Publicou 6 edições por ano
ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678
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IGNITION AND COMBUSTION STUDIES OF HETEROGENEOUS UDMH-RFNA GEL PROPELLANTS
RESUMO
Advanced gel propulsion systems are being designed and developed for use in volume-limited space vehicles and advanced missile interceptors where safety, energy management, high performance, and efficient packing are the main concerns. Gelled propellants utilized in such a propulsion device are very delicately balanced systems and exhibit a complex ignition, combustion, and rheological behavior. The ignition and combustion characteristics of such heterogeneous systems have to be precisely understood to design a suitable injector and combustion chamber of the rocket motor to achieve a desired level of performance and combustion efficiency. An experimental investigation on ignition and combustion characteristics of UDMH gelled with high-substitution methyl cellulose as fuel and RFNA as oxidant has been carried out with and without metal additives, using a conventional ignition-delay tester and a customized twin-jet combustor. The ignition and combustion behavior of the gelled systems injected through a single-element injector has also been investigated. Preignition, ignition, and postignition temperature profiles close to the impingement point of the respective jets in a specially designed twin-jet combustor have been recorded using a suitable thermocouple and precision recording system. It has been observed that gels show lower ignition delay than the parent hypergolic system, however, a marginal increase is recorded in the case of metalized systems. The rheological characterization of the fuel gel has been conducted in a wide range of shear rate (10−2−106 s−1) and it has been found to be thixotropic in nature with viscosity values drastically falling with shear rate.
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Jyoti Botchu V. S., Baek Seung Wook, Formulation and Comparative Study of Rheological Properties of Loaded and Unloaded Ethanol-Based Gel Propellants, Journal of Energetic Materials, 33, 2, 2015. Crossref
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Huh Jeongmoo, Jyoti Botchu V. S., Yun Yongtae, Shoaib M. N., Kwon Sejin, Preliminary Assessment of Hydrogen Peroxide Gel as an Oxidizer in a Catalyst Ignited Hybrid Thruster, International Journal of Aerospace Engineering, 2018, 2018. Crossref
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Moghaddam Ali Saberi, Rezaei Mohammad Reza, Tavangar Saeed, Experimental Investigation of Characteristic Length Influence on a Combustion Chamber Performance with Liquid and Gelled UDMH/IRFNA Bi‐Propellants, Propellants, Explosives, Pyrotechnics, 44, 9, 2019. Crossref