Testing of a shrouded, short mixing stack gas eductor model using high temperature primary flow.
Eick, Ira James.
Pucci, Paul F.
MetadataShow full item record
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.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
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 ...
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 ...
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. ...