국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Broadband Fan Noise Prediction System for Turbofan Engines : Volume 1;; Setup_BFaNS User''s Manual and Developer''s Guide
저자	Morin, Bruce L.
Keyword	AERODYNAMIC NOISE;; BOUNDARY LAYERS;; BROADBAND;; FAN BLADES;; GUIDE VANES;; NOISE PREDICTION (AIRCRAFT); POWER SPECTRA;; ROTOR STATOR INTERACTIONS;; TRAILING EDGES;; TURBOFAN ENGINES;; USER MANUALS (COMPUTER PROGRAMS)
URL	http://hdl.handle.net/2060/20110003464
보고서번호	NASA/CR-2010-216898/VOL1
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Pratt & Whitney has developed a Broadband Fan Noise Prediction System (BFaNS) for turbofan engines. This system computes the noise generated by turbulence impinging on the leading edges of the fan and fan exit guide vane, and noise generated by boundary-layer turbulence passing over the fan trailing edge. BFaNS has been validated on three fan rigs that were tested during the NASA Advanced Subsonic Technology Program (AST). The predicted noise spectra agreed well with measured data. The predicted effects of fan speed, vane count, and vane sweep also agreed well with measurements. The noise prediction system consists of two computer programs: Setup_BFaNS and BFaNS. Setup_BFaNS converts user-specified geometry and flow-field information into a BFaNS input file. From this input file, BFaNS computes the inlet and aft broadband sound power spectra generated by the fan and FEGV. The output file from BFaNS contains the inlet, aft and total sound power spectra from each noise source. This report is the first volume of a three-volume set documenting the Broadband Fan Noise Prediction System: Volume 1: Setup_BFaNS User s Manual and Developer s Guide;; Volume 2: BFaNS User''s Manual and Developer s Guide;; and Volume 3: Validation and Test Cases. The present volume begins with an overview of the Broadband Fan Noise Prediction System, followed by step-by-step instructions for installing and running Setup_BFaNS. It concludes with technical documentation of the Setup_BFaNS computer program.