Results 11 to 20 of about 29,920 (238)

COMBUSTION PROCESSES IN HYBRID ROCKETS

open access: yesInternational Journal of Energetic Materials and Chemical Propulsion, 2019
This paper presents the latest results achieved at the Space Propulsion Laboratory of Politecnico di Milano in the area of hybrid propulsion. Focus is put on four specific research topics currently under investigation and strongly linked: (1) solid fuel formulations development; (2) investigation of the burning behavior of liquefying fuel formulations ...
Paravan, Christian   +3 more
openaire   +1 more source

A Phenomenological Model for the Unsteady Combustion of Solid Propellants from a Zel’dovich-Novzhilov Approach

open access: yesAerospace, 2023
Solid rocket motors are prone to combustion instabilities, which may lead to various problems for the rockets, from unexpected oscillations, precision decreasing, to explosion.
Zhuopu Wang, Wenchao Zhang, Yuanzhe Liu
doaj   +1 more source

Regarding the perturbed operating process of DB propellant rocket motor at extreme initial grain temperatures [PDF]

open access: yesINCAS Bulletin, 2012
Despite many decades of study, the combustion instability of several DB propellants is still of particular concern, especially at extreme grain temperature conditions of rocket motor operating.
Ioan ION, Titica VASILE, Doru SAFTA
doaj   +1 more source

Solid-Fuel Regression Rate for Standard-Flow Hybrid Rocket Motors

open access: yesJournal of Thermal Science and Technology, 2012
Marxman's diffusion-limited analysis of hybrid rocket combustion has been often used to investigate various combustion problems in hybrid rocket motors.
Takakazu MORITA   +3 more
doaj   +1 more source

Numerical Investigation on Hybrid Rocket Motors with Star-Segmented Rotation Grain

open access: yesAerospace, 2022
A novel fuel grain configuration comprising two star-segmented grains is proposed. The effect of the rotation, mid-chamber length, and segmented position on the fuel regression rate and the combustion efficiency in hybrid rocket motors with star ...
Hui Tian   +5 more
doaj   +1 more source

Servo-Stabilization of Low-Frequency Oscillations in a Liquid Bipropellant Rocket Motor [PDF]

open access: yes, 1953
The recent work of H. S. Tsien concerning the servostabilization of rocket motors is extended to the liquid bipropellant rocket motor. It is shown that by use of a feedback system containing a device to sense the combustion chamber pressure, a suitably ...
Cox, Dale W., Jr., Marble, Frank E.
core   +1 more source

Ignition and Flame Stabilization of a Strut-Jet RBCC Combustor with Small Rocket Exhaust

open access: yesThe Scientific World Journal, 2014
A Rocket Based Combined Cycle combustor model is tested at a ground direct connected rig to investigate the flame holding characteristics with a small rocket exhaust using liquid kerosene.
Jichao Hu, Juntao Chang, Wen Bao
doaj   +1 more source

Agglomerate Size Evolution in Solid Propellant Combustion under High Pressure

open access: yesAerospace, 2023
Solid propellant combustion and flow are significantly affected by condensed combustion products (CCPs) in solid rocket motors. A new aluminum agglomeration model is established using the discrete element method, considering the burning rate and ...
Songchen Yue   +7 more
doaj   +1 more source

Rocket Motor with Composite Casing [PDF]

open access: yesProblemy Mechatroniki, 2015
The article presents the results of work concerning a two-stage rocket motor. In the first step tested stationary the charge rocket motor with the ignitor and the nozzle system in the ballistic chamber was tested.
Zbigniew Drabik, Tomasz Rasztabiga
doaj   +1 more source

Analysis of importance priority to be studied on igniter system of 450 caliber X rocket

open access: yesDefense and Security Studies, 2022
A rocket is a flying platform that gets energy from the combustion process that performs a thrust that is large enough to reach hypersonic speed. It becomes quite vital considering the speed of the combustion process in double configuration propellant ...
A. Zaldiansyah   +3 more
doaj   +1 more source

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