A Detailed Experimental And Numerical Investigation Of Flow Physics In A Single Row Narrow Impingement Channel Using Piv, Les And Rans

Abstract

The flow physics of multiple, confined impinging jets are complex and still not fully understood. The present work shows detailed information of flow phenomena using Particle Image Velocimetry (PIV) in a single row narrow impingement channel. PIV measurements were taken at a plane normal to the target wall along the jet centerline for five jets. The Reynolds number based on jet diameter was 15,000. To support experimental data, wall modeled Large Eddy Simulation (LES), and RANS were performed in the same channel geometry. To understand the fundamental behavior in a multiple jet impingement problem, accurate information of the three- dimensional, instantaneous flow field is necessary. The current state of the art RANS models are not sufficient to provide insight about the unsteady behavior of the flow field, and turbulent characteristics associated with heat transfer. Results from the RANS and LES simulations are compared with Particle Image Velocimetry (PIV) data. The results obtained from LES reveals more accurate information on impingement flow phenomena where experimental techniques are limited, and the typical RANS models yield an erroneous result. The accuracy of LES in predicting the flow field of an impingement problem is also presented the in the current work as it is validated against experimental flow field measured through PIV.

Publication Date

1-1-2016

Publication Title

52nd AIAA/SAE/ASEE Joint Propulsion Conference, 2016

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2016-4743

Socpus ID

85088204847 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85088204847

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