Hot-wire anemometry techniques used to document laminar-to-turbulent transition in oscillating flow are discussed, and two transition mechanisms proposed by J. R. Seume (1988) are reviewed. Reliable near-wall data, and the convergence of ensemble-averaged velocities and rms velocity fluctuations will aid in evaluating wall shear stresses and calculating various boundary-layer parameters. Special consideration was given to a detailed measurement program which documents transition at different axial positions for the space power research engine (SPRE) operating point. Future work on the effect of entry geometry and measurements of heat transfer are outlined. In order to better simulate flow conditions in actual Stirling engine heat exchangers, the effects of various inflow geometries are investigated. Once the hydrodynamic conditions in the test section are documented, a measurement program to assess the effect of flow oscillation on heat transfer will commence.
|Original language||English (US)|
|Number of pages||6|
|Journal||Proceedings of the Intersociety Energy Conversion Engineering Conference|
|State||Published - Dec 1 1990|
|Event||Proceedings of the 25th Intersociety Energy Conversion Engineering Conference - IECEC '90 - Reno, NV, USA|
Duration: Aug 12 1990 → Aug 17 1990