Pressure regulator

A pressure regulator is a valve that controls the pressure of a fluid to a desired value, using negative feedback from the controlled pressure. Regulators are used for gases and liquids, and can be an integral device with a pressure setting, a restrictor and a sensor all in the one body, or consist of a separate pressure sensor, controller and flow valve. Two types are found: The pressure reduction regulator and the back-pressure regulator. *A pressure reducing regulator is a control valve that reduces the input pressure of a fluid to a desired value at its output. It is a normally-open valve and is installed upstream of pressure sensitive equipment. *A back-pressure regulator, back-pressure valve, pressure sustaining valve or pressure sustaining regulator is a control valve that maintains the set pressure at its inlet side by opening to allow flow when the inlet pressure exceeds the set value. It differs from an over-pressure relief valve in that the o

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HIL Simulation of a mixed islanded power network with external DSP regulator

Philippe Allenbach, György Atilla Bànyai, André Hodder, Nicolas Junod, Basile Kawkabani, Sylvain Robert

The present paper describes the implementation of an industrial regulator in a real time Hardware-In-the-Loop simulation of a mixed islanded power network including precise models of the hydraulic system. The studied network is composed of three different types of electrical power generation systems and a consumer.

2010

HIL Simulation of a Mixed Islanded Power Network with External DSP Regulator

Philippe Allenbach, György Atilla Bànyai, André Hodder, Nicolas Junod, Basile Kawkabani, Sylvain Robert

The present paper deals with the development of a modular, flexible and structured block to block approach for the study of regulators by implementing the different blocks on a DSP (digital signal processor). The proposed low-cost approach has been applied and validated by the implementation of an industrial regulator in a real time hardware-in-the-loop simulation of a mixed islanded power network including precise models of the hydraulic system. The studied network is constituted of three different types of electrical power ...

2012

Characterisation of blade tip vortices by simultaneous time-resolved velocity and density field measurements

Karen Ann J Mulleners

The flow field around a helicopter is dominated by strong coherent vortices originating from the blade tip as a result of the pressure difference between suction and pressure side and a high radial velocity at the tip (Leishman, 2001; Green and Acosta, 1991). These vortices have a strong impact on the rotorcraft acoustics and performance due to its interactions with the rotor blades and the helicopter fuselage (Conlisk, 2001). Detailed knowledge of the vortex development, in particular of the formation process, and the scaling of characteristic parameters, e.g. vortex size and strength, are necessary for the design and the optimisation of vortex control measures. Due to the complexity and the inherent unsteady character of the vortex dynamics, this can only be achieved by time-resolved measurements of the velocity and density field simultaneously.

2012

ME-443: Hydroacoustique pour aménagements hydroélectriques

Introduction aux phénomènes propagatifs dans les circuits hydrauliques, calculs de coups de béliers, comportement transitoires d'aménagements hydroélectriques, simulation numériques du comportement dynamique de turbines Francis, Pelton et Kaplan, et étude de la stabilité de ces systèmes

ME-410: Mechanical product design and development

Study and explore design principles of the different mechatronic components and systems. We will cover in-depth especially on meso-scale actuators, sensors and body construction methods.

ME-323: Chemical process control

Apporter aux étudiants les connaissances de base nécessaires à la modélisation et à l'analyse des systèmes dynamiques. Leur apprendre à concevoir des régulateurs et à analyser la performance des systèmes commandés.

Valve

A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various pas

Diving regulator

A diving regulator is a pressure regulator that controls the pressure of breathing gas for diving. The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure

Oxy-fuel welding and cutting

Oxy-fuel welding (commonly called oxyacetylene welding, oxy welding, or gas welding in the United States) and oxy-fuel cutting are processes that use fuel gases (or liquid fuels such as gasolin