges associated with the aerodynamics of low corrected flows and stability management impel the compressor aero research and development efforts reviewed herein. These activities include development of simple models for clearance sensitivities to improve cycle calculations, full-annulus, unsteady Navier-Stokes simulations used to elucidate stall, its inception, and the physics of stall control by discrete tip-injection, development of an actuator-duct-based model for rapid simulation of nonaxisymmetric flow fields (e.g., due inlet circumferential distortion), advanced centrifugal compressor stage development and experimentation, and application of stall control in a T700 engine.