نتایج جستجو برای: aerospace propulsion

تعداد نتایج: 18151  

2012
M.A.S. Minucci

Currently, a new generation of scientific aerospace vehicles, using advanced hypersonic airbreathing propulsion based on supersonic combustion technology, is in development at several research centers [1]. The 14-X Brazilian Hypersonic Aerospace Vehicle, Figure 1, designed by Rolim et al. [2], at the Prof. Henry T. Nagamatsu Laboratory of Aerothermodynamics and Hypersonics, Figure 2, at the Ins...

2011
Robert J. Shaw

One of NASA's four main product lines is developing and transferring to U. S. industry enabling technologies required for next generation aerospace vehicles as part of the Aerospace Technology Enterprise. This paper overviews the Ultra Efficient Engine Technology (UEET) Program, NASA's focused aerospace propulsion technology program. The UEET Program emphasizes technology development in six sel...

Journal: :Journal of Physics: Conference Series 2017

Journal: :Propulsion and Power Research 2016

2008
David Hinkley

A Microelectromechanical System-based (MEMS) PICOSAT Inspector (MEPSI) picosatellite on STS-116, in December 2006, used a five thruster cold gas propulsion system to translate and rotate. The inspector picosatellite measured 4 x 4 x 5 inches in dimension and weighted 1.4 kg. Our propulsion system was produced by a unique (to spacecraft) method of manufacturing that is low cost, tightly integrat...

Journal: :Journal of Fluids Engineering 2019

2011
Franz J Meyer Junsu Kim Ramon Brcic Xiaoqing Pi

1) Geophysical Institute, University of Alaska Fairbanks, AK, 99775, USA; email: [email protected] 2) Microwaves and Radar Institute, German Aerospace Center (DLR), 82234 Wessling, Germany; email: [email protected] 3) Remote Sensing Technology Institute, German Aerospace Center (DLR), 82234 Wessling, Germany; email: [email protected] 4) Jet Propulsion Laboratory, California Institute of Tech...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی 1387

هدف از ارایه این پایان نامه بررسی و محاسبات نوترونی و ترمو هیدرولیک برای نمونه ای از راکتور مورد استفاده در پیشرانش فضایی به روش تحلیلی و مقایسه و بهینه سازی این محاسبات با نتایج حاصل از شبیه سازی همین قلب توسط کد mcnp می باشد. برای این منظور ابتداء انواع مختلف سیستم های پیرانش هسته ای مورد استفاده در پرتابه های فضایی را مورد بررسی قرار داده و نحوه عملکرد و کارایی آن ها را با یکدیگر مقایسه می ک...

2018
A Ferrero F Larocca

The flow fields which can be observed inside several components of aerospace propulsion systems are characterised by the presence of very localised phenomena (boundary layers, shock waves,...) which can deeply influence the performances of the system. In order to accurately evaluate these effects by means of Computational Fluid Dynamics (CFD) simulations, it is necessary to locally refine the c...

2007
Kristie Ogilvie Dimitris Assimakopoulos

This research examines results from a dual case study in defining a model for high productivity and performance of cross-functional development teams in an aerospace engineering community. More specifically it explores cohesiveness and team dynamics over an approximate 4-year period in a project team that recently designed and built a highly innovative propulsion system. The ‘successful’ team d...

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