beta_in 90[deg] "Blade angle in"
beta_out 10[deg] "Blade angle out"
alfa_in 90[deg]-beta_in "Angle of the inside blade plate"
alfa_out 90[deg]-beta_out "Angle of outside blade plate"
beta alfa_out-alfa_in "Difference between angles"
final_angle beta+alfa_in "Maximum angle of the blade plane"
theta alfa_out-beta/2 "Segment angle"
bl_h 2[cm] "Blade height"
c_rad 5[cm] "Radial chord"
chord c_rad/cos(theta) "Chord"
d_in 4[cm] "Inner diameter"
d_out sqrt((R_constr-th_blade/2)^2+(R_constr-d_in/2-2*th_blade/2)^2-2*(R_constr-th_blade/2)*(R_constr-d_in/2-2*th_blade/2)*cos(beta+alfa_in))*2 "Impeller diameter"
exp_out 1.0 "Expansion rate of the outlet channel"
exp_spi .045 "Spiral exponential"
gap 5[mm] "Distance control parameter between plate and spiral and rotating domain construction"
in_d 3.5[cm] "Inlet channel diameter"
n_b 7 "Number of blades"
pl_th 0.4[cm] "Plate thickness"
R_constr chord/(2*sin(beta/2)) "Construction radius"
sh_d 2[cm] "Shaft diameter"
sh_h 0.3[cm] "Distance between volute and plate from the bottom"
th_blade 2[mm] "Blade thickness"
u_c 1.5[mm] "Upper clearance"
vol_h sh_h+pl_th+bl_h+u_c "Volute height"