Estimation of Flow Properties of Gelled Fuels with Regard to Propulsion Systems
Madlener, Klaus and Ciezki, Helmut (2012) Estimation of Flow Properties of Gelled Fuels with Regard to Propulsion Systems. Journal of Propulsion and Power, Vol. 28 (No. 1), pp. 113-121. DOI: 10.2514/1.50422.
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Gelled fuels and propellants are shear-thinning non-Newtonian fluids. Their dependency of the shear viscosity from the shear rate can be described with sufficient accuracy by an extended version of the Herschel-Bulkley equation in the whole rocket and ramjet propulsion-relevant shear-rate range. Additionally to the analytically determined generalized Reynolds number for fluids, which follow the extended Herschel-Bulkley equation, a method for the estimation of critical Reynolds numbers (as a phenomenological approach) is presented. Both dimensionless numbers are useful for the characterization of the flow and partially also of the spray processes of gel fluids. The results show furthermore that both the shear-thinning property and the yield stress tend to stabilize the laminar flow and thus shift the critical Reynolds number to higher values when compared to Newtonian liquids.
|Title:||Estimation of Flow Properties of Gelled Fuels with Regard to Propulsion Systems|
|Journal or Publication Title:||Journal of Propulsion and Power|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 113-121|
|Keywords:||Gelled Fuels, Propulsion Systems|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Raumfahrt|
|HGF - Program Themes:||R RP - Raumtransport|
|DLR - Research area:||Raumfahrt|
|DLR - Program:||R RP - Raumtransport|
|DLR - Research theme (Project):||R - Antriebsystemtechnik - Schubkammertechnologie|
|Institutes and Institutions:||Institute of Space Propulsion > Treibstoffe|
|Deposited By:||Melanie Schmidt|
|Deposited On:||14 Mar 2012 08:52|
|Last Modified:||07 Feb 2013 20:34|
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