Abstract The space environment has high vacuum, rapid temperature alternations and other extreme conditions, which can affect the energy, ignition rate performance of solid propellants in environment. In order to obtain aging HTPB propellant, this paper investigates propellant vacuum compares it with atmospheric pressure, analyses oxidative cross-linking, degradation chain scission “dehumidific...

Facile ligand substitution is observed when the ruthenium-azide complex, [RuN(3)(Tp)(PPh(3))(2)] [Tp,HB(pz)(3), pz = pyrazol-yl, PPh(3) = triphenyl-phosphine] is treated with benzo-nitrile, yielding the title compound, [Ru(C(9)H(10)BN(6))(N(3))(C(7)H(5)N)(C(18)H(15)P)]. The asymmetric unit contains two crystallographically independent mol-ecules. In each one, the Ru(II) atom is six-coordinated ...

Recent experimentation has provided a more thorough understanding of the explosive response of class 1.3 composite propellant to severe impact. This study looked at an 88% total solids HTPB/Al/AP propellant similar to what could be used in space launch boosters. The program tested propellant charges as large as 22 inches in diameter. It includes hydrodynamic modeling for developing a basic unde...

A spectrometer system was constructed for measurement of transient species in flames by absorption of ultraviolet radiation. The output of a xenon arc lamp was used as the source of radiation, which was focused through the flame and onto a monochromator equipped with an intensified silicon diode array detector. The system was used to measure absorption by hydroxyl (OH) radical around 306 nm in ...

The introduction of micro-spacecraft in the space industry has led to the development of various micro-propulsion techniques. Microthrusters are micropropulsion devices used in microspacecraft for precise station keeping, orbit adjustment, attitude control, drag compensation and apogee kicking. The principle of operation of a solid propellant thruster is based on the combustion of a solid energ...

Metal-based nanofillers are used as disperssants to enhance thermal conductivity for a minimal fuel requirement extract maximum energy. To achieve this, metal-based must be suspended uniformly into jet so that desired propulsive characteristics can achieved. However, the dispersion of is critical challenge due density and viscosity independent parameters with scattered relation. Hence, in curre...