Magsail_MHD_and_kinematic_model_effective_sail_area.jpg
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Summary
Description Magsail MHD and kinematic model effective sail area.jpg |
English:
The figure plots the normalized effective sail area normalized by the coil area
for the Magsail kinematic model (MKM) from Gros
and for Zubrin
for loop current
a curve fit parameter plotted versus the spacecraft velocity relative to the speed of light
assuming an Interstellar medium (ISM) plasma density of 1.7x10
-22
. Also plotted is the MHD applicability test of ion gyroradius divided by magnetopause radius
< 1 on the secondary axis. Note that MHD applicability occurs at
< 1%. For comparison, the 2004 Fujita
model as a function of
from the MHD applicability test section of the magnetic sail article is also plotted. Note that the Gros model predicts a more rapid decrease in effective area than this model. The normalized values of
and
track closely until
10% after which point the Zubrin magsail model becomes increasingly optimistic and the MKM model is applicable instead. Since the models track closely up to
10%, with the kinematic model underestimating effective sail area only for small values of
(hence underestimating force),the MKM model is a good approximation for predicting generation of force both the MHD and kinematic region.
|
Date | |
Source | Own work |
Author | Dmcdysan |
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