Abstract
Formulations of the transient behaviour in series pipe systems are derived using impulse response analysis. The impact of leakage is incorporated into the transfer functions of the complex head and discharge. The impedance transfer functions along a series pipeline are derived to simulate impact of pressure and discharge about a maneuver of valve located at the end of pipe system. An algorithm is proposed to predict leak quantity and location for a series pipeline systems. Genetic Algorithm (GA) is integrated into the impulse response method. The objective functions for the leakage detection can be made using the pressure-head response at the valve, or the pressure-head or the flow response at a certain point of the pipeline located upstream from the valve. Frequency dependent-friction is used to consider the impact of unsteady friction in the transient flow. Simulation and calibration results show that the proposed method of leak detection has significant potential for improved leak management for series pipe systems.
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