Numerical simulations of the transient flow of helium injected into an established background flow of nitrogen were carried out to identify the dominant features of the transient mixing process between these two dissimilar gases. The geometry of interest is composed of two helium slots on either side of a central nitrogen channel feeding into a rectangular mixing chamber that was experimentally designed to give “two-dimensional” flow. Simulations were accomplished on both two- and three-dimensional grids. The 3D solutions employ an unsteady DES approach, while the 2D results are based upon a reduced dimension, “DES-like” method. Results are compared with quantitative experimental measurements of species distributions both in terms of contour plots and local point measurements. The 2D solutions give a reasonable qualitative picture of the transient mixing process in the center of the chamber while also providing quantitative estimates of representative characteristic times for guiding the 3D calculations. The 3D solutions give a reasonable approximation to span-wise variations observed in the experiment.
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July 2011
Research Papers
Numerical Simulation of Start-Up Jets in a Mixing Chamber
Chenzhou Lian,
Chenzhou Lian
Staff Scientist IBM Hudson Valley Research Park, Hopewell Junction
, NY 12533, e-mail:
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Dmytro M. Voytovych,
Dmytro M. Voytovych
Sr Eng/Sci United Technologies Research Center, East Hartford
, CT 06108
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Guoping Xia,
Guoping Xia
Senior Research Associate School of Mechanical Engineering, Purdue University, West Lafayette
, IN 47906
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Charles L. Merkle
Charles L. Merkle
Reilly Professor of Engineering Purdue University, West Lafayette
, IN 47906
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Chenzhou Lian
Staff Scientist IBM Hudson Valley Research Park, Hopewell Junction
, NY 12533, e-mail:
Dmytro M. Voytovych
Sr Eng/Sci United Technologies Research Center, East Hartford
, CT 06108
Guoping Xia
Senior Research Associate School of Mechanical Engineering, Purdue University, West Lafayette
, IN 47906
Charles L. Merkle
Reilly Professor of Engineering Purdue University, West Lafayette
, IN 47906J. Fluids Eng. Jul 2011, 133(7): 071203 (14 pages)
Published Online: July 8, 2011
Article history
Received:
September 1, 2010
Revised:
June 5, 2011
Accepted:
June 6, 2011
Online:
July 8, 2011
Published:
July 8, 2011
Citation
Lian, C., Voytovych, D. M., Xia, G., and Merkle, C. L. (July 8, 2011). "Numerical Simulation of Start-Up Jets in a Mixing Chamber." ASME. J. Fluids Eng. July 2011; 133(7): 071203. https://doi.org/10.1115/1.4004368
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