rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Experimental Measurement of a Model Pipeline Dredge Entrance Loss Coefficient and Modification of a Spreadsheet for Estimating Model Dredge Performance
  name:
    name part: Girani, Joseph Albert
    role:
      role term: creator
    role:
      role term: author.
  name:
    name part: Randall, Robert E.
    name part: 1940-
    role:
      role term: thesis advisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2015
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Cutter suction dredges are used in a multitude of scenarios, as they are mobile and efficient. One such situation includes dredge sites where debris could be present. In a location with the possibility of debris impeding the cutter suction dredge centrifugal pump, often a screen is placed over the suction line entrance. Although this prevents the inflow of large debris, it increases the entrance loss of the system. The objective of the study is to determine the minor loss coefficient of the Center for Dredging Studies' model cutter suction dredge. Testing was completed over the spectrum of specific gravities (SG) and flow rates achievable in the laboratory. The results show that the minor loss coefficient of the screen is a function of specific gravity and velocity, and varies between approximately 1.4 and 2.4 for the model laboratory dredge. Above the critical velocity the loss coefficient increases nearly linearly with specific gravity, if velocity is held constant. Similarly, if specific gravity is held constant the losses increase linearly with velocity. Additionally, as specific gravity is increased, the screen losses become a weaker function of velocity. Higher losses were observed at large specific gravities, as the flow rate decreased below the critical flow rate of the system. The production losses associated with the screen for the model cutter suction dredge were calculated using the pump characteristic curves. They showed variations between 2.4% and 3.4%, presenting larger production losses at higher pump speeds. An additional aspect of the study concerned comparing the experimental data with that of a widely accepted theoretical method. A previously existing spreadsheet from the Center for Dredging Studies (CDS) was modified to accommodate the minor loss values of the screen, along with the characteristics of the model laboratory dredge and intake losses. The spreadsheet outputs the predicted head loss of the system according to the flow rate and specif…
  note: by Joseph Albert Girani.
  note: "Major Subject: Ocean Engineering."
  note: Includes vita.
  note: Master of Science Texas A & M University 2014 http://hdl.handle.net/1969.1/152703
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major Ocean Engineering
  subject:
    topic: dredging
  subject:
    topic: entrance loss
  subject:
    topic: cutter suction dredge
  subject:
    topic: model dredge
  subject:
    topic: screen
  subject:
    topic: loss coefficient
  identifier: http://hdl.handle.net/1969.1/152703
  record info:
    record content source: TXA
    record creation date: 150205
    record change date: 20151206125721.0
    record identifier: in00003489063
    language of cataloging:
      language term: eng