Fluctuating Pressure and Velocity Fields in the Near Field of a Round Jet (Turbulent, Shear Layer, Triple-Wire, Self-Preserving, Hot)

A new analysis algorithm for analyzing signals of a triple-wire anemometer probe is presented which describes the performance of the hot-wire probe and shows the ambiguity in interpretation of the three effective cooling velocities for a range of flow vector directions. Jorgensen's (1971) cooling law for cylinders inclined to the flow vector is adopted. Inverted velocity vectors are multiple but a uniqueness domain, within which the vector coinciding with the true velocity vector can be singled out, is defined. Samples of linearized voltages were taken in the turbulent shear layer of a 6.35 cm diameter jet and analyzed by the algorithm. The results appear to support the methodology of the algorithm. The mechanisms that cause some of the samples to reside outside the realizable domain are discussed.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Chang, Paul Hsin-Pei

• Engineering, Mechanical

Identifier

(UMI)AAI8521737

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/70130