2018 AIAA/CEAS Aeroacoustics Conference最新文献_第4页

Proper Orthogonal Decomposition and its Use in the Analysis of Fluid Structure Interaction Noise 适当正交分解及其在流固耦合噪声分析中的应用

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3787

S. Glegg, W. Devenport, Nicholas J. Molinaro, W. N. Alexander

引用次数: 1

Hybrid Methods for the Prediction of the Noise Radiated by a Mach 0.5 Ducted Orifice Flow 0.5马赫管道孔板流辐射噪声预测的混合方法

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3929

Z. Jardon, U. Karban, J. Christophe, C. Schram

引用次数: 0

Sonic Boom Prediction Using FUN3D High-Order U-MUSCL Schemes 用FUN3D高阶U-MUSCL方案预测音爆

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3457

Simon Yang, Hong Yang, R. Harris

引用次数: 0

Applications of Parallel-Element, Embedded Mesh-Cap Acoustic Liner Concepts 平行单元、嵌入式网格帽声学衬垫概念的应用

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3445

Michael G. Jones, D. Nark, A. Baca, Clark R. Smith

{"title":"Applications of Parallel-Element, Embedded Mesh-Cap Acoustic Liner Concepts","authors":"Michael G. Jones, D. Nark, A. Baca, Clark R. Smith","doi":"10.2514/6.2018-3445","DOIUrl":"https://doi.org/10.2514/6.2018-3445","url":null,"abstract":"This study explores progress achieved with 2DOF, 3DOF, and MDOF acoustic liners constructed with mesh caps embedded within a honeycomb core. These liner configurations offer potential for broadband noise reduction, and are suitable for conventional aircraft implementation. Samples for each configuration are tested in the NASA normal incidence tube and grazing flow impedance tube, with and without a wire mesh facesheet. Impedances based on these measured data compare favorably with those predicted using a transmission line impedance prediction model. Predicted impedances are then used as input for an aeroacoustic propagation code to compute axial acoustic pressure distributions in the grazing flow tube. These predicted distributions compare favorably with the corresponding measured distributions at frequencies away from the frequency of peak attenuation, but suffer slight degradation for frequencies very near the peak attenuation frequency, where the predicted results are sensitive to input impedance changes. As expected, the noise reduction frequency range increases as more degrees of freedom are included. Although the specific results achieved herein may differ from those that would be achieved with other 2DOF, 3DOF, and MDOF liners, this comparison highlights some of the key features that can be exploited in the design of parallel-element, embedded mesh-cap liners.","PeriodicalId":429337,"journal":{"name":"2018 AIAA/CEAS Aeroacoustics Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122760517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Comparison of Non-Modal-Based and Modal-Based Impedance Eduction Techniques 基于非模态和基于模态的阻抗消减技术的比较

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3773

Chenyang Weng, L. Enghardt, F. Bake

引用次数: 5

Investigations on Analytic Models of Broadband Wake-Blade Interaction Noise 宽带尾迹-叶片相互作用噪声分析模型研究

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-2959

G. Grasso, S. Moreau, J. Christophe, C. Schram

引用次数: 2

Airfoil Self-Noise Reduction Using Fractal-Serrated Trailing Edge 翼型自噪声降低使用分形锯齿后缘

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3132

S. Hasheminejad, T. Chong, P. Joseph, G. Lacagnina

引用次数: 3

Sound Quality Assessments of Over-the-Wing Engine Configurations Applied to Continuous Descent Approaches 连续下降方法中翼上发动机配置的音质评估

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4083

M. Y. P. Albarran, F. Schültke, E. Stumpf

引用次数: 6

Preliminary Noise Assessment of Aircraft with Distributed Electric Propulsion 分布式电力推进飞机噪声初步评价

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-2817

Athanasios P. Synodinos, R. Self, Antonio J. Torija

{"title":"Preliminary Noise Assessment of Aircraft with Distributed Electric Propulsion","authors":"Athanasios P. Synodinos, R. Self, Antonio J. Torija","doi":"10.2514/6.2018-2817","DOIUrl":"https://doi.org/10.2514/6.2018-2817","url":null,"abstract":"Electric and hybrid-electric propulsion technologies in aviation are becoming more attractive \u0000for aviation stakeholders not only due to the resulting reduction or elimination of the \u0000dependency on oil, whose availability and price are uncertain, but also because they are more \u0000reliable and efficient than traditional internal combustion engines. Moreover, combined with \u0000distributed electric propulsion (DEP), these technologies have shown potential in significantly \u0000reducing civil aircraft community noise impact and contribute towards delivering the strict \u0000mid-to-long-term environmental goals set by organisations worldwide, such as ACARE and \u0000NASA. This paper examines the noise impact of a concept tube and wing aircraft that falls in \u0000the A320 category and features various DEP systems using different power supply units (turboshaft \u0000engines or batteries) and number of electric propulsors. Meanwhile, considerations \u0000required for the transition from conventional to electric propulsion are discussed. Estimated \u0000Noise-Power-Distance (NPD) curves and noise exposure contour maps are also presented. It \u0000is concluded that indeed, the propulsors’ number is a key parameter for optimising the environmental \u0000performance of DEP aircraft and hence maximising the noise benefits. Also, it is \u0000shown that based on the entry into service year (2035) technology, totally electric aircraft tend \u0000to have a larger noise footprint than aircraft using hybrid electric propulsion systems.","PeriodicalId":429337,"journal":{"name":"2018 AIAA/CEAS Aeroacoustics Conference","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123387323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Wiggle Controlled Turbulent Flow Simulations on Structured Grid at Low Mach Number 低马赫数结构网格上摆动控制湍流模拟

2018 AIAA/CEAS Aeroacoustics Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3784

Tomoaki Ikeda, K. Yamamoto, Ryutaro Furuya, T. Hirai, Kentaro Tanaka, K. Amemiya

引用次数: 1