How to extrapolate airfoil trailing edge to make it closed?

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piston_pim_offset
piston_pim_offset 2024-5-23
评论： Ayush Anand 2024-5-24
Hi everyone.
I am working on airfoils right now. When l plot the data, airfoil trailing edge comes open. l tried the accepted answer on this link ( https://www.mathworks.com/matlabcentral/answers/279331-extrapolation-and-estimation-of-data ), but it didn't work for me (gives unrelated negative values). Can anyone help me to solve this problem?
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piston_pim_offset
piston_pim_offset 2024-5-23
The code was like this:
data = xlsread('data.xlsx'); % Airfoil data
extr = linspace(1,0.9,100);
data_extr = interp1( data(:,1) , data(:,2) , extr ); % Extrapolation of trailing edge
plot(data(:,1) , data(:,2) , 'r') % Plot of airfoil from original data
hold on
plot(extr , data_extr , 'k') % Plot of trailing edge
Ayush Anand
Ayush Anand 2024-5-24
I can't reproduce the results without the actual data you are importing from "data.xlsx". If its not private data, would you mind sharing that as well?

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