Cover of: Cavitation inception and internal flows with cavitation | Allan J. Acosta

Cavitation inception and internal flows with cavitation

  • 108 Pages
  • 3.26 MB
  • 1096 Downloads
  • English
by
David W. Taylor Naval Ship Research and Development Center , Bethesda, Md
Statementby Allan J. Acosta
SeriesDavid W. Taylor lecture -- 4th, 1979.
ContributionsDavid W. Taylor Naval Ship Research and Development Center
The Physical Object
Paginationxvi, 108 p. :
ID Numbers
Open LibraryOL24363340M
OCLC/WorldCa9167972

Cavitation inception and internal flows with cavitation Item Preview Cavitation inception and internal flows with cavitation by Acosta, Allan J., ; This book is available with additional data at Biodiversity Heritage Library. See also WorldCat (this item) Pages: Cavitation inception and internal flows with cavitation / By.

Acosta, Allan J., David W. Taylor Naval Ship Research and Development Center. Search Inside This Book: Results For: Click/Shift+Click pages to select for download. zoom out Zoom zoom in. Cancel Generate Review No Pages : Allan J.

Acosta. full text of "cavitation inception and internal flows with cavitation" see other formats ptnskdc, 7f -o// david w.

Description Cavitation inception and internal flows with cavitation FB2

taylor naval ship research and development center bethesda, maryland cavitation inception and internal flows with cavitation the fourth david w.

taylor lecture • i \ by allan j. acosta california institute of technology approved for public release: distribution unlimited. Cavitation is a phenomenon in which rapid changes of pressure in a liquid lead to the formation of small vapor-filled cavities in places where the pressure is relatively low.

When subjected to higher pressure, these cavities, called "bubbles" or "voids", collapse and can generate shock wave that is strong very close to the bubble, but rapidly weakens as it propagates away from the bubble.

(Fig. 1) is his comparison of nine photographs of cavitation inception on the standard body in six different facilities in which it may be seen that nwnbers 4, 5, 9 exhibit a similar form of attached cavity at inception (without transient precursers) and in the remaining cases inception appears in the form of traveling macroscopic Size: 6MB.

@article{osti_, title = {Cavitation in transiently operating centrifugal pumps}, author = {Lefebvre, P J and Barker, W P}, abstractNote = {The effect of transient operation on a centrifugal pump`s cavitation performance was investigated experimentally in the Naval Undersea Warfare Center`s Impeller Test Facility.

For low facility pressures where cavitation occurred, its. Cavitation in vortical structures is a common, albeit complex, problem in engineering applications. Cavitating vortical structures can be found on the blade surfaces, in the clearance passages, and at the hubs of various types of turbomachinery.

Cavitating microvortices at the trailing edge of attached sheet cavitation can be highly erosive. Cavitating hub vortices in the draft tubes of Cited by: KEY FEATURES OF BUBBLE CAVITATION Cavitation inception It is conventional to characterize how close the pressure in the liquid flow is to the vapor pressure (and therefore the potential for cavitation) by means of the cavitation number, File Size: KB.

Other Secondary Flows (Mbdf) References; Cavitation (Mbe) Introduction (Mbea) Cavitation Parameters (Mbeb) Cavitation Inception (Mbec) Scaling of Cavitation Inception (Mbed) Pump Performance (Mbee) Types of Impeller Cavitation (Mbef) Cavitation Inception Data (Mbeg) Cavitation Bubble Dynamics (Mbew) Cavitation Damage (Mbeh).

This set-up creates various 3D flow structures around the body, from cavitation inception to super cavities, at high Reynolds numbers (Re = *10^4 - *10^5) and. An Internet Book on Fluid Dynamics Cavitation Inception It is conventional to characterize how close the pressure in the liquid flow is to the vapor pressure (and therefore the potential for cavitation) by means of the cavitation number, σ, defined by File Size: 37KB.

Proceedings of the 7th International Symposium on Cavitation CAV August, Ann Arbor, Michigan, USA CAV Paper No. 73 LARGE EDDY SIMULATION OF CAVITATION INCEPTION IN A HIGH SPEED FLOW OVER AN OPEN CAVITY Ehsan Shams and Sourabh V.

Apte Computational Flow Physics Laboratory School of Mechanical Industrial and. Fundamentals of Cavitation by JEAN-PIERRE FRANC Research Director (CNRS), Turbomachinery and Cavitation Research Group, Laboratory of Geophysical and Industrial Fluid Flows (LEGI) of the Grenoble University (Institut National Polytechnique de Grenoble (INPG) & Université Joseph Fourier (UJF), France and JEAN-MARIE MICHEL.

This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth. Cavitation is generated not only in water, but also in any kind of fluid, such as liquid : $ Cavitation.

The formation of vapor- or gas-filled cavities in liquids. If understood in this broad sense, cavitation includes the familiar phenomenon of bubble formation when water is brought to a boil under constant pressure and the effervescence of champagne wines and carbonated soft drinks due to the diffusion of dissolved gases.

Liquid flows between the impeller and the housing at very high velocity, causing a vacuum at the housing wall and the formation of bubbles. As with suction cavitation, the implosion of those bubbles triggers intense shockwaves, causing premature wear of.

The sequence of inlet and outlet throttle, through which the high pressure diesel flows whilst the solenoid is actuated, are expected to enhance cavitation due to their microscopic size. In the long-term this may cause the accumulation of damaging internal deposits.

Key words: tip vortex, cavitation, inception, scaling law Introduction0F The propeller cavitation has received a sustained attention since it was firstly discovered in the middle of the 19th century. Typically, the propeller cavitation can cause serious damages, such as Cited by: This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth.

Therefore, even a beginner on cavitation can read and can understand what cavitation is.

Download Cavitation inception and internal flows with cavitation EPUB

Cavitation erosion may, therefore, play a role during hydrodemolition processes. Cavitation is the growth and implosion of gas-filled bubbles in a liquid. Basically, flow cavitation and acoustically induced cavitation can be distinguished, whereas the first type is more common in practice.

This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth.

Cavitation is generated not only in water, but also in any kind of fluid, such as liquid hydrogen. DEVELOPED CAVITATION- CAVITY DYNAMICS David R. Stinebring Michael L. Billet Cavitating flows are commonly described by the cavitation number, s, expressed as called cavitation inception. Of particular importance in the study of cavitation is the minimum pressure coefficient, C p minFile Size: KB.

cavitation [kav″ĭ-ta´shun] 1. cavity. the formation of cavities. cavitation (kav'i-tā'shŭn), 1. Formation of a cavity, as in the lung in tuberculosis or with development of a bacterial lung abscess. The production of small vapor-containing bubbles or cavities in a liquid or tissue by ultrasound.

Details Cavitation inception and internal flows with cavitation EPUB

cavitation (kăv′ĭ-tā′shən) n. Eighteenth Symposium on Naval Hydrodynamics. Washington, DC: The National Academies Press.

doi: / Cavitation Inception in Separated Flows. Rep. E, California Institute of Technology, Division of Engineering and Applied Science.

Idling, C. and Hammitt, F. A Photo- graphic Study of Spark Induced Cavitation Bub. This book provides a coherent and unified treatment of the fundamental physical processes involved in bubble dynamics and the phenomenon of cavitation. Of interest to a wide range of mechanical engineers, the study of cavitation and bubbly flows is applicable to topics ranging from valve damage in hydroelectric equipment, ship propellers, and internal combustion engines to.

@article{osti_, title = {Cavitation erosion in blocked flow with a ducted ice-class propeller}, author = {Doucet, J M and Bose, N and Walker, D and Jones, S J}, abstractNote = {Ships that operate in ice often encounter momentary increased propeller cavitation because ice pieces block the flow into the propeller.

For ducted propellers, this additional cavitation is more significant. Vaporous cavitation is the most common form of cavitation found in process plants. Generally it occurs due to insufficiency of the available NPSH or internal recirculation phenomenon.

It generally manifests itself in the form of reduced pump performance, excessive noise and vibrations and wear of pump parts. The phenomenon of cavitation was studied on four axisymmetric bodies whose boundary layers underwent a laminar separation and subsequent turbulent reattachment.

The non-cavitating flow was studied by holography and the Schlieren flow visualization technique. Surface distributions of the mean and the fluctuating pressures were also measured. In this channel of YouTube are edited videos for high school students as well as for students of physics, chemistry, biology, medicine, pharmacy, agriculture and all.

In the present paper the method of matched asymptotic expansions is applied to treat the flow problem for a hydrofoil of arbitrary aspect ratio with a jet flap in the case of small magnitudes of the jet momentum coefficient.

In the nearfield, i.e. in the vicinity of the trailing edge with a jet flap, the problem is reduced to a two-dimensional one. The relevant system of integro-differential. 3. Although tip clearance cavitation has been known for many years to cause a great deal of erosion in axial flow pumps, little is known how its inception point varies with variation of design parameters.

This is probably due to its dependence mainly on secondary flows which present design methodsFile Size: 4MB.Cavitation in Centrifugal Pumps and Prediction Thereof FkCViFrank C.

Visser Flowserve Pump Division Etten-Leur, The Netherlands Tutorial Presented at ASME Fluids Engineering Division Summer Conference, June ,,Houston, Texas, USAFile Size: 1MB.This book treats cavitation, which is a unique phenomenon in the field of hyd- dynamics, although it can occur in any hydraulic machinery such as pumps, propellers, artificial hearts, and so forth.

Cavitation is generated not only in water, but also in any kind of fluid, such as liquid hydrogen.