Mathematical Modeling of Hydraulic Transients in Simple Systems - Advances in Control and Automation of Water Systems - page 34

Comparison between (Figure 2.6) and (Figure 2.7) as two cases (Flow-Time tran-
sient curve) for Rasht city water-pipeline proved the surge tank effective role for Rasht
city water-pipeline. The first case was water-pipeline with water leakage which was
equipped with surge tank. The second case was water-pipeline without surge tank and
had water leakage. The flow was decreased from 3,014 (l/s) down to minimum value
2,520 (l/s) after 6 (s). So in 4 (s), it was grown up to 3228 (l/s). This was the effect of
water release from the leakage location. Hence in one second, 494 (l/s) water flows
have been interred and exited to surge tank (for Transmission Line with surge tank and
in leakage condition). It was showed that at 110M surge pressure in the near to pump
station (start of Transmission Line) leakage has been happened (Location of leakage).
Hence, water flow was decreased from 3,000 (l/s) to 2,500 (l/s). This was unaccounted
for water (UFW) hazard.
This chapter is based on the two miscible liquids in acceleration and deceleration
of the pumped fluid (Figure 2.8). So, interpenetration was investigated by comparison
between theoretical hydraulics analysis and bench scale laboratory pilot [14-16].

figure 2.7 Field Tests Model: Flow-Time & Volume-Time transient curve. (Rasht city
Water Pipeline Transmission Line without surge tank and in leakage condition).

research field tests model (water pipeline of rasht city in the north of iran)

Software Hammer - Version 07.00.049.00

Type of Run: Full

Date of Run: 09/19/08

Time of Run: 04:47 am

Data File: E:\k-hariri Asli\ daraye nashti.inp

Hydrograph File: Not Selected

Labels: Short