area mach relation find M(x)

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Hailey
Hailey 2019-9-2
评论： Torsten 2019-9-3
I'm trying to find M(x), mach number, with a range of 1 to 15 but in 0.2 intervals. I only know A_star, Pt, Tt, Pinf, gamma, and R. Not A(x)/A_star, the area ratio. So, I'm confused on how to find M(x) without the full area ratio.
For my code I have this so far. Gamma is known, and so is A_star. I need to find Area ratio so I can find A(x).
%M(x), ranging from 1 to 15
%simply eq.
g1 = g-1;
g2 = g+1;
%Find A(x) based on M(x)
M = 1:02:15;
Aratio = zeros(size(M));
for i = 1:M
Aratio(i) = (1/M(i))*(((2/g2)*(1+(g1/2)*M(i)^2))^((1/2)*(g2/g1)));
end
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Hailey
Hailey 2019-9-3
Yes, the equation is right, but the for loop is majorly wrong. I'm not getting the answer that's needed for the equation per Mach number.
I know how to do it in excel, but MATLAB I don't understand the language.
Torsten
Torsten 2019-9-3
for i = 1:numel(M)
Aratio(i) = (1/M(i))*(((2/g2)*(1+(g1/2)*M(i)^2))^((1/2)*(g2/g1)));
end
is the correct for-loop to calculate A(x)/A_star from M(x) according to your formula.

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