The Effect Of Inclination Angle On Turbulent Quantities Of A Single Row Of Cylindrical Jets In Crossflow

Abstract

This is an experimental investigation into the effect of inclination angle and lateral spacing on the variation of mean/turbulent velocity profiles for a single row of cylindrical jets issuing into a turbulent boundary layer. Extensive velocity measurements are made in the region near injection for a single row of film cooling holes, to determine how hole orientation affects turbulent length scales and aerodynamic performance. Inclination angles of 30°, 35°, 45°, 60°, 75°, and 90° are tested, while the film cooling hole’s length (L/D) and lateral spacing’s (P/D) are fixed for each angle at 4.25 and 3, respectively. The measurement domain exists from x/D=0 to 3, y/D=-1.5 to 1.5 and z/D=0 to 2 at nominal blowing ratios of M=0.5, 1, and 1.5. This data represents an extension of the flow measurements previously available in literature, and supplements companion heat transfer studies performed with the same experimental setup and test specimen. Experimental measurements of turbulence will be expressed by mean and fluctuating velocity, length and time-scales, spectral analysis, and flat plate boundary layer thickness calculations. Such turbulence quantification for a single row of cylindrical holes at various inclination angles will provide assistance for better formulation of boundary conditions and turbulence specification in Computational Fluid Dynamics (CFD) simulations.

Publication Date

1-1-2015

Publication Title

51st AIAA/SAE/ASEE Joint Propulsion Conference

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2015-4198

Socpus ID

85088061291 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85088061291

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