The three-dimensional vortex system near the cover of a rectangular package shape mounted in a duct
- Univ. of Maine, Orono, ME (United States). Mechanical Engineering Dept.
- Fern Engineering, Inc., Pocasset, MA (United States)
An experimental program is reported where the three-dimensional vortex adjacent to the cover of a rectangular surface mount package is described. An LDV system is used to measure two velocity components. The wind tunnel model is translated relative to the optical axis of the LDV in order to provide a three dimensional description of the vortex. The limiting streamline pattern on the surface of the block is visualized and is used to determine the direction of flow along the reattachment line. The model is tested over a free stream velocity range from 1.5 m/s to 7.8 m/s. This corresponds to Reynolds number values based upon block length of 1.04 {times} 10{sup 4} and 5.4 {times} 10{sup 4} and represents realistic values for the electronics cooling problem. The model is tested, heated and unheated. The velocity field data show clearly that buoyancy is not important for the range of Gr tested. For the Re increase reported herein, the size of the vortex approximately doubles. The velocity field data and the surface flow visualization provide a qualitative and quantitative description of the vortex system flow.
- OSTI ID:
- 509286
- Report Number(s):
- CONF-950828--; ISBN 0-7918-1702-4
- Country of Publication:
- United States
- Language:
- English
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