Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.)最新文献_第10页

Characterization of Independent Aerodynamic Effects of Tail-Fin Deflections on an Axisymmetric Body 轴对称体尾翼偏转独立气动效应的表征

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-1994

C. Mai, D. Dawson, Rajan Kumar, Simon Kirby, T. Birch

引用次数: 0

Effect of Airfoil-Preserved Undulations on Wing Performance 保留翼型的波动对机翼性能的影响

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-1784

Faith A. Loughnane, Rachael Supina, Michael P. Mongin, Sidaard Gunasekaran

{"title":"Effect of Airfoil-Preserved Undulations on Wing Performance","authors":"Faith A. Loughnane, Rachael Supina, Michael P. Mongin, Sidaard Gunasekaran","doi":"10.2514/6.2020-1784","DOIUrl":"https://doi.org/10.2514/6.2020-1784","url":null,"abstract":"The effect of undulation placement (leading edge, trailing edge, leading and trailing edge) on the wing performance and the wingtip vortex was investigated. Experiments were performed at the University of Dayton Low Speed Wind Tunnel (UD-LSWT) on undulated wings where the NACA 0012 airfoil crosssection is preserved along the wingspan. Sensitivity studies were done on the undulation wavelength along the span (λ/c 0.31, 0.21 and 0.15) and undulation placement (leading edge, trailing edge, and both leading and trailing edge). The leading edge undulations delayed stall until higher angles of attack, however, the maximum aerodynamic efficiency was reduced. The trailing edge undulated wing on the other hand increased the maximum aerodynamic efficiency but was not successful in stall mitigation. Wings with both leading and trailing edge undulations showed improvement in aerodynamic efficiency as well as delayed stall. The effect of the undulations on the wingtip vortex was also investigated through Particle Image Velocimetry (PIV). For the same coefficient of lift, the undulated wing cases reduced the wingtip vortex circulation by 25%. Investigations into the wingtip vortex core RMS and aerodynamic efficiency revealed a direct relationship where a higher vortex core RMS resulted in a higher aerodynamic efficiency and viceversa. Dedication or Acknowledgements The author acknowledges the partial funding from Henry Luce Foundation through the Clare Boothe Luce Scholars Program for the work presented in this thesis. The author would also like to acknowledge the Ohio Space Grant Consortium (OSGC) for partially funding the primary author for performing undergraduate research. The author would also like to thank UD wind tunnel technician, Jielong Cai, and research partner, Michael Mongin, for helping with manufacturing wind tunnel models and performing experiments.","PeriodicalId":93413,"journal":{"name":"Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.)","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90480549","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

Impact-Geometry Maps; Visualization of Kinetic Impact Effectiveness for Asteroid Deflection Missions Impact-Geometry地图;小行星偏转任务的动力学撞击效果可视化

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-0224

K. Yamaguchi, R. Hayama, Kikuko Miyata, S. Hara

引用次数: 0

Application of Non-Linear Harmonic and Time Marching techniques to analyze aerodynamics of inlet distortion in a Tail-Cone Thruster Fan stage 应用非线性谐波和时间推进技术分析尾锥推力器风扇级进气道畸变气动特性

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-0385

Ritangshu Giri, M. Turner, M. Celestina

引用次数: 0

Mission-Oriented Additive Manufacturing of Modular Mini-UAVs 面向任务的模块化微型无人机增材制造

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-0064

M. Bronz, E. Tal, F. Favalli, S. Karaman

{"title":"Mission-Oriented Additive Manufacturing of Modular Mini-UAVs","authors":"M. Bronz, E. Tal, F. Favalli, S. Karaman","doi":"10.2514/6.2020-0064","DOIUrl":"https://doi.org/10.2514/6.2020-0064","url":null,"abstract":"Recent developments in fast additive manufacturing, such as rapid 3D printing of composite materials, present opportunities for the manufacturing of small unmanned aerial vehicles (UAVs) that are tailor-made for the speciﬁc mission needs. This paper presents a novel framework for mission-oriented, modular design and construction of mini-UAVs using additive manufacturing. The outcome is a manufacturing method which is suitable for a parametric design that can be tailored for speciﬁc mission requirements, and rapidly constructed using additive manufacturing techniques. We show how additive manufacturing enables an agile design methodology by allowing fast and eﬃcient iteration of prototypes during the design process. The proposed framework is demonstrated by the design of a tail-sitter hybrid VTOL vehicle, for which wing-tip geometry and wing dihedral angle were optimized over several iterations of rapid prototyping. Additionally, we present a ﬂight performance validation of the resulting vehicle design through ﬂight tests in a motion capture facility and outdoors. Finally we show several other vehicle conﬁgurations, such as quadrotors and a ﬁxed-wing aircraft, that also take advantage of the proposed design and manufacturing methods.","PeriodicalId":93413,"journal":{"name":"Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.)","volume":"2003 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86248733","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: 6

Overview of a Generalized Numerical Predictor-Corrector Targeting Guidance with Application to Human-Scale Mars Entry, Descent, and Landing 广义数值预测校正瞄准制导在人尺度火星进入、下降和着陆中的应用综述

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-0846

R. Lugo, R. Powell, A. Dwyer-Cianciolo

引用次数: 11

Supplementing Haptic Feedback Through the Visual Display of Flight Envelope Boundaries 通过飞行包络边界的视觉显示补充触觉反馈

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-0373

G. D. Rooij, D. V. Baelen, C. Borst, M. V. Paassen, M. Mulder

{"title":"Supplementing Haptic Feedback Through the Visual Display of Flight Envelope Boundaries","authors":"G. D. Rooij, D. V. Baelen, C. Borst, M. V. Paassen, M. Mulder","doi":"10.2514/6.2020-0373","DOIUrl":"https://doi.org/10.2514/6.2020-0373","url":null,"abstract":"This paper describes the design and evaluation of a visual display in supplementing haptic feedback on the side stick as a way to communicate flight envelope boundaries to pilots. The design adds indications for the limits in airspeed, load factor, angle of attack and angle of bank to a standard Airbus primary flight display (PFD). The indications not only show the limits of the flight envelope, but also indicate magnitude and direction of the haptic cues. Fifteen professional Airbus pilots and one Airbus sim instructor participated in an experiment in the SIMONA Research Simulator at Delft University of Technology. Several approaches in three different scenarios were flown in alternate law with the old and new PFD, while haptic feedback was always enabled. Objective results do not show clear improvements with the new display, although the time spent outside the flight envelope is slightly reduced. Subjective results indicate a preference, however, for the new display and an increased understanding of the haptic feedback. Further research is recommended to focus on improving the design by removing unused indications and setting up an experiment with a bank scenario that allows the use of operational bank limits rather than artificially reduced limits.","PeriodicalId":93413,"journal":{"name":"Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.)","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86176959","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: 2

Receptivity to synthetic jet actuation in boundary layer flows 边界层流动中对合成射流驱动的接受性

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-0099

A. Palumbo, Onofrio Semeraro, J. Robinet, L. Luca

引用次数: 1

Database-driven Safe Flight Envelope Protection for Impaired Aircraft 数据库驱动的受损飞机安全飞行包线保护

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-1374

Yong Zhang, Yamin Huang, Q. Chu, C. C. Visser

引用次数: 3

Attitude Control of an Underactuated Planar Multibody System Using Momentum Preserving Internal Torques 欠驱动平面多体系统的保动量内力矩姿态控制

Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.) Pub Date : 2020-01-05 DOI: 10.2514/6.2020-1686

Federico Trovarelli, M. McRobb, Zhongxu Hu, C. McInnes

{"title":"Attitude Control of an Underactuated Planar Multibody System Using Momentum Preserving Internal Torques","authors":"Federico Trovarelli, M. McRobb, Zhongxu Hu, C. McInnes","doi":"10.2514/6.2020-1686","DOIUrl":"https://doi.org/10.2514/6.2020-1686","url":null,"abstract":"In the last few years interest in versatile reconfigurable arrays for space applications has been growing and several concepts tailored for different mission needs have been proposed. Nevertheless, a compelling application that justifies their higher cost and complexity with respect to conventional systemshas not yet been found. Here a novel approach to the design of an Attitude Control System (ACS) for small reconfigurable spacecraft is proposed. It shall exploit momentum-preserving internal torques generated by the modules of the multibody array rotating relative to each other. The goal is to achieve better performance in efficiency, accuracy and robustness with respect to state-of-the-art ACSs, which is a bottleneck of small spacecraft technology. This paper investigates the characteristic behaviour of a planar multibody array whose attitude is controlled using internal joint torques. To do this, relevant reorientation trajectories are shown and discussed. With respect to previous work in the field, optimal attitude control trajectories that take into account module impingement are discussed and the dynamics of momentum-preserving manoeuvres is explained in detail from both physical and mathematical points of view. The results demonstrate that further development of the concept is desirable.","PeriodicalId":93413,"journal":{"name":"Applied aerodynamics : papers presented at the AIAA SciTech Forum and Exposition 2020 : Orlando, Florida, USA, 6-10 January 2020. AIAA SciTech Forum and Exposition (2020 : Orlando, Fla.)","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85880999","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: 2