Results 11 to 20 of about 7,227 (196)
Theoretical stress mechanism and structural integrity of viscoelastic propellant grains with variable Poisson’s ratio [PDF]
Scientific ReportsFor the propellant grain of solid rocket motors (SRMs) with circular inner surfaces, the generalized Maxwell model (GMM) and the generalized Kelvin–Voigt model (GKV) are used to characterize the relaxation properties of the grain’s elastic modulus and ...
Xueren Wang +5 more
doaj +2 more sources
Research on the influence of loading rate on the dynamic initiation fracture toughness of CMDB propellant [PDF]
Scientific ReportsIn the field of gun launched missile extended range rocket, the propellant grain in the rocket needs to withstand significant launch loads during their firing phase, and also bear the high pressure caused by ignition, and the impact of launch overloads ...
Jian Zheng +5 more
doaj +2 more sources
Aerospace, 2023 Fused deposition technology (FDM), as an additive manufacturing (AM) technology, holds immense potential in the field of solid grain manufacturing. It can accomplish complex grain shaping with ultra-low-pressure ratios, which are challenging to achieve ...
Shixiong Song +4 more
doaj +1 more source
Design of Multi-Propellant Star Grains for Solid Propellant Rockets
Defence Science Journal, 1980 A new approach to solve the geometry-problem of solid propellant star is presented. The basis of the approach is to take the web-thickness (a ballistic as well as a geometrical property) as the characteristic length. The nondimensional characteristic parameters representing diameter, length, slenderness-ratio, and ignitor accommodation of the grain are
S. Krishnan, Tarit K. Bose
openaire +1 more source
Optimum Disposition of Metal Particles in the Propellant Grain
International Journal of Aerospace Engineering, 2014 Using the dispersed metal in solid propellants to increase the temperature of combustion products leads to such a problem as the specific impulse loss due to the incomplete combustion of metal particles in the exhaust products.
Leonid L. Minkov +2 more
doaj +1 more source
International Journal of Aerospace Engineering, 2020 Unexpected pressure rise may occur in the end-burning grain solid rocket motor. It is generally believed that this phenomenon is caused by the nonparallel layer combustion of the burning surface, resulting in the increase of burning rate along the ...
Wei Xianggeng +5 more
doaj +1 more source
Analysis of pressure blips in aft-finocyl solid rocket motor [PDF]
, 2016 Ballistic anomalies have frequently occurred during the firing of several solid rocket motors (SRMs) (Inertial Upper Stage, Space Shuttle Redesigned SRM (RSRM) and Titan IV SRM Upgrade (SRMU)), producing even relevant and unexpected variations of the SRM
E., Cavallini +2 more
core +1 more source
Solving an irregular burning problem in a small rocket motor [PDF]
Scientific Technical Review, 2014 During the design and development of a solid rocket motor, intensive irregular burning appeared in the area of high initial temperatures. The cylindrical propellant grain was designed for approximately neutral burning, with a hollow tube and both burning
Gligorijević Nikola +5 more
doaj
Mitigation of slivers using a new propellant grain design to improve propulsion systems
Aviation, 2012 The research work addresses mathematical modelling and computational analysis of novel solid propellant grain configuration. The aviation industry is working on propulsion systems as well.
Sarah Farrukh, M. Bilal Khan
doaj +1 more source
Regarding the perturbed operating process of DB propellant rocket motor at extreme initial grain temperatures [PDF]
INCAS 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