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fix: seed FAC supersonic-area-ratio Newton iteration from throat gamma_s #139

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fix: seed FAC supersonic-area-ratio Newton iteration from throat gamma_s #139

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4 changes: 2 additions & 2 deletions source/rocket.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -893,7 +893,7 @@ subroutine RocketSolver_solve_supar(self, soln, idx, pc, supar, h_inf, s0, weigh
if (supar(i) < 2.0d0) then
ln_pinf_pe = ln_pinf_pt + sqrt(3.294d0*(log(supar(i))**2.0d0) + 1.535d0*log(supar(i)))
else if (supar(i) >= 2.0d0) then
ln_pinf_pe = soln%eq_partials(2)%gamma_s + 1.4d0*log(supar(i))
ln_pinf_pe = soln%eq_partials(soln%throat_idx)%gamma_s + 1.4d0*log(supar(i))
end if

do j = 1, max_iter_area
Expand Down Expand Up @@ -987,7 +987,7 @@ subroutine RocketSolver_solve_supar_frozen(self, soln, idx, n_frz, pc, supar, h_
if (supar(i) < 2.0d0) then
ln_pinf_pe = ln_pinf_pt + sqrt(3.294d0*(log(supar(i))**2.0d0) + 1.535d0*log(supar(i)))
else if (supar(i) >= 2.0d0) then
ln_pinf_pe = soln%eq_partials(2)%gamma_s + 1.4d0*log(supar(i))
ln_pinf_pe = soln%eq_partials(soln%throat_idx)%gamma_s + 1.4d0*log(supar(i))
end if

do j = 1, max_iter_area
Expand Down
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