Code covered by the BSD License  

Highlights from
Spark Ignition Engine GUI

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from Spark Ignition Engine GUI by Rakesh Mandal
computer program for thermodynamic engine model for a spark ignition engine.

sz_massf(P0,T0,Pv,k,R,A,ws) 
% Mass flow equation
function mf = sz_massf(P0,T0,Pv,k,R,A,ws)
if Pv > P0
    mf = 0;
    return
end
Ff = A * (P0/(R * T0)) * sqrt(1000 * k * R * T0)/ws;
pc = (2/(k+1))^(k/(k-1));
if (Pv/P0) > pc
    mf = Ff * ((2/(k-1)) * abs((Pv/P0)^(2/k) - (Pv/P0)^((k+1)/k)))^0.5;
else
    mf = Ff * (2/(k+1))^((k+1)/(2*(k-1)));
end
end

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