Effect of Primary Nozzle Geometry on the Performance of Rectangular Ejectors

971467

05/01/1997

Event
General, Corporate & Regional Aviation Meeting & Exposition
Authors Abstract
Content
An experimental study of the effect of primary nozzle geometry on the performance characteristics of a rectangular subsonic ejector was conducted. Four primary nozzle configurations having rectangular and notched-rectangular exit geometries each with and without boundary layer swirl vanes were studied in these experiments. The ejector and all primary nozzles had equal aspect ratios (defined as the ratio of the large to small dimensions) of 2.8. The primary jet Mach number and Reynolds number were kept constant at M=0.06 and for all cases. After installation of each nozzle in the ejector throat, the mean and fluctuating velocity field at the ejector exit plane and three other downstream stations were mapped using a single hot wire probe. Mass flow ratio, spreading rate, and ejector pumping were calculated from the above measurements. The flow measurements indicated that the ejector's mass flow rate, spread rate, as well as pumping characteristics were enhanced by installation of boundary layer swirl vanes to the exit of the primary nozzles.
Meta TagsDetails
DOI
https://doi.org/10.4271/971467
Pages
13
Citation
Le, P., and Taghavi, R., "Effect of Primary Nozzle Geometry on the Performance of Rectangular Ejectors," SAE Technical Paper 971467, 1997, https://doi.org/10.4271/971467.
Additional Details
Publisher
Published
May 1, 1997
Product Code
971467
Content Type
Technical Paper
Language
English