48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.)最新文献_第3页

Withdrawal: Numerical studies of a buoy system; a comparison between LES and SAS 撤回:浮标系统的数值研究;LES和SAS的比较

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-25 DOI: 10.2514/6.2018-3537.C1

M. Ilie, K. Harris

引用次数: 0

Rigid Body Response of a Mach 2 Shock Train to Downstream Forcing 2马赫激波列车对下游力的刚体响应

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3542

Louis M. Edelman, M. Gamba

引用次数: 4

Concentration Measurements in Simulations of the Variable Density Mixing Layer 变密度混合层模拟中的浓度测量

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3865

Jiang Huang, W. A. McMullan

引用次数: 0

Direct Numerical Simulation of Receptivity to Roughness in a Swept-Wing Boundary Layer at High Reynolds Numbers 高雷诺数下后掠翼边界层粗糙度接受度的直接数值模拟

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3076

G. Nicholson, Chao Zhang, L. Duan, M. Malik, Fei Li, A. Uzun

{"title":"Direct Numerical Simulation of Receptivity to Roughness in a Swept-Wing Boundary Layer at High Reynolds Numbers","authors":"G. Nicholson, Chao Zhang, L. Duan, M. Malik, Fei Li, A. Uzun","doi":"10.2514/6.2018-3076","DOIUrl":"https://doi.org/10.2514/6.2018-3076","url":null,"abstract":"Direct numerical simulations (DNS) are performed to examine the receptivity to roughness in a spatially developing three-dimensional boundary layer over an inﬁnite-swept natural-laminar-ﬂow wing at a freestream Mach number of 0 . 75 and a chord Reynolds number of approximately 25 million based on the long, swept chord. Stationary crossﬂow disturbances are excited by applying either critically spaced discrete cylinders of micron size or naturally occurring distributed roughness in the leading-edge region. The DNS data show that the spanwise spectral content of the excited crossﬂow disturbances is highly dependent upon the shape of roughness elements, and the initial growth of the crossﬂow structures is a nonlinear function of the element height. The linear growth rate of the excited crossﬂow disturbances predicted by DNS shows good agreement with linear parab-olized stability equations. The receptivity study lays the foundation for investigating the stabilization of the naturally most unstable steady crossﬂow mode by using spanwise periodic DREs","PeriodicalId":93061,"journal":{"name":"48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.)","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75578025","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: 1

Instabilities in Mach 6 Flow over a Cone with a Swept Fin 6马赫后掠翼锥体流动的不稳定性

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3071

Anthony L. Knutson, G. Sidharth, G. Candler

引用次数: 16

Heat and Fluid Flow around a Cylinder in Wake 尾流中圆柱体周围的热量和流体流动

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3083

Farhan Zafar, M. Alam

引用次数: 1

Analysis of uncertainty sources in DNS of a turbulent mixing layer using Nek5000 用Nek5000分析湍流混合层DNS的不确定源

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3226

D. F. J. Colmenares, S. Poroseva, Y. Peet, S. Murman

引用次数: 1

Optimum gaits of 2D thunniform locomotion for efficient swimming and performance of fish pair 二维匀速运动的最佳步态对高效游泳和鱼对性能的影响

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-2915

Yiqin Xu, Y. Peet

引用次数: 6

PIV and Rotational Raman-Based Temperature Measurements for CFD Validation in a Single Injector Cooling Flow 基于PIV和旋转拉曼的单喷油器冷却流CFD温度测量验证

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3857

M. Wernet, N. Georgiadis, R. J. Locke

{"title":"PIV and Rotational Raman-Based Temperature Measurements for CFD Validation in a Single Injector Cooling Flow","authors":"M. Wernet, N. Georgiadis, R. J. Locke","doi":"10.2514/6.2018-3857","DOIUrl":"https://doi.org/10.2514/6.2018-3857","url":null,"abstract":"Film cooling is used in a wide variety of engineering applications for protection of surfaces from hot or combusting gases. The design of more efficient thin film cooling geometries/configurations could be facilitated by an ability to accurately model and predict the effectiveness of current designs using computational fluid dynamics (CFD) code predictions. Hence, a benchmark set of flow field property data were obtained for use in assessing current CFD capabilities and for development of better turbulence models. Both Particle Image Velocimetry (PIV) and spontaneous rotational Raman scattering (SRS) spectroscopy were used to acquire high quality, spatially-resolved measurements of the mean velocity, turbulence intensity and also the mean temperature and normalized root mean square (rms) temperatures in a single injector cooling flow arrangement. In addition to flowfield measurements, thermocouple measurements on the plate surface enabled estimates of the film effectiveness. Raman spectra in air were obtained across a matrix of radial and axial locations downstream from a 68.07 mm square nozzle blowing heated air over a range of temperatures and Mach numbers, across a 30.48cm long plate equipped with a single injector cooling hole. In addition, both centerline streamwise 2-component PIV and cross-stream 3-component Stereo PIV data at 15 axial stations were collected in the same flows. The velocity and temperature data were then compared against Wind-US CFD code predictions for the same flow conditions. The results of this and planned follow-on studies will support NASA’s development and assessment of turbulence models for heated flows.","PeriodicalId":93061,"journal":{"name":"48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.)","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77775976","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: 15

Crossflow Stability of a Swept Flat Plate with Wavy Leading Edge 波浪前缘掠板的横向流动稳定性

48th AIAA Fluid Dynamics Conference 2018 : held at the AIAA Aviation Forum 2018 : Atlanta, Georgia, USA, 25-29 June 2018. AIAA Fluid Dynamics Conference (48th : 2018 : Atlanta, Ga.) Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3389

M. Owen, A. Frendi

引用次数: 0