Accession Number:

ADA134794

Title:

Characteristics of a Four Nozzle, Slotted Mixing Stack with Slanted Shroud, Gas Eductor System

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1983-09-01

Pagination or Media Count:

124.0

Abstract:

Cold flow tests were conducted on a four nozzle gas educator system to evaluate the systems performance using a slotted mixing stack with slanted shroud and diffuser rings. The stack length-to-diameter ratios evaluated were 1. 5 and 2.25. The nozzles were constructed with a ratio of total area or primary flow to area of mixing stack of 2.5. One set of straight nozzles and another set, tilted at 15 degrees, were used. Secondary and tertiary pumping coefficients, and mixing stack pressure distributions were used to evaluate the slant shrouded mixing stacks. Pumping performance of the four straight nozzle shrouded system was found to be comparable to previously tested unshrouded models, showing no specific advantages. Pumping performance of the tilted nozzles and slanted shroud showed an improvement over the straight shroud model, with a noticeable increase in the tertiary pumping.

Subject Categories:

  • Marine Engineering
  • Pumps, Filters, Pipes, Tubing, Fittings and Valves
  • Fluid Mechanics
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE