Table 4

Simulation results for the case of a stub diameter D3 = 15 mm with various stub lengths (L3) and an instantaneous valve closure of tc = 0.0 s

fWithout connection stub HWS-Bmax (m)With connection stub
ErrC-B(ws) (%)
L3 (m)HCmax (m)tCmax (s)Formula for tCmax
Col. (1)Col. (2)Col. (3)Col. (4)Col. (5)Col. (6)Col. (7)
Frictionless
f1 = f2 = f3 = 0 
212.03 0.02 414.02 0.01002 tc + L2/a2 + L3/a3 95.26 
0.05 414.02 0.01005 tc + L2/a2 + L3/a3 95.26 
0.10 414.02 0.01010 tc + L2/a2 + L3/a3 95.26 
0.20 414.02 0.01020 tc + L2/a2 + L3/a3 95.26 
0.30 414.02 0.01030 tc + L2/a2 + L3/a3 95.26 
0.40 414.02 0.01040 tc + L2/a2 + L3/a3 95.26 
0.50 414.02 0.01050 tc + L2/a2 + L3/a3 95.26 
0.60 414.02 0.01060 tc + L2/a2 + L3/a3 95.26 
0.70 414.02 0.01070 tc + L2/a2 + L3/a3 95.26 
0.80 414.02 0.01080 tc + L2/a2 + L3/a3 95.26 
0.90 414.02 0.01190 tc + L2/a2 + L3/a3 95.26 
1.00 414.02 0.01100 tc + L2/a2 + L3/a3 95.26 
With friction
f1 = 0.018
f2 = 0.018
f3 = 0.073 
196.03 0.02 381.75 0.01006 tc + L2/a2 + 3L3/a3 94.74 
0.05 381.75 0.01015 tc + L2/a2 + 3L3/a3 94.74 
0.10 381.75 0.01030 tc + L2/a2 + 3L3/a3 94.74 
0.20 381.67 0.01060 tc + L2/a2 + 3L3/a3 94.70 
0.30 381.60 0.01090 tc + L2/a2 + 3L3/a3 94.66 
0.40 381.50 0.01120 tc + L2/a2 + 3L3/a3 94.61 
0.50 381.42 0.01150 tc + L2/a2 + 3L3/a3 94.57 
0.60 381.34 0.01180 tc + L2/a2 + 3L3/a3 94.53 
0.70 381.26 0.01210 tc + L2/a2 + 3L3/a3 94.49 
0.80 381.18 0.01240 tc + L2/a2 + 3L3/a3 94.45 
0.90 381.10 0.01270 tc + L2/a2 + 3L3/a3 94.41 
1.00 381.02 0.01300 tc + L2/a2 + 3L3/a3 94.37 
fWithout connection stub HWS-Bmax (m)With connection stub
ErrC-B(ws) (%)
L3 (m)HCmax (m)tCmax (s)Formula for tCmax
Col. (1)Col. (2)Col. (3)Col. (4)Col. (5)Col. (6)Col. (7)
Frictionless
f1 = f2 = f3 = 0 
212.03 0.02 414.02 0.01002 tc + L2/a2 + L3/a3 95.26 
0.05 414.02 0.01005 tc + L2/a2 + L3/a3 95.26 
0.10 414.02 0.01010 tc + L2/a2 + L3/a3 95.26 
0.20 414.02 0.01020 tc + L2/a2 + L3/a3 95.26 
0.30 414.02 0.01030 tc + L2/a2 + L3/a3 95.26 
0.40 414.02 0.01040 tc + L2/a2 + L3/a3 95.26 
0.50 414.02 0.01050 tc + L2/a2 + L3/a3 95.26 
0.60 414.02 0.01060 tc + L2/a2 + L3/a3 95.26 
0.70 414.02 0.01070 tc + L2/a2 + L3/a3 95.26 
0.80 414.02 0.01080 tc + L2/a2 + L3/a3 95.26 
0.90 414.02 0.01190 tc + L2/a2 + L3/a3 95.26 
1.00 414.02 0.01100 tc + L2/a2 + L3/a3 95.26 
With friction
f1 = 0.018
f2 = 0.018
f3 = 0.073 
196.03 0.02 381.75 0.01006 tc + L2/a2 + 3L3/a3 94.74 
0.05 381.75 0.01015 tc + L2/a2 + 3L3/a3 94.74 
0.10 381.75 0.01030 tc + L2/a2 + 3L3/a3 94.74 
0.20 381.67 0.01060 tc + L2/a2 + 3L3/a3 94.70 
0.30 381.60 0.01090 tc + L2/a2 + 3L3/a3 94.66 
0.40 381.50 0.01120 tc + L2/a2 + 3L3/a3 94.61 
0.50 381.42 0.01150 tc + L2/a2 + 3L3/a3 94.57 
0.60 381.34 0.01180 tc + L2/a2 + 3L3/a3 94.53 
0.70 381.26 0.01210 tc + L2/a2 + 3L3/a3 94.49 
0.80 381.18 0.01240 tc + L2/a2 + 3L3/a3 94.45 
0.90 381.10 0.01270 tc + L2/a2 + 3L3/a3 94.41 
1.00 381.02 0.01300 tc + L2/a2 + 3L3/a3 94.37 
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