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Madlener, Klaus and Ciezki, Helmut (2005) Analytical Description of the Flow Behavior of Extended Herschel-Bulkley Fluids with Regard to Gel Propellants. In: Energetic Materials - Performance und Safety, 186-1-186-13. 36th International Annual Conferece of ICT, 2005-06-28 - 2005-07-01, Karlsruhe (Germany). ISSN 0722-4087.
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Abstract
Gel propellants are shear-thinning fluids, which have in many cases a distinct yield stress at low shear rates and/or a constant viscosity at high shear rates. Their viscosity behavior can be described by an extended formulation of the Herschel-Bulkley equation with an additional term containing the theoretical constant viscosity value of the high shear rate range. In this paper the general equations of the flow behavior of fluids with an exponential factor n=0.5 are analytically derived for steady, fully developed and laminar flows through constant area tubes. Velocity profiles and shear rate distributions are shown for different fluids and boundary conditions also in comparison to the common Herschel-Bulkley approach. The shape of this Extended Herschel-Bulkley velocity profile depends upon a derived dimensionless number k<sub>HBE</sub> and the ratio of the yield stress to wall shear stress.
| Item URL in elib: | https://elib.dlr.de/50502/ | |||||||||
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| Document Type: | Conference or Workshop Item (Paper, Poster) | |||||||||
| Title: | Analytical Description of the Flow Behavior of Extended Herschel-Bulkley Fluids with Regard to Gel Propellants | |||||||||
| Authors: |
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| Date: | June 2005 | |||||||||
| Journal or Publication Title: | Energetic Materials - Performance und Safety | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| Page Range: | 186-1-186-13 | |||||||||
| Editors: |
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| ISSN: | 0722-4087 | |||||||||
| Status: | Published | |||||||||
| Keywords: | gelled fuels, gelled propellants, non-Newtonian fluid, flow properties, rheology | |||||||||
| Event Title: | 36th International Annual Conferece of ICT | |||||||||
| Event Location: | Karlsruhe (Germany) | |||||||||
| Event Type: | international Conference | |||||||||
| Event Dates: | 2005-06-28 - 2005-07-01 | |||||||||
| Organizer: | Fraunhofer-Institut für Chemische Technologie | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport (old) | |||||||||
| HGF - Program: | Aeronautics | |||||||||
| HGF - Program Themes: | Aircraft Research (old) | |||||||||
| DLR - Research area: | Aeronautics | |||||||||
| DLR - Program: | L AR - Aircraft Research | |||||||||
| DLR - Research theme (Project): | L - Military Technologies (old) | |||||||||
| Location: | Lampoldshausen | |||||||||
| Institutes and Institutions: | Institute of Space Propulsion > Technologie | |||||||||
| Deposited By: | Ciezki, Dr.-Ing. Helmut | |||||||||
| Deposited On: | 07 Aug 2007 | |||||||||
| Last Modified: | 27 Apr 2009 14:10 |
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