Embedded Flow Control for High Work - Low Reynolds Turbines - BFCONTUR
Abstract
The operational envelope of current platforms is constrained by the weight of the turbine and behavior at off-design, particularly at high altitude. In order to reduce the weight of the engine, high lift - high work turbines have been developed enabling the reduction of total number of stages and overall weight per stage. However, turbine airfoils are known to suffer severe performance degradation at low Reynold number, namely at high altitude. Current high-work - low Reynolds turbines suffer from boundary layer separation, limiting the design loading. At high diffusion and lower Reynolds, the boundary layer cannot withstand the adverse pressure gradient, and detaches from the wall generating a separation bubble. Due to the presence of this recirculated flow region, the power extraction is reduced, the total pressure loses are increased and the overall turbine efficiency is abated. Flow control techniques can mitigate the performance degradation if efficiently implemented in practical designs.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110053
Entities
People
- Guillermo Paniagua
Organizations
- Air Force Office of Scientific Research
- Purdue University
- United States Air Force