Hi everyone !
I tried plotting the Flow characteristics for an Equal percentage
valve using MATLAB.
The theory for the valve and its characteristics can be read here,
https://controls.engin.umich.edu/wiki/index.php/ValveModeling#Flow_Characteristics.
% Flow Characteristics for an Equal percentage Valve in MATLAB
% Shubham Singh Tomar
R = 50;
Cv2 = 115; ; % units of gpm/(psi^0.5)
q2 = 15:1:220; % feasible flow rates, gpm
delPv2 = 40 - 30*(q2/200).^2 ; % psi
lift2 = 1 + log(q2./(Cv2*sqrt(delPv2))) / log(R);
figure, plot(lift2,q2,'r--','LineWidth',2)
xlabel('lift'), ylabel('q , gal/min'), grid
title(['Equal Percentage Valve R = ' int2str(R)'])
Regards
Shubham
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