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Testing of a shrouded, short mixing stack gas eductor model using high temperature primary flow.

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Author
Eick, Ira James.
Date
1982-10
Advisor
Pucci, Paul F.
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Abstract
An existing apparatus for testing models of gas eductor systems using high temperature primary flow was redesigned and modified to provide improved control and performance over a wide range of gas temperatures and flow rates. Pumping coefficient, temperature, and pressure data were recorded for two gas eductor system models. The first, previously tested under hot flow conditions, consisted of a primary plate with four straight nozzles and a slotted, shrouded mixing stack with two ring diffuser (L/D=2.5). The second was geometrically similar to a model previously tested in cold flow. This model employed a primary plate with four tilted-angled nozzles and a slotted, shrouded mixing stack with two ring diffuser (L/D=1.5). Thermal imagery was used to generalize the data obtained by direct temperature measurement. The validity of cold flow model testing is confirmed. The short stack with tilted-angled primary nozzles is shown to have superior mixing and pumping performance, but to exhibit significantly higher shroud and diffuser surface temperatures.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/20375
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  • 1. Thesis and Dissertation Collection, all items

Related items

Showing items related by title, author, creator and subject.

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    Effect of shroud geometry on the effectiveness of a short mixing stack gas eductor model. 

    Kavalis, Anastasios Emmanouil (Monterey, California. Naval Postgraduate School, 1983-06);
    An existing apparatus for testing models of gas eductor systems using high temperature primary flow was modified to provide improved control and performance over a wide range of gas temperature and flow rates. Secondary ...
  • Thumbnail

    Performance of multiple, angled nozzles with short mixing stack eductor systems 

    Davis, Charles Carver (1981-09);
    Cold flow tests were conducted on a four-nozzle gas educator system to evaluate the feasibility of reducing mixing stack lengths by the application of angled primary flow nozzles. Three short mixture stacks with length ...
  • Thumbnail

    Characteristics of a four-nozzle, slotted short mixing stack with shroud, gas eductor system 

    Drucker, Carl John (Monterey, California. Naval Postgraduate School, 1982-03);
    Cold flow tests were conducted on a four nozzle (nozzles tilted at a 15 degree angle) gas educator system to evaluate the system's performance utilizing a short slotted missing stack and two shrouds with diffuser rings. ...
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