1 edition of Analysis of the Waterhammer Concept as a Mine Countermeasure System found in the catalog.
Analysis of the Waterhammer Concept as a Mine Countermeasure System
by Storming Media
Written in English
|The Physical Object|
With the launch of our defense information website (), we introduced a micro-site on defense decisions. We wrote: “In this new section of the website, we will address U.S. and allied upcoming procurement choices and decisions. “We are focused on how platform and system choices affect the evolution of the capabilities, concepts of [ ]. Most important, however, the use of operations and systems analysis in support of decision making can effectively limit the influence of politically driven opinion. Yet the Navy has now effectively replaced operations and systems analysis as the basis for making investment decisions with an integrated product team-based consensus-building process.
The countermeasure of driver fatigue is valuable for reducing the risk of accidents caused by vigilance failure during prolonged driving. Listening to the radio (RADIO) has been proven to be a relatively effective “in-car” countermeasure. However, the connectivity analysis, which can be used to investigate its alerting effect, is subject to the issue of signal mixing. Water hammer Solutions - Background. When water flow is started or stopped faster than the system can respond acoustically, a pressure surge commonly referred to as a water hammer event will occur. This same principle is also applicable when the flowing medium is .
The question of whether waterhammer analysis on new pipe systems is optional or required does not have a definite answer. In some cases it is clear - such as when the pipe system is being designed in compliance with ASME code (see How AFT Impulse Can Help Engineers Comply With ASME Codes).But in many cases it is up to experience and judgment whether or not to perform waterhammer analysis. Water hammer (also called fluid hammer) is a pressure surge caused when a fluid in motion is suddenly forced to stop. Waterhammer is a serious safety issue for any high-production hydraulic facility. Your hydraulic piping system will continue to abnormally pulsate until it causes severe damage. Educate yourself on the facts and how you can identify and prevent waterhammer.
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REPORTDOCUMENTATIONPAGE FormApproved OMBNo Publicreportingburdenforthiscollectionofinformationisestimatedtoaverage1hourperresponse,including. Download Citation | Analysis of the Waterhammer Concept as a Mine Countermeasure System | The purpose of this thesis is to provide an analysis of the Waterhammer concept design.
Waterhammer is a. The purpose of this thesis is to provide an analysis of the Waterhammer concept design. Waterhammer is a device intended to generate repetitive shock waves to clear a path through the very shallow water region for amphibious operations.
These repetitive shock waves are intended to destroy obstructions and mines : Design of an Underwater Mine Countermeasure System 1 Context Analysis Stakeholder Analysis Problem/Need Statements Concept of Operations Simulation Project Plan 2 •70% of Earth is covered in water •80% of the human population lives within 60 miles of coastal areas Naval Operations Analysis, 3rd ed., Naval Institute.
Hydraulic shock (colloquial: water hammer; fluid hammer) is a pressure surge or wave caused when a fluid, usually a liquid but sometimes also a gas, in motion is forced to stop or change direction suddenly; a momentum change. This phenomenon commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe.
It was compiled to be used in conjunction with the book, for the Management Technical Training Course in Waterhammer Analysis. The solutions presented primarily demonstrate the methods presented in each chapter of Mr.
Parmakian's book, and the answers are of slide rule accuracy. Those problems solved by other methods may be somewhat different. Waterhammer (also called fluid hammer) is a pressure surge caused when a fluid in motion is suddenly forced to most common occurrence is when a valve closes at an end of a pipeline system.
The sudden closure creates a pressure spike / wave times the normal flowing pressure which leads to a vacuum condition within the pipe. Book. Jan ; Ajaya K. Gupta; View Analysis of the Waterhammer Concept as a Mine Countermeasure System.
The purpose of this thesis is to provide an analysis of the Waterhammer concept. Bergant, Simpson & Sijamhodzic. Water Hammer Analysis of Pumping Systems in 13 Underground Mines where Q;_1 is the known discharge at the immediately adjacf'nt upstream section at time t-~t, Hi_ 1 is the known hydraulic grade line elevation at the in1mediately adjacent upstream section at timet-~t (Figure 1).Hp and Qp are the unknown hydraulic grade line elevation.
referring to water systems, water hammer. The latter term suitably reflects the harmful effects that the hammer-like blows accom-panying the pressure surges can have on pipes and system com-ponents. Water hammer causes piping, valves, pipe fixtures, sup-ports, system components, etc.
to suffer the added strain of dynamic loads. The term. The most amazing thing about the book is that it was done in the mid's and is still up-to-date, because from that time on the waterhammer analysis has evolved not so much in the prevention and estimation aspects but in the computational one.
Subject that is not mentioned in this s: 3. There's a marked tendency among military observer/commenters to expect any device or system to work % against every imaginable threat.
This is an absurd expectation. Mine countermeasures are one of the best examples of needing multiple systems to deal with the threat and the multiple types of the threat.
efficient mine countermeasure becomes increasingly necessary. Current mine clearing techniques Mine clearance systems that are most commonly in use by the U.S.
Navy today are time consuming and expensive. An MHS helicopter flies to the site of the mine field and deploys a. BMT has launched a new mine countermeasure (MCM) concept design capable of clearing mines faster over a greater area and with less risk to the crew, whilst simultaneously providing broader utility to navies around the world.
VENARI® provides a flexible platform that is capable of a wide range of roles and has been specifically designed [ ] The post BMT introduces new mine countermeasure.
“The Mk generates an acoustic source by cavitation and the specialized cable creates an electromagnetic field. The output of these two emitters generates the appropriate fields that satisfy the mine logic so that the mine detonates,” explained Colleen E.
O’Rourke, an official at Naval Sea Systems Command (NAVSEA). (5). HAMMER is a free program I used a few years ago to simulate water hammer in a water pipe. From HAMMER read me file: HAMMER is a program which simulates the effects of water hammer in a reservoir and pipeline system in which a valve at the downstream end is opened or closed by the user.
The program is a product of the Urban Water Systems Group. Mine Countermeasures (MCM) is arguably one of the most dirty and dangerous of all naval missions to successfully prosecute.
Of the 19 U.S. Navy ships seriously damaged or sunk since World War II, 15 are the direct result of hitting mines. Cost-effective solutions to avoid water hammer related problems and minimize risk; Verifification of system hydraulics including pump operating points, detailed flow and pressure predictions, and control valve operation; 5 Wood advantages.
Wood is a global leader in water hammer and pulsation analysis because of these factors. develop a shallow-water mine countermeasure capability in order to support the forcible entry requirement of expeditionary maneuver warfare.
History The Marine Corps first became involved with the shallow-water mine countermeasure (MCM) fight with its WWII raider battalions -- the predecessors of today's reconnaissance units. CALCULATION TOOLS Water hammer calculator Water hammer calculator The data and information contained in this guide do not constitute a stated or implied guarantee Inlet pressure (bar): Water velocity (m/s): Pipe length (m): Valve closing (s): Maximum pressure (bar).
The mine‐hunting environment plays an important role in the performance of side‐scan sonar, as it does for any mine countermeasures (MCM) sensor. The chapter examines search patterns, including lawn‐mowing, zigzagging, and random searches.Apps, Michael.
“New Concept in Minehunters Adopted the RAN.” Pacific Defence Reporter Broughton, Buzz. “Mine Countermeasures: Zapping the ‘Speed Bumps.’” Surface Warfare, July-August Carter, Rondi and Tom Mignone. “Advanced Video System for Mine Countermeasures ROV.” Sea Technology, Mayv.
33, no. 5, p. An Operational Effectiveness Analysis of Legacy and Future Mine Countermeasures Systems using Discrete Event Simulation.
The Journal of Defense Modeling and Simulation. Beery, P. T., & Paulo, E. P, (). System Architecting and Analysis of Medium Displacement Unmanned Surface Vehicle “Sea Hunter. Naval Engineers Journal, 4(),