Accession Number : AD0776768

Title :   Advanced Ejector Thrust Augmentation Study - Mass Entrainment of Axisymmetric and Rectangular Free Jets.

Descriptive Note : Final rept. Jun 72-Apr 73,


Personal Author(s) : Peschke,William

Report Date : APR 1973

Pagination or Media Count : 67

Abstract : An experimental investigation has been performed to evaluate the entrainment characteristics of nonaxisymmetric (rectangular) primary nozzles for ejector into air application. Data are presented which show the variation in mass entrainment rates of various nozzles as related to isentropic nozzle exit velocity and distance downstream of the nozzle exit. The entrained mass flow is determined by direct measurement for an axisymmetric nozzle and for rectangular nozzles with aspect ratios of 1, 10, 25, and 50. Most of the data presented are for isentropic nozzle exit Mach numbers between about 0.08 and 0.3. Some data are presented for Mach numbers up to about 0.52. All data are for nozzles exhausting into a quicsent atmosphere. (Modified author abstract)

Descriptors :   *Thrust augmentor nozzles, *Air entrainment, *Ejectors, Jet mixing flow, Mass, Axially symmetric flow, Nonaxisymmetric, Rectangular bodies, Subsonic characteristics, Mathematical models, Jets, Model tests, Test methods

Subject Categories : Fluid Mechanics
      Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE