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+// scilab Code Exa 7.2 Calculating the discharge of a geometrically similar blower and specific speed of the fan
+pr=2; // Compressor pressure ratio
+N1=1.47e3; // fan Speed in RPM
+N2=0.36e3; // blower Speed in RPM
+Q1=2; // discharge in m3/s
+h=10e-3; // in m W.G.
+ro_w=10e2;
+ro_a=1.25; // density of air in kg/m3
+omega1=%pi*2*N1/60;
+g=9.81; // in m/s2
+p=ro_w*g*h
+H=p/(ro_a*g);
+delh_s=g*H;
+NS=omega1*sqrt(Q1)*delh_s^(-3/4)
+disp(NS,"the specific speed is")
+// for the same specific speed of two geometrically similar fans
+a=N1/N2;
+Q2=a^2*Q1;
+disp("m3/s",Q2," and the discharge of a geometrically similar blower is")