Results 11 to 20 of about 21,974 (173)

Efficiency of aft diffusers in vacuum systems of test benches for high-altitude firing tests of low-thrust liquid rocket engines

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016
The article presents the results of calculations and experimental studies of a vacuum system with an aft diffuser for high-altitude firing tests of low-thrust liquid rocket engines.
R. N. Galperin, Yu. I. Gulyaev, Yu. S. Ivashin, V. E. Nigodjuk, V. V. Ryzhkov, A. V. Sulinov   +5 more
doaj   +3 more sources

Design, Manufacturing, and Testing Process of a Lab Scale Test Bench Hybrid Rocket Engine

Engineering, Technology & Applied Science Research, 2023
The current paper presents the architecture of a test bench for small (laboratory) scale hybrid rocket motors destined for teaching purposes. The sustainability of the proposed methodology is emphasized, as it addresses the development of small-scale hybrid rocket motor test benches, to be used either as didactic means for students or for research ...
Grigore Cican, Ionut Florian Popa, Adrian Nicolae Buturache, Andrei Iaroslav Hapenciuc   +3 more
openaire   +1 more source

The Cosmic Infrared Background Experiment (CIBER): A Sounding Rocket Payload to Study the Near Infrared Extragalactic Background Light [PDF]

, 2013
The Cosmic Infrared Background Experiment (CIBER) is a suite of four instruments designed to study the near infrared (IR) background light from above the Earth's atmosphere. The instrument package comprises two imaging telescopes designed to characterize
Arai, T., Battle, J., Bock, J., Cooray, A., Hristov, V., Keating, B., Kim, M. G., Lee, D. H., Levenson, L. R., Mason, P., Matsumoto, T., Matsuura, S., Nam, U. W., Renbarger, T., Sullivan, I., Suzuki, K., Tsumura, K., Wada, T., Zemcov, M.   +18 more
core   +1 more source

Passivity-based control for rocket launcher position servo system based on improved active disturbance rejection technology

Advances in Mechanical Engineering, 2018
In order to achieve high motion accuracy and better robustness of the rocket launcher position servo system driven by a permanent magnet synchronous motor, a passivity-based controller based on improved active disturbance rejection control is proposed in
Ronglin Wang, Baochun Lu, Yuanlong Hou, Qiang Gao   +3 more
doaj   +1 more source

Application and Comparison of Different Combustion Models of High Pressure LOX/CH4 Jet Flames

Energies, 2014
The present work focuses on the numerical modeling of combustion in liquid-propellant rocket engines. Pressure and temperature are well above thermodynamic critical points of both the propellants and then the reactants show liquid-like characteristics ...
Maria Grazia De Giorgi, Aldebara Sciolti, Antonio Ficarella   +2 more
doaj   +1 more source

Fiber-optic system for measuring large inclination angles of large-sized test benches for rocket, space and aviation technology

University proceedings. Volga region. Technical sciences, 2023
Background. Nowadays during modernization of domestic rocket-space and aviation equipment (RS and AT) special attention is paid to the accuracy of measurement of spatial position of large-size test stands. Design and technological parameters of RS and AE products depend on the accuracy of measuring the stand inclination angle.
T.I. Murashkina, E.A. Badeeva, M.V. Kuznetsova, A.N. Kukushkin, V.A. Badeev   +4 more
openaire   +2 more sources

A compact and robust diode laser system for atom interferometry on a sounding rocket

, 2016
We present a diode laser system optimized for laser cooling and atom interferometry with ultra-cold rubidium atoms aboard sounding rockets as an important milestone towards space-borne quantum sensors.
Braxmaier, C., Döringshoff, K., Grosse, J., Hellmig, O., Kohfeldt, A., Krutzik, M., Peters, A., Schkolnik, V., Sengstock, K., Wenzlawski, A., Wicht, A., Windpassinger, P.   +11 more
core   +1 more source

Design and development of a deployable self-inflating adaptive membrane [PDF]

, 2012
Space structures nowadays are often designed to serve just one objective during their mission life, examples include truss structures that are used as support structures, solar sails for propulsion or antennas for communication. Each and every single one
Crawley E. F., Fittock M., Galen C., Lücking C., Mangenot C., Simburger E. J., Sinn T., Straubel M., Wilson   +8 more
core   +1 more source

ORCHESTRATING DIFFERENCE AND SIMILARITY: Black Fungibility, and the Spatial Redrawing of Racial Categories in Spanish Colonial Morocco, Sahara and Guinea

International Journal of Urban and Regional Research, EarlyView.
Abstract In this article I dissect the spatial strategies through which the Spanish attempted to orchestrate both racial difference and similarity in the African colonies of Morocco, Western Sahara and Equatorial Guinea during the first half of the twentieth century.
Pol Fité Matamoros
wiley   +1 more source

Spectacle and Spy Stories: The 1954 Royal Commission on Espionage

Australian Journal of Politics &History, EarlyView.
ABSTRACT The Menzies government's 1954 royal commission, established to investigate Soviet espionage in Australia, is well known as the backdrop to the Labor Party split. It saw opposition leader H.V. Evatt's demise and ushered in an almost 20‐year period of Liberal Party governance.
Ebony Nilsson
wiley   +1 more source