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The details of system settings and parameters for testing are shown in Tables 1 and 2, respectively. The transients in the system are generated by the fast and complete closure of the inline valve from initial full open state. The transient data are collected at the two ends of the pipelines (S1 and S2), with S2 used for the calibration of wavespeed of the test pipeline, and S1 (close to the inline valve) for the pipe fault detection and analysis later in this study.

Table 1

Setting of geometric information

NumberFault and instrumentValueDistance to valve (m)
Pressure sensor1 (S1) – 1.05 
Blockage1 (B1) 5 m 7.05 
Leakage1 (L1) 3 mm (0.35 L/s) 16.13 
Junction (J1) 2 m 30.22 
Leakage2 (L2) 4 mm (0.47 L/s) 44.31 
Pressure sensor2 (S2) – 59.39 
NumberFault and instrumentValueDistance to valve (m)
Pressure sensor1 (S1) – 1.05 
Blockage1 (B1) 5 m 7.05 
Leakage1 (L1) 3 mm (0.35 L/s) 16.13 
Junction (J1) 2 m 30.22 
Leakage2 (L2) 4 mm (0.47 L/s) 44.31 
Pressure sensor2 (S2) – 59.39 
Table 2

Experimental test condition

Basic propertiesValue
Pipe material Galvanized steel material 
Pipe diameter(mm) DN40 
Calibrated wave speed (m/s) 1014.10 
Sampling frequency (Hz) 5,000 
Closure valve time (s) 0.2 
Initial Reynolds number (Re) 2.1 × 103–5.1 × 104 
Friction coefficient (f0.0135 
Tank pressure (mH2O) 28 
Basic propertiesValue
Pipe material Galvanized steel material 
Pipe diameter(mm) DN40 
Calibrated wave speed (m/s) 1014.10 
Sampling frequency (Hz) 5,000 
Closure valve time (s) 0.2 
Initial Reynolds number (Re) 2.1 × 103–5.1 × 104 
Friction coefficient (f0.0135 
Tank pressure (mH2O) 28 

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