국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Development and Validation of a Multidisciplinary Tool for Accurate and Efficient Rotorcraft Noise Prediction (MUTE)
저자	Liu, Yi;; Anusonti-Inthra, Phuriwat;; Diskin, Boris
Keyword	ALGORITHMS;; BLADE-VORTEX INTERACTION;; COMPUTATIONAL FLUID DYNAMICS;; COMPUTATIONAL GRIDS;; COMPUTERIZED SIMULATION;; DYNAMIC STRUCTURAL ANALYSIS;; FLIGHT TESTS;; LOW SPEED;; NOISE PREDICTION;; ROTARY WING AIRCRAFT;; UH-60A HELICOPTER;; WAKES
URL	http://hdl.handle.net/2060/20110007358
보고서번호	NASA/CR-2011-217057
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A physics-based, systematically coupled, multidisciplinary prediction tool (MUTE) for rotorcraft noise was developed and validated with a wide range of flight configurations and conditions. MUTE is an aggregation of multidisciplinary computational tools that accurately and efficiently model the physics of the source of rotorcraft noise, and predict the noise at far-field observer locations. It uses systematic coupling approaches among multiple disciplines including Computational Fluid Dynamics (CFD), Computational Structural Dynamics (CSD), and high fidelity acoustics. Within MUTE, advanced high-order CFD tools are used around the rotor blade to predict the transonic flow (shock wave) effects, which generate the high-speed impulsive noise. Predictions of the blade-vortex interaction noise in low speed flight are also improved by using the Particle Vortex Transport Method (PVTM), which preserves the wake flow details required for blade/wake and fuselage/wake interactions. The accuracy of the source noise prediction is further improved by utilizing a coupling approach between CFD and CSD, so that the effects of key structural dynamics, elastic blade deformations, and trim solutions are correctly represented in the analysis. The blade loading information and/or the flow field parameters around the rotor blade predicted by the CFD/CSD coupling approach are used to predict the acoustic signatures at far-field observer locations with a high-fidelity noise propagation code (WOPWOP3). The predicted results from the MUTE tool for rotor blade aerodynamic loading and far-field acoustic signatures are compared and validated with a variation of experimental data sets, such as UH60-A data, DNW test data and HART II test data.