Modeling of Thermal Perturbations Using Raytracing Method with Preliminary Results for a Test Case Model of the Pioneer 10/11 Radioisotopic Thermal Generators
Rievers, B. and Lämmerzahl, C. and Dittus, H. (2010) Modeling of Thermal Perturbations Using Raytracing Method with Preliminary Results for a Test Case Model of the Pioneer 10/11 Radioisotopic Thermal Generators. Space Science Reviews. Springer-Science+Business Media B.V.. DOI: 10.1007/s11214-009-9594-6. ISSN 1572-9672 (Online).
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Electromagnetic radiation emitted from a source carries momentum. Thus, the dissipation of waste thermal energy can produce disturbance forces on spacecraft surfaces if the energy is not dissipated in a symmetric pattern. This force can be computed for a plate element as the quotient of the radiated power in normal direction and the speed of light. Depending on mission and spacecraft design the resulting surface forces have to be included into the disturbance budget. At ZARM an elaborated method for the exact modeling of the disturbances caused by heat radiation was developed which can be used for any satellite mission with high requirements on perturbation knowledge (e.g. LISA, LISA pathfinder, MICROSCOPE). The method which will be presented in this paper is based on raytracing and finite element (FE) thermal analysis. As a demonstration of the potential of the method, preliminary results acquired with a test case model of the Pioneer 10/11 Radioisotopic Thermal Generators (RTGs) will be shown.
|Title:||Modeling of Thermal Perturbations Using Raytracing Method with Preliminary Results for a Test Case Model of the Pioneer 10/11 Radioisotopic Thermal Generators|
|Date:||06 January 2010|
|Journal or Publication Title:||Space Science Reviews|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Publisher:||Springer-Science+Business Media B.V.|
|Keywords:||Disturbance modeling, Heat dissipation, FEM|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W - no assignement|
|DLR - Research area:||Space|
|DLR - Program:||W - no assignement|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Institute of Space Systems|
|Deposited By:||Prof.Dr. Hansjörg Dittus|
|Deposited On:||10 Mar 2010 12:47|
|Last Modified:||07 Feb 2013 20:44|
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