1 edition of Cavitation Effects on a Ship-Like Box Structure Subjected to an Underwater Explosion found in the catalog.
Cavitation Effects on a Ship-Like Box Structure Subjected to an Underwater Explosion
by Storming Media
Written in English
|The Physical Object|
The damaging effects of cavitation may significantly shorten the life of a centrifugal pump impeller as illustrated by this problem investigation. The application involves horizontal split-case pumps that are used to provide cooling water to chiller units. The existing pumps were reported to be experiencing rapid wear as a result of the effects of. Pump cavitation is the formation and subsequent collapse or implosion of vapor bubbles in a pump. It occurs when gas bubbles are formed in the pump due to .
Cavitation – an Introduction. Cavitation is the formation of vapour cavities in a liquid, small liquid-free zones ((“ bubbles” or “voids”), that are the consequence of forces acting upon the liquid. It usually occurs when a liquid is subjected to rapid changes of pressure that cause the formation of cavities in the liquid where the pressure is relatively low. In this post we are addressing the phenomenon of cavitation and its effects on the naval field. First of all, let’s describe it. Cavitation consists on the vaporisation, bubble generation and implosion which occur in a liquid because of the sudden variation in local pressure. The most exposed parts.
This causes cavitation within the crack that can, in effect, break off large chunks of rock. Propeller Destruction. Cavitation damage on propellers is a large concern in the design of high speed propellers. A general rule is that the faster the propeller spins, the higher your speed. However, a higher speed means a greater chance of cavitation. Cavitation wear is also known as cavitation erosion, vaporous cavitation, cavitation pitting, cavitation fatigue, liquid impact erosion and wire-drawing. Cavitation wear is a fluid-to-surface type of wear that occurs when a portion of the fluid is first exposed to tensile stresses that cause the fluid to boil, then exposed to compressive.
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Thisthesisinvestigatestheeffectofbulkandlocalcavitationonathree-dimensionalship-likebox model. The fluid surroundingthe structure is modeled to capturethe effect of cavitation.
Cavitation Effects on a Ship-Like Box Structure Subjected to an Underwater Explosion (). Fluid-Interaction and Cavitation Effects on a Surface Ship Model Due to an Underwater Explosion [Leonard D. Santiago] on *FREE* shipping on qualifying offers. This is a NAVAL POSTGRADUATE SCHOOL MONTEREY CA report procured by the Pentagon Author: Leonard D.
Santiago. Cavitation Effects on A Ship-Like Box Structure Subjected to An Underwater Explosion, MSc. Thesis, Naval Postgraduate School, California. Thesis, Cited by: 1. Cavitation effects on a ship-like box structure subjected to an underwater explosion By Steven L.
Wood Download PDF (6 MB)Author: Steven L. Wood. Wood Steven L. Cavitation effects on a ship-like box structure subjected to an underwater explosion. Master’s Thesis.
Monterey, California: Naval Postgraduate School; September Cited by: Course Notes for Underwater Shock Analysis, Naval Postgraduate School, Monterey, California Cavitation effects on a ship-like box structure subjected to an underwater explosion Underwater shock.
Abstract. As well as shock wave and bubble pulse loading, cavitation also has very significant influences on the dynamic response of surface ships and other near-surface marine structures to underwater explosive loadings.
In this paper, the acoustic-structure coupling method embedded in ABAQUS is adopted to do numerical analysis of underwater explosion considering by: 2.
Cavitation can occur in water area near the free surface and structure subjected to underwater shock. A high reloading pressure is generated when the cavitation region collapses.
Full text of "The effect of stiffener smearing in a ship-like box structure subjected to an underwater explosion" See other formats DUDLEY KNOX LIBRARY NAVAL POSTGRADUATE SCHOOL MONTEREY, CA aLtfT & NAVAL POSTGRADUATE SCHOOL MONTEREY, CALIFORNIA THESIS THE EFFECT OF STIFFENER SMEARING IN A SHIP-LIKE BOX STRUCTURE SUBJECTED TO AN UNDERWATER EXPLOSION.
This thesis investigates the characteristics of a close proximity underwater explosion and its effect on a ship-like structure. Finite element model tests are conducted to verify and validate the propagation of a pressure wave generated by an underwater explosion through a fluid medium, and the transmission of the pressure wave in the fluid to a structure using the MultiMaterial Arbitrary.
If cavitation is neglected, (1b) reduces to ψ ¨ sc = c 2 s sc and the system (1) reduces to the acoustic wave equation. The scattered field is driven by a pressure boundary condition at the free surface and by the motion of the by: Wood, S.L., "Cavitation Effects on a Ship-Like Box Structure Subjected to an Underwater Explosion", Master's Thesis, Naval Postgraduate School, Monterey, CA, Santiago, L.D., "Fluid-Interaction and Cavitation Effects on a Surface Ship Model Due to an Underwater Explosion", Master's Thesis, Naval Postgraduate School, Monterey, C A, This book is intended as a combination of a reference book for those who work with cavitation or bubble dynamics and as a monograph for advanced students interested in some of the basic problems associated with this category of multi-phase ﬂows.
A book like this has many roots. It. This thesis investigates the use of the numerical modeling tools LS-DYNA and USA in modeling general far-field underwater explosions (UNDEX) by modeling a three-dimensional box barge that is subjected to a far-field underwater explosion.
Past UNDEX models using these tools have not been validated by experiment and most are limited to very specific problems because of the simplifying. INTRODUCTION. In the preceding chapter some of the equations of bubble dynamics were developed and applied to problems of bubble growth. In this chapter we continue the discussion of bubble dynamics but switch attention to the dynamics of collapse and, in particular, consider the consequences of the violent collapse of vapor-filled cavitation bubbles.
Under the combined effects of the free surface and structure, the UNDEX shock and cavitation loading characteristics are analyzed, and the influences of complicated cavitation effects on dynamic responses of the sphere are discussed. The interaction between an underwater explosion bubble and an elastic-plastic structure is a complex transient process, accompanying violent bubble collapsing, jet Cited by: CAVITATION EFFECTS ON A SHIP-LIKE BOX STRUCTURE SUBJECTED TO AN UNDERWATER EXPLOSION Steven L.
Wood Lieutenant, United States Navy B.S., United States Naval Academy, Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN MECHANICAL ENGINEERING from the NAVAL POSTGRADUATE SCHOOL September Cavitation in a Water Pump and Valve - Excellent Visual and Audible Demostration - Duration: Mountain States Engineering and Controlsviews.
Effects of Cavitation: the following are the effects of cavitation. i. The metallic surfaces are damaged and cavities are formed on the surfaces. ii. Due to sudden collapse of vapour bubbles, considerable noise and vibrations are produced.
iii. The efficiency of a turbine decreases due to cavitation. Due to pitting action, the.Cavitation in gas-saturated liquids Oscillating gas bubbles can be created in a liquid by exposing it to ultrasound.
These gas bubbles can implode if the sound pressure is high enough. This process is called cavitation. Interesting phenomena take place during the collapse. The gas and vapour inside the bubbleCited by: 2.
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