An experimental study of heated circular and rectangular jets emitting into a crossflow

Blake E. Johnson, Greg Elliott, Kenneth T. Christensen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermocouple measurements are performed in the spanwise-wall-normal plane at four measurement locations downstream of raised circular and rectangular stacks with the latter oriented with its major axis aligned both parallel and perpendicular to the crossflow. Exit velocity at the jet centerline is 50 m/s, exit temperature is either 425 K or 600 K, and the crossflow velocity is 10 m/s or 30 m/s. This parameter space yields blowing ratios in the range 0.89-4.14. The thermal centroid is used to characterize the plume trajectory and the spreading of the jet is determined based on a threshold temperature. The plume trajectory using this definition does not collapse cleanly to a common curve as in published studies of isothermal jets in crossflow wherein plume trajectory is defined using the velocity field, though the range of blowing ratios investigated here is relatively low compared to many other studies for which this scaling breaks down for blowing ratios less than about 4. The downstream spreading of the plumes, quantified by the core heated area versus downstream distance, shows consistent power-law behavior regardless of geometry, orientation and initial velocity and temperature conditions.

Original languageEnglish (US)
Title of host publication40th AIAA Fluid Dynamics Conference
StatePublished - Dec 2 2010
Event40th AIAA Fluid Dynamics Conference - Chicago, IL, United States
Duration: Jun 28 2010Jul 1 2010

Publication series

Name40th AIAA Fluid Dynamics Conference

Other

Other40th AIAA Fluid Dynamics Conference
CountryUnited States
CityChicago, IL
Period6/28/107/1/10

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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