Results 11 to 20 of about 21,894 (183)

Numerical Investigation on the Thermal Behaviour of a LOx/LCH₄ Demonstrator Cooling System

Aerospace, 2021
Reliability of liquid rocket engines is strictly connected with the successful operation of cooling jackets, able to sustain the impressive operative conditions in terms of huge thermal and mechanical loads, generated in thrust chambers. Cryogenic fuels,
Daniele Ricci, Francesco Battista, Manrico Fragiacomo   +2 more
doaj   +1 more source

Experimental and Numerical Study of the Flammability Limits in a CH₄/O₂ Torch Ignition System

Energies, 2022
The current work is devoted to studying combustion initiation inside the methane-oxygen torch igniter for a hybrid rocket motor. The ignition system can generate a wide range of power and oxidizer-to-fuel ratios.
Olexiy Shynkarenko, Domenico Simone, Jungpyo Lee, Artur E. M. Bertoldi   +3 more
doaj   +1 more source

Study on the Service Performance of a Two-Stage Floating-Ring Isolation Seal for a High-Speed Turbopump with a Cryogenic Medium

Machines, 2023
The reliability and stability of the seal at the fuel-supply end of a rocket-engine turbopump are important factors in determining safety. Conventional single-stage floating rings used for the isolation-sealing of cryogenic media are highly susceptible ...
Zifeng Song, Shuangxi Li, Xiaozhu Chen, Zhiyuan Liu, Tan Zhao, Baiqi Huang   +5 more
doaj   +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

Cryogenic test bench for the experimental investigation of cryogenic injection in rocket combusters under high-altitude conditions

IOP Conference Series: Materials Science and Engineering, 2022
Abstract Due to current and future environmental and safety issues in space propulsion, typical propellants for upper stage or satellite rocket engines such as the toxic hydrazine are going to be replaced by green propellants like the combination of liquid oxygen and hydrogen or methane. The injection of that kind of cryogenic fluid into
Andreas Rees, Michael Oschwald
openaire   +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

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

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

The Cosmic Infrared Background Experiment (CIBER): Instrumentation and First Results [PDF]

, 2010
Ultraviolet emission from the first generation of stars in the Universe ionized the intergalactic medium in a process which was completed by z similar to 6; the wavelength of these photons has been redshifted by (1 + z) into the near infrared today and
Battle, J., Bock, J., Cooray, A., Hristov, V., Keating, B., Lee, D. H., Levenson, L., Mason, P., Matsumoto, T., Matsuura, S., Nam, U. W., Renbarger, T., Sullivan, I., Suzuki, K., Tsumura, K., Wada, T., Zemcov, M.   +16 more
core   +1 more source