A Calculation of Penetration of the Jet Issuing Normally into a Cross Flow Across a Wall Boundary Layer

912029

09/01/1991

Event
International Pacific Air & Space Technolgy Conference
Authors Abstract
Content
An Increase in jet penetration due to the wall boundary layer is determined in the flow field including an aerodynamic interference between the wall boundary layer and the jet. The aerodynamic effect of the wall boundary layer is replaced by that of a secondary vortex filament resulting from vorticity in the wall boundary layer. A differential equation governing the increase in jet penetration is derived using the circulation around the secondary vortex filaments, its induced velocity and the empirical decay law of the jet axial velocity along the jet centerline. The circulation around the secondary vortex filament is estimated according to Hawthorne's theory (1)* and expressed in terms of aerodynamic characteristics of the wall boundary layer. A numerical example of the present analysis shows a fairly good agreement with the experiment. This indicates that the used vortex flow model simulates the real flow conditions well.
Meta TagsDetails
DOI
https://doi.org/10.4271/912029
Pages
10
Citation
Sugiyama, Y., "A Calculation of Penetration of the Jet Issuing Normally into a Cross Flow Across a Wall Boundary Layer," SAE Technical Paper 912029, 1991, https://doi.org/10.4271/912029.
Additional Details
Publisher
Published
Sep 1, 1991
Product Code
912029
Content Type
Technical Paper
Language
English