EFFECTS OF SEVERAL GEOMETRIC PARAMETERS ON THE PERFORMANCE OF A MULTIPLE NOZZLE EDUCTOR SYSTEM

Cold flow tests of a four nozzle eductor system were conducted to evaluate the effects of certain geometric parameters on eductor performance. Eductor performance was related to non-dimensional parameters governing the flow phenomenon developed from a one-dimensional analysis of a simple eductor system based on conservation of momentum for an incompressible gas. An experimental correlation of these parameters was developed and used to determine the effects of several geometric parameters on eductor performance. The geometries tested consisted of: two mixing stack lengths, 2 and 3 mixing stack diameters long; varying the distance between the primary nozzle exist plane and the entrance to the mixing stack; and addition of a conical transition to the entrance of the constant cross section part of the mixing stack. Within the range of variables tested, the longer mixing stack with a distance between the primary nozzle exit plane and the entrance to the mixing stack of about 0.5 mixing stack diameters without an entrance transition gave the best overall performance. (Author)

• Corporate Authors:

  Naval Postgraduate School

  1 University Circle
  Monterey, CA  United States  93943
• Authors:
  • Moss, C M
• Publication Date: 1977-9

Media Info

• Pagination: 189 p.

Subject/Index Terms

• TRT Terms: Emission control systems; Exhaust gases; Gas turbines; Geometric configurations and shapes; Nozzles
• Old TRIS Terms: Geometric forms
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00174477
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NPS-69PC77092 MS Thesis
• Files: TRIS
• Created Date: May 18 1978 12:00AM