1 Robert O. Lawton Distinguished Professor, Department of Mathematics, Fellow AIAA. 2 Post-Doctoral Research Associate, Department of Mathematics. 3 Research Scientist, Structural Acoustics Branch, Aerodynamics, Aerothermodynamics and Acoustics Competency, Member AIAA. 4 Senior Research Scientist, Computational Modeling and Simulation Branch, Aerodynamics, Aerothermodynamics and Acoustics Compe...

Abstract Prior to landing of reusable space transportation systems, the vehicle’s legs needs be fully deployed enable a safe and further re-use vehicle. During that phase deployment system has overcome harsh challenging environmental conditions. In this study, numerical simulator is developed in order investigate these influences on leg dynamics. By means an extensive aerodynamic database broad...

Race car performance depends on elements such as the engine, tires, suspension, road, aerodynamics, and of course the driver. In recent years, however, vehicle aerodynamics gained increased attention, mainly due to the utilization of the negative lift (downforce) principle, yielding several important performance improvements. This review briefly explains the significance of the aerodynamic down...

In order to ensure the full heat dissipation of exchangers, opening grille should be large, which increases wind drag whole vehicle. Most research on only focuses its impact engine compartment; there is little influence performance thermal management system, because it difficult solve real-time data interaction different dimensional models. So we established 1D and 3D strong coupling model. The...

This paper presents an analysis of the concept of Miniature Air Vehicles and Micro Air Vehicles (respectively mAV and μAV) mainly carried out through the development of a mAV prototype called "Bidule", which was first successfully flown in 1998. The final objective of the project is to reduce the size of this miniature demonstrator to a micro sized vehicle. This paper presents the initial work ...

Supersonic retropropulsion provides an option that can potentially enhance drag characteristics of high mass entry, descent, and landing systems. Preliminary flow field and vehicle aerodynamic characteristics have been found in wind tunnel experiments; however, these only cover specific vehicle configurations and freestream conditions. In order to generate useful aerodynamic data that can be us...

Title of dissertation: MODELING AND SYSTEM IDENTIFICATION OF AN ORNITHOPTER FLIGHT DYNAMICS MODEL Jared Grauer Doctor of Philosophy, 2012 Dissertation directed by: Langley Distinguished Professor James E. Hubbard, Jr. Department of Aerospace Engineering Ornithopters are robotic flight vehicles that employ flapping wings to generate lift and thrust forces in a manner that mimics avian flyers. At...

Nowadays, aerodynamics is a key focal point in the vehicle design process. Beyond its direct impact on performance of vehicle, it also has significant effects economics and safety. In last decade numerical methods, mainly Computational Fluid Dynamics (CFD), have established themselves as reliable tool that assists process complements classical tunnel tests. However, questions remain about possi...