which either of the two nozzles, Conical or Petal, may be attached; 2) the secondary flow settling chamber which is annular and coaxial with the primary air line; 3) two venturimeters, one on either side of the secondary settling chamber, for measurement of secondary mass flow rate; 4) bellmouths to facilitate proper entry of the secondary entrained flow; and 5) ejector shroud. Air was used as the working gas for the primary stream. Both nozzles have a throat diameter of 22 mm and area ratio of 1.34 (design pressure ratio = 5:1). Exit Mach number is about 1.7. All tests were done using constant ejector area ratio. Cylindrical acrylic tubes of L/D varying from 4.35 to 0.87 were used for the ejector shroud. Two types of tests were conducted: 1) with no secondary flow and 2) with secondary flow. For tests with no secondary flow, the venturimeters were replaced by end-plates, thus sealing the secondary flow settling chamber from the ambient.
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