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系列学术报告会通知(Prof. John A. Ekaterinaris)

来源:航空学院 作者:颜士轩 点击:429 发布时间:2019-05-08 08:50:18

报告人:Prof. John A. Ekaterinaris (associate editor of JPAS and editor in chief of AESCTE)

报告地点:明故宫校区18号楼529报告厅

主办单位:飞行器环境控制与生命保障工信部重点实验室、非定常空气动力学与流动控制工信部重点实验室、国际合作处、校科协、航空学院

报告题目1Simulations requirements of vortices generated from wings and hovering rotor blades ensuring accurate predictions

报告时间:517日(周五)上午9:00

报告内容简介:

Numerical simulations which were conducted to study the development and turbulent decay of delta wing leading edge vortices, wing tip vortices, dynamic stall vortices, and the helical tip vortices in the wake produced by a hovering rotor blade are presented. The key algorithmic features for accurate capturing and preservation of vorticity are identified. An extensive series of RANS calculations was performed and the results were compared to detailed dual-plane Particle Image Velocimetry (PIV) measurements of a turbulent tip vortex trailed from a single-bladed rotor. The required mesh resolution was investigated and the most suitable turbulence closure models with corrections for rotation and streamline curvature was chosen by assessing their predictions of the tip vortex properties that improve capturing of the overall nature of the rotor wake. It was found that even when using a higher-order spatial discretization scheme is employed, a minimum grid spacing equal was required to accurately predict the core size, peak swirl velocity and strength of the tip vortex. It was found that the rotational/curvature corrections applied to the Spalart-Allmaras turbulence model better preserved the vortex characteristics to later wake ages than the same corrections applied to the k-ω SST model. In both cases, the correction proposed by Spalart and Shur outperformed the simplified correction proposed by Dacles-Mariani et al., with the latter providing little impact on the k-ω SST model. However, despite the reasonable agreement of the mean quantities with the measurements poor predictions of the Reynolds stress distributions was obtained in all cases.

报告题目2How to prepare your manuscript for the Aerospace Science and Technology (AESCTE) and other Elsevier Journals in order to manage having quick and favorable review

报告时间:517日(周五)下午3:00

报告内容简介:

Aerospace Science and Technology (AESCTE) is a high quality Elsevier journal rating among the first in the field of Aerospace Engineering. In the last few years, the quality of the published articles, the impact factor of AESCTE, and as a result both the number of submissions and the number of rejections have been increased. The goal of this presentation is to provide background information on academic publishing in AESCTE. It outlines the various important steps that, as an Author, you need to follow in preparing your manuscript so that it becomes appealing to editors and reviewers, for going fast through the review process, and finally achieving a successful publication in AESCTE. It also aims to provide advice about how to properly structure your article in order to avoid as possible editorial comments that potentially delay or put serious obstacles to the publication of your work. From the title and keywords, right through to the conclusion and references, all the essential criteria are covered to make sure it can be a success. It goes without saying that the most important aspects for successful publication, which will make your work to distinguish among others and will accelerate the review and acceptance, are the innovative ideas it contains and the scientific value of your work. These elements will also lead to larger number of citations that will eventually befit you in the academic environment and in turn the AESCTE journal because they will contribute to further increase of the impact factor.

 

报告人简介:

Dr. John A. Ekaterinaris is associate editor of the Journal Progress in Aerospace Science (JPAS) and editor in chief of the Journal Aerospace Science and Technology (AESCTE). He received his B.S. in Electrical and Mechanical Engineering from the Aristotle University of Thessaloniki in Greece in 1977, and M.Sc. in Mechanical Engineering in 1982 and his Ph.D. from the School of Aerospace Engineering in 1987, both at the Georgia Institute of Technology, Atlanta GA.

Between 1987 – 1995, worked at NASA–Ames Research Center at Moffett Field CA, and at the same time he was faculty at the Naval Postgraduate Scholl at Monterey CA. He took a Senior Research Scientist position at RISOE National Laboratory in Denmark between 1995 – 1997 where he worked on wind energy, he returned to CA and worked at Nielsen Engineering and Research (NEAR) between 1997 – 2000.

In Oct. 2000 he took the Research Director position at FORTH/IACM, where he remained until 2005. In Sept. 2005 he joined the faculty of Mechanical and Aerospace Engineering at the University of Patras. He joined the faculty of Embry-Riddle Aeronautical University in August 2012 where he is currently teaching and performing research.

His interests are computational mechanics (including aerodynamics, magnetogasdynamics, electromagnetics, aeroacoustics, flow transition, turbulence research, and flow structure interaction), high order methods for PDEs, multiscale phenomena, stochastic PDEs, and biomechanics and more recently machine learning and uncertainty quantifcation. He is author of over 60 journal papers. He has been member American Institute of Aeronautics and Astronautics (AIAA), where he served as member at the Flight Mechanics and Fluid Dynamics Technical Committees, and AIAA associate fellow of since 1985. He performed funded research in the US and in Europe with the European Space Agency (ESA), and through the EU framework programs. He also performed funded research thought the offices of AFOSR and ARO.

 

 

 

 

 

 

 

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