Results 211 to 220 of about 953 (263)
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Performance of Two-Fluid Atomization of Gel Propellant
Journal of Propulsion and Power, 2022Two-fluid atomization of highly viscous and shear thinning non-Newtonian fluids must overcome the viscous resistance.
Manisha B. Padwal, Debi Prasad Mishra
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Rheological Matching of Gel Propellants
Journal of Propulsion and Power, 2010A SIGNIFICANT effort has been undertaken by several research groups worldwide over the past decades to study various aspects of gel propellants. The principal objective of these basic studies is to realize a flexible energy-management propulsion system,which assures insensitivemunitions compliance. In addition, their increased energy density, whenmetal
Shai Rahimi +2 more
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On Shear Rheology of Gel Propellants
Propellants, Explosives, Pyrotechnics, 2007AbstractSelected fuel, oxidizer and simulant gels were prepared and rheologically characterized using a rotational rheometer. For fuel gelation both organic and inorganic gellants were utilized, whereas oxidizers and simulants were gelled with addition of silica and polysaccharides, respectively.
Shai Rahimi +2 more
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Preparation and characterization of gel propellants and simulants
37th Joint Propulsion Conference and Exhibit, 2001Energetic gels were selected, prepared, characterized and tested for their feasibility as candidates for rocket propulsion and other gas generation systems. For fuel gellation both organic and inorganic gellants were considered. Oxidizers were gelled using inorganic gellants.
Shai Rahimi, Dov Hasan, Arie Peretz
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Mechanical Properties of Gel Propellants with Nanoparticles
Journal of Energetic Materials, 2004Gel propellants provide rocket propulsion systems of high specific impulse, low sensitivity, and low vulnerability in combination with the capability to control the thrust, that is, variation of thrust and thrust cutoff. The characterization of the mechanical properties is essential for the development of gel propellant formulations and for the design ...
U. TEIPEL, U. FOERTER-BARTH
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Investigation of the combustion process of gel propellants
33rd Joint Propulsion Conference and Exhibit, 1997The trend today in high energy long storage rocket fuel and propellants research is to develop combustion systems which introduce the use of gel fuels and propellants. The idea stems from the fact that the addition of gelling agents and/or metallized additives to the liquid fuels enhances significantly the performance, density and specific impulse of ...
Gad Nahamoni +3 more
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Injector Flow Characteristics for Gel Propellants
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011Computational and experimental efforts to investigate the injector flow characteristics for gel propellants are presented. Two different types of injectors are considered: a tapered tube and plain-orifice type. Paraffin/Thixatrol and Water/HPC Gels are used as working fluids and are modeled as a shear-thinning fluid.
Changjin Yoon +5 more
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THE STATUS OF GEL PROPELLANTS IN YEAR 2000
International Journal of Energetic Materials and Chemical Propulsion, 2002The present study is a review of the main aspects in gel propellants past and current research and development. The work deals with the following subjects: Historical background of gel propellants; Advantages of gel propellants in comparison to liquid and solid propellants: safety, performance, storage; Theoretical performance evaluation of different ...
Benveniste Natan, Shai Rahimi
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On Shear-Thinning Gel Propellants with Metal Powders
46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2010Gel propellants with metal powders can be modeled as suspensions of particles in a power-law fluid. The addition of the particles alters the rheological properties of the fluid. The power index n is of a particulate interest in propulsion applications, since it describes the degree of shear-thinning of the fluid.
Victor Chernov, Benveniste Natan
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On the flow of a bubble pair rising in temperature-sensitive gel propellants
Physics of Fluids, 2023The gel propellant is a novel type of propellant created by introducing gelling agents to the liquid propellant. Similar to other types of propellants, the occurrence of air bubbles in the gels is common and unavoidable during the manufacturing and casting process. The presence of bubbles can adversely impact the stable combustion of the engine and may
Qiang Li +5 more
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