Experimental Study Of Transverse Jet Mapping Using Plif

Abstract

Planar Laser Induced Fluorescence (PLIF) with acetone seeding is applied to measure the scalar fields of an axisymmetric freejet and an inclined jet-in-crossflow as applicable to film cooling. From the scalar fields, jet-mixing and trajectory characteristics are obtained. In order to validate the technique, the canonical example of a nonreacting freejet of Reynolds Numbers 900-9000 is investigated. After validating the technique with the axisymmetric jet, the jet-in-crossflow was tested with various velocity ratios and jet injection angles. Results indicate the degree of wall separation for different injection angles and demonstrate both the time-averaged trajectories as well as near-wall concentration results for varying jet momentum fluxes. Consistent with literature findings, the orthogonal jet trajectory for varying blowing ratios collapses when scaled by the jet-to-freestream velocity ratio and hole diameter, r_d. Similar collapsing is demonstrated in the case of a non-orthogonal jet. Computational Fluid Dynamic (CFD) simualtions using the OpenFOAM software is used to compare predictions with a select experimental case, and yields reasonable agreement.

Publication Date

1-1-2015

Publication Title

53rd AIAA Aerospace Sciences Meeting

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2015-1023

Socpus ID

84980385788 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84980385788

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