Transient Response Program
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Foundation ::
Engineering Applications ::
Transient Response Program
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Transient Response Program
Transient Response of Ablating Axisymmetric Bodies including the Effects of Shape Change
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Moderators:
Adopt This Application!
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SOURCE CODE AVAILABLE
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Transient Response Program has been developed to analyze the transient response of
an ablating axisymmetric body, including the effect of shape change. The
governing differential equation, the boundary conditions for the analysis on
which the computer program is based, and the method of solution of the
resulting finite-difference equations are discussed in the documentation.
Some of the features of the analysis and the associated program are
- the
ablation material is considered to be orthotropic with temperature dependent
thermal properties;
- the thermal response of the entire body is
considered simultaneously;
- the heat transfer and pressure distribution
over the body are adjusted to the new geometry as ablation occurs;
- the
governing equations and several boundary-condition options are formulated in
terms of generalized orthogonal coordinates for fixed points in a moving
coordinate system;
- the finite-difference equations are solved
implicitly; and
- other instantaneous body shapes can be displayed with a
user-supplied plotting routine.
The physical problem to be modeled with the analysis is described by FORTRAN
input variables. For example, the external body geometry is described in the
W, Z coordinates; material density is given; and the stagnation cold-wall
heating rate is given in a time-dependent array.
Other input variables are
required which control the solution, specify boundary conditions, and
determine output from the program. The equations have been programmed so
that either the International System of Units or the U. S. Customary Units
may be used.
Transient Reponse Program carries the NASA case number LAR-11049. It was originally released as part of the NASA COSMIC collection.
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