Optimization of a Turbine Blade Performance Due to Active Control of the Vortex Dynamics
Abstract
Geometry and thermal stratification of the flow around a turbine blade specify this flow as one affected by buoyancy and centrifugal forces. An approach is proposed and tested of a boundary-layer control under body forces using generation of counter-rotating streamwise vortices that are an inherent vortical structure of such flows. The active mode of vortex generation is realized due to an imposed surface temperature gradient periodic in the spanwise direction which must be correlated with basic flow parameters. Values of two independent variables temperature gradient and spanwise scale of induced vortices can be adjusted to current flow conditions thus changing the vortex dynamics in a favorable way. Velocity fields and spectrum redistribution in boundary layers with embedded streamwise vortices show efficiency and prospects of the proposed method to control flow characteristics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2001
- Accession Number
- ADP011160
Entities
People
- N. Yurchenko
- R. Rivir
Organizations
- Air Force Research Laboratory