2018 Atmospheric and Space Environments Conference最新文献_第8页

Development of a Small Modular Multi-Stage Axial Compressor for Ice Crystal Icing Research 用于冰晶结冰研究的小型模块化多级轴流压缩机的研制

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-4133

T. Currie

引用次数: 11

Numerical study on the condensed and frozen water vapor on a flat plate using an open source code 平板上冷凝和冻结水蒸气的数值研究

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3018

Soomin Park, H. Kihara, K. Abe

引用次数: 2

Toward development of the energetic particle radiation nowcast model for assessing the radiation environment in the altitude range from that used by the commercial aviation in the troposphere to LEO, MEO, and GEO 商用航空对流层至LEO、MEO、GEO高度辐射环境的高能粒子辐射临近预报模式研究

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3650

V. Tenishev, D. Borovikov, M. Combi, I. Sokolov, T. Gombosi

引用次数: 1

Numerical Simulation of contrail formation on the Common Research Model wing/body/engine configuration 通用研究模型机翼/机身/发动机构型下尾迹形成的数值模拟

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3189

E. Montreuil, W. Ghedhaifi, Vivien Chmielarski, V. François, F. Gand, A. Loseille

{"title":"Numerical Simulation of contrail formation on the Common Research Model wing/body/engine configuration","authors":"E. Montreuil, W. Ghedhaifi, Vivien Chmielarski, V. François, F. Gand, A. Loseille","doi":"10.2514/6.2018-3189","DOIUrl":"https://doi.org/10.2514/6.2018-3189","url":null,"abstract":"Aircraft contrails may contribute to the global radiative forcing. In this context, the investigation of contrail formation in the near field of an aircraft may be helpful in developing strategies to reduce undesirable impacts. Contrail formation is also a complex topic, since several physical processes are involved, covering a large range of space and time scales, from the engine exit to the atmospheric global scale. In the near field of the aircraft, contrail formation is mainly dominated by microphysics and mixing processes between the propelling jets and the external flow (the so called jet-vortex interaction). In this study, three-dimensional Reynolds-Averaged Navier–Stokes (RANS) simulations of contrails produced by the Common Research Model wing/body/engine configuration during cruise flights is performed. In the present work, a dedicated internal nozzle geometry has been designed to replace the through flow nacelle of the original CRM configuration. Thus, the engine core and bypass flows are actually computed in the simulations, which allows several parametrical studies and avoids using parameterizations to describe the plume's dilution. The objective is to simulate the early development of contrails in a fresh plume whose dilution is obtained with a spatial simulation of jet/vortex interaction. A coupling is carried out with a chemical and a microphysical model implemented in the unstructured Navier-Stokes CFD code CEDRE to simulate particle growth using an Eulerian approach. The implemented microphysics model can simulate water condensation onto soot particles, taking into account their activation by adsorption of sulfur species. In this context, an adaptation grid mesh procedure has been used in order to generate an optimized unstructured mesh in the fluid zone of interest (i.e. vortex wake and jet exhaust).","PeriodicalId":419456,"journal":{"name":"2018 Atmospheric and Space Environments Conference","volume":"22 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":"125354736","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: 3

Fracture of Ice at Interfaces from Molecular Dynamics Simulations 基于分子动力学模拟的界面冰断裂

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3017

A. Afshar, Jing Zong, D. Thompson, D. Meng

引用次数: 2

UAV Icing: Comparison of LEWICE and FENSAP-ICE for Ice Accretion and Performance Degradation 无人机结冰:LEWICE和FENSAP-ICE对结冰和性能退化的比较

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-2861

R. Hann

{"title":"UAV Icing: Comparison of LEWICE and FENSAP-ICE for Ice Accretion and Performance Degradation","authors":"R. Hann","doi":"10.2514/6.2018-2861","DOIUrl":"https://doi.org/10.2514/6.2018-2861","url":null,"abstract":"One of the main limitations of the operational envelope of UAVs today is the risk of atmospheric icing. UAV icing is not well researched and this paper aims to generate a better understanding of how ice accretion and aerodynamic performance degradation on UAV airfoils can be simulated. In particular, the objective is to investigate how well a panel-method based code compares to a modern CFD icing code. LEWICE and FENSAP-ICE are used to generate three characteristic 2D ice shapes (rime, glaze, mixed) on a NREL S826 airfoil for low Reynolds numbers. RANS calculations are performed to assess the resulting aerodynamic performance degradation. Validation of the ice growth predictions is achieved by using literature data. Aerodynamic performance degradation is validated with experimental results from a (non-icing) wind tunnel at NTNU. The numerical results indicate that icing morphology has a major influence on the ability of both codes to capture ice shape and aerodynamic penalties. Rime is simulated consistently, whereas predictions for mixed and glaze show significant differences. All ice cases negatively impact the aerodynamic performance by reducing maximum lift, decreasing stall angle and increasing drag.","PeriodicalId":419456,"journal":{"name":"2018 Atmospheric and Space Environments Conference","volume":"3 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":"123641640","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: 21

Update on the NASA Glenn Propulsion Systems Lab Icing and Ice Crystal Cloud Characterization - 2017 更新美国宇航局格伦推进系统实验室结冰和冰晶云表征- 2017

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-3969

J. V. Zante, T. Ratvasky, T. Bencic, Clark C. Challis, Emily N. Timko, Mark R. Woike

引用次数: 8

An extended rough-wall model for an integral boundary layer model intended for ice accretion calculations 用于冰吸积计算的积分边界层模型的扩展粗壁模型

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-24 DOI: 10.2514/6.2018-2858

E. Radenac, A. Kontogiannis, Charlotte Bayeux, P. Villedieu

引用次数: 14

Weber Number Tests in the NASA Icing Research Tunnel NASA结冰研究隧道韦伯数测试

2018 Atmospheric and Space Environments Conference Pub Date : 2018-06-23 DOI: 10.2514/6.2018-3184

M. King, W. Bachalo, D. Bell, Laura-Cheri King-Steen

引用次数: 5

Ice accretion on a NACA 23012 airfoil NACA 23012机翼上的冰积

2018 Atmospheric and Space Environments Conference Pub Date : 2017-06-05 DOI: 10.2514/6.2017-3760

E. Oztekin, J. Riley

引用次数: 4