Water Hammer Action Analysis for Pumps in parallel Operation

Multiple Scales Analysis of Water Hammer Attenuation

A multiple scales analysis is used to construct a uniformly accurate approximation to water hammer pressure wave attenuation that is initiated by a sudden valve opening. The method of analysis is well suited to the study of a water hammer that possesses several time scales and is applied to a mild generalization of the classical equations. It should prove useful for finding attenuation curves w...

Action Selection for Hammer Shots in Curling

Curling is an adversarial two-player game with a continuous state and action space, and stochastic transitions. This paper focuses on one aspect of the full game, namely, finding the optimal “hammer shot”, which is the last action taken before a score is tallied. We survey existing methods for finding an optimal action in a continuous, lowdimensional space with stochastic outcomes, and adapt a ...

Optimized Charge Pumps for Subthreshold Operation

Over the last decade, the use of Field Programmable Gate Arrays (FPGAs) has grown from the design verification of digital systems to a wide variety of commercial and space applications for which low power consumption and re-programmability are paramount. To address the issue of low power, researchers have reported FPGAs incorporating a variety of design techniques to improve energy efficiency. ...

Water Hammer with Column Separation:

Column separation refers to the breaking of liquid columns in fully filled pipelines. This may occur in a water hammer event when the pressure drops to the vapor pressure at specific locations such as closed ends, high points or knees (changes in pipe slope). A vapor cavity, driven by the inertia of the parting liquid columns, will start to grow. The cavity acts as a vacuum, a low-pressure poin...

Water hammer dissipation in pneumatic slug tests