Need help on program

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Chinmayraj Doddarajappa
评论： Chinmayraj Doddarajappa 2022-7-13
Hello,
I am trying to model the below conditions. Input h is given as 0:50:25000
rho value should not cross 1.23 (when h=0) and it must decrease as h increases. But I am getting rho value of 7+ which is incorrect (Refer graph).
Can someone help me on this?
,
Below is the script I have written for the above condition
for i = 1:length(h)
if h(i)<11000
Te = 15.04-0.00649.*h;
pe = 101.29.*((Te+273.1)./288.08).^5.256;
elseif h(i)>=11000 & h(i)<=25000
Te = -56.46;
pe = 22.65.*10.^(1.73-0.000157.*h);
else
Te = -131.21+(0.00299.*h);
pe = 2.488*((Te+273.1)/216.6).^(-11.388);
end
end
rhoe = pe./(0.2869.*(Te+273.1));
plot(h,rhoe,'Color',[0 0 1],'LineWidth',1.5);

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采纳的回答

Torsten
Torsten 2022-7-13
编辑：Torsten 2022-7-13
Ran in:
h = 0:50:50000;
for i = 1:length(h)
if h(i)<11000
Te(i) = 15.04-0.00649.*h(i);
pe(i) = 101.29.*((Te(i)+273.1)./288.08).^5.256;
elseif h(i)>=11000 && h(i)<=25000
Te(i) = -56.46;
pe(i) = 22.65.*exp(1.73-0.000157.*h(i));
else
Te(i) = -131.21+(0.00299.*h(i));
pe(i) = 2.488*((Te(i)+273.1)/216.6).^(-11.388);
end
end
rhoe = pe./(0.2869.*(Te+273.1));
plot(h,rhoe,'Color',[0 0 1],'LineWidth',1.5);

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