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Characterization of a Free-Molecular Pressure Probe employing Gas-Kinetic Simulation

Grabe, Martin and Dettleff, Georg and Boettcher, Rolf-Detlef and Hannemann, Klaus (2010) Characterization of a Free-Molecular Pressure Probe employing Gas-Kinetic Simulation. 17. DGLR-Fachsymposium der STAB, 09.-10. Nov. 2010, Berlin, Deutschland.

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Free-molecular pressure probes are employed to deduce particle flux in highly rarefied flow fields, such as the farfield or the backflow region of a plume expanding into vacuum. Analytical approaches to model the probe behavior are known in the literature for some time now. Numerical methods such as DSMC however allow to conduct investigations into the probe response in regimes inaccessible to analytical approaches. Besides, the numerical results may be compared to theoretical models in order to test their fidelity. We computed the response of a probe with slot orifice to a highly rarefied, parallel flow with varying molecular speed ratio. We confirmed the negligible influence of the speed ratio on probe response for low angles of attack, but observed significant deviations from theory as the angle of attack approaches 90°.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Characterization of a Free-Molecular Pressure Probe employing Gas-Kinetic Simulation
AuthorsInstitution or Email of Authors
Grabe, Martinmartin.grabe@dlr.de
Dettleff, Georggeorg.dettleff@dlr.de
Boettcher, Rolf-Detlefrolf.boettcher@dlr.de
Hannemann, Klausklaus.hannemann@dlr.de
Refereed publication:No
In ISI Web of Science:No
Volume:STAB M
Page Range:pp. 62-63
Series Name:STAB Jahresbericht 2010
Keywords:Free-molecule flow, pressure probe, Patterson probe, rarefied flow, DSMC
Event Title:17. DGLR-Fachsymposium der STAB
Event Location:Berlin, Deutschland
Event Type:national Conference
Event Dates:09.-10. Nov. 2010
Organizer:DGLR, STAB
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Raumfahrzeugsysteme - Anlagen u. Messtechnik (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Martin Grabe
Deposited On:18 Apr 2011 13:16
Last Modified:12 Dec 2013 21:05

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