Effect of shroud geometry on the effectiveness of a short mixing stack gas eductor model.
Kavalis, Anastasios Emmanouil
Pucci, Paul F.
Cullreth, William G.
MetadataShow full item record
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 flow pumping, temperature and pressure data were recorded for two gas eductor system models. The first, previously tested under hot flow conditions, consists of a primary plate with four tilted-angled nozzles and a slotted, shrouded mixing stack with two diffuser rings (overall L/D = 1.5). The second consisted of the same nozzles and mixing stack, with a modified shroud and three diffuser rings (overall L/D = 1.5). A portable pyrometer with a surface probe was used for the second model in order to identify any hot spots at the external surface of the mixing stack, shroud and diffuser rings. The second model is shown to have almost the same mixing and pumping performance with the first one but to exhibit much lower shroud and diffuser surface temperatures.
RightsCopyright is reserved by the copyright owner
Showing items related by title, author, creator and subject.
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. ...
Eick, Ira James. (Monterey, California. Naval Postgraduate School, 1982-10);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 ...
Hill, James Allan (Monterey, California. Naval Postgraduate School, 1979-09);Hot flow model tests of multiple nozzle gas turbine exhaust eductor systems were conducted to evaluate the temperature effects of several eductor design modifications. A one-dimensional analysis of a simple eductor ...