The NASA Subsonic Jet Particle Image Velocimetry (PIV) Dataset (Paperback) (ISBN-13: 9781289146221)

Many tasks in fluids engineering require prediction of turbulence of jet flows. The present document documents the single-point statistics of velocity, mean and variance, of cold and hot jet flows. The jet velocities ranged from 0.5 to 1.4 times the ambient speed of sound, and temperatures ranged from unheated to static temperature ratio 2.7. Further, the report assesses the accuracies of the data, e.g., establish uncertainties for the data. This paper covers the following five tasks: (1) Document acquisition and processing procedures used to create the particle image velocimetry (PIV) datasets. (2) Compare PIV data with hotwire and laser Doppler velocimetry (LDV) data published in the open literature. (3) Compare different datasets acquired at the same flow conditions in multiple tests to establish uncertainties. (4) Create a consensus dataset for a range of hot jet flows, including uncertainty bands. (5) Analyze this consensus dataset for self-consistency and compare jet characteristics to those of the open literature. The final objective was fulfilled by using the potential core length and the spread rate of the half-velocity radius to collapse of the mean and turbulent velocity fields over the first 20 jet diameters.

Author: Nasa Technical Reports Server (Ntrs),James Bridges,Mark P. Wernet
ISBN-10: 1289146225
ISBN-13: 9781289146221
Publisher: Bibliogov
Language: English
Published: 06/28/2013
Pages: 60
Format: Paperback
Weight: 0.28lbs
Size: 9.69h x 7.44w x 0.12d