Computational Analysis of Planned High-Speed Swept Wing-Elevon Experiments

2022 ◽  
Author(s):  
Robert Alviani ◽  
Gregory A. Blaisdell ◽  
Jonathan Poggie
Keyword(s):  
High Speed ◽  
Computational Analysis ◽  
Swept Wing

Stationary cross-flow breakdown in a high-speed swept-wing boundary layer

2021 ◽  
Vol 33 (2) ◽  
pp. 024108
Author(s):  
Jianqiang Chen ◽  
Siwei Dong ◽  
Xi Chen ◽  
Xianxu Yuan ◽  
Guoliang Xu
Keyword(s):  
Boundary Layer ◽  
High Speed ◽  
Cross Flow ◽  
Swept Wing

scholarly journals Capillary transfer of soft films

2020 ◽  
Vol 117 (10) ◽  
pp. 5210-5216 ◽  
Author(s):  
Yue Zhang ◽  
Mengtian Yin ◽  
Yongmin Baek ◽  
Kyusang Lee ◽  
Giovanni Zangari ◽  
...  
Keyword(s):  
High Speed ◽  
Computational Analysis ◽  
Liquid Surface ◽  
Theoretical Models ◽  
Dynamic Contact ◽  
Surface Wetting ◽  
Motion Direction ◽  
Wetting Properties ◽  
Geometric Patterns ◽  
Solid Substrates

Existing transfer technologies in the construction of film-based electronics and devices are deeply established in the framework of native solid substrates. Here, we report a capillary approach that enables a fast, robust, and reliable transfer of soft films from liquid in a defect-free manner. This capillary transfer is underpinned by the transfer front of dynamic contact among receiver substrate, liquid, and film, and can be well controlled by a selectable motion direction of receiver substrates at a high speed. We demonstrate in extensive experiments, together with theoretical models and computational analysis, the robust capabilities of the capillary transfer using a versatile set of soft films with a broad material diversity of both film and liquid, surface-wetting properties, and complex geometric patterns of soft films onto various solid substrates in a deterministic manner.

scholarly journals Numerical Investigation into Flutter and Flutter-Buffet Phenomena for a Swept Wing and a Curved Planform Wing

2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Mario Rosario Chiarelli ◽  
Salvatore Bonomo
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
High Speed ◽  
Sensitivity Study ◽  
Fuel Saving ◽  
Swept Wing ◽  
Instability Condition ◽  
Aspect Ratios ◽  
Numerical Studies ◽  
Classical Flutter

The results of numerical studies carried out on high-aspect-ratio wings with different planforms are discussed: the transonic regime is analysed for a swept wing and a curved planform wing. The wings have similar aspect ratios and similar aerodynamic profiles. The analyses were carried out by CFD and FE techniques, and the reliability of the numerical aerodynamic results was proven by a sensitivity study. Analysing the performances of the two wings demonstrated that in transonic flight conditions, a noticeable drag reduction can be obtained by adopting a curved planform wing. In addition, for such a wing, the aeroelastic instability condition, consisting in a classical flutter, is postponed compared to a conventional swept wing, for which a flutter-buffet instability occurs. In a preliminary manner, the study shows that, for a curved planform wing, the high speed buffet is not an issue and at the same time notable fuel saving can be achieved.

Experimental and Computational Analysis to Reduce the Noise in High-speed Train

2004 ◽  
Vol 2004.14 (0) ◽  
pp. 96-99
Author(s):  
Daisuke MUTO ◽  
Katsutoshi HORIHATA ◽  
Kazuhiro MAKINO ◽  
Masahiko HORIUCHI ◽  
Katsufumi HASHIMOTO ◽  
...  
Keyword(s):  
High Speed ◽  
Computational Analysis ◽  
High Speed Train

scholarly journals Computational Analysis of Movement Patterns of Dogs with ADHD-Like Behavior

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1140
Author(s):  
Stephane Bleuer-Elsner ◽  
Anna Zamansky ◽  
Asaf Fux ◽  
Dmitry Kaplun ◽  
Sergey Romanov ◽  
...  
Keyword(s):  
Behavioral Problems ◽  
High Speed ◽  
Computational Analysis ◽  
Objective Assessment ◽  
Movement Patterns ◽  
Video Data ◽  
Three Dimensions ◽  
Control Group ◽  
Hyperactivity Disorder ◽  
Movement Parameters

Computational approaches were called for to address the challenges of more objective behavior assessment which would be less reliant on owner reports. This study aims to use computational analysis for investigating a hypothesis that dogs with ADHD-like (attention deficit hyperactivity disorder) behavior exhibit characteristic movement patterns directly observable during veterinary consultation. Behavioral consultations of 12 dogs medically treated due to ADHD-like behavior were recorded, as well as of a control group of 12 dogs with no reported behavioral problems. Computational analysis with a self-developed tool based on computer vision and machine learning was performed, analyzing 12 movement parameters that can be extracted from automatic dog tracking data. Significant differences in seven movement parameters were found, which led to the identification of three dimensions of movement patterns which may be instrumental for more objective assessment of ADHD-like behavior by clinicians, while being directly observable during consultation. These include (i) high speed, (ii) large coverage of space, and (iii) constant re-orientation in space. Computational tools used on video data collected during consultation have the potential to support quantifiable assessment of ADHD-like behavior informed by the identified dimensions.

The Computational Analysis of Hanging-Weight Method Used in High Speed Rail

2011 ◽  
Vol 291-294 ◽  
pp. 1773-1778
Author(s):  
Hao Yu Wang ◽  
Hong Xiao ◽  
Bo Wen Hou
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Computational Analysis ◽  
Component Part ◽  
High Speed Rail ◽  
Deflection Measurement ◽  
Test Parameters ◽  
Weight Method ◽  
Deflection Test

This paper focuses on the feasibility of the hanging-weight method in bridge deflection test of high speed rail. Firstly, it explains principles and component part. And then it proposes steps to determine test parameters. Lastly, it demonstrates the feasibility and reliability of this method by numerical simulation. The result shows the hanging-weight method satisfies the precision of bridge deflection measurement in high speed rail.

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