Abstract
The present work describes the application of countercurrent shear flow control to the nonreacting flow in a novel step combustor. The countercurrent shear control employs a suction based approach, which induces counterflow through a gap at the sudden expansion plane. Peak turbulent fluctuation levels, cross-stream averaged turbulent kinetic energy, and cross-stream momentum diffusion increased with applied suction. The control downstream of the step operates via two mechanisms: enhanced global recirculation and near field control of the separated shear layer. The use of counterflow also enhances three dimensionality, a feature that is expected to be beneficial under burning conditions.
Original language | English (US) |
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Pages (from-to) | 438-448 |
Number of pages | 11 |
Journal | Journal of Fluids Engineering, Transactions of the ASME |
Volume | 127 |
Issue number | 3 |
DOIs | |
State | Published - May 1 2005 |