High Work, High-Efficiency Turbines for Uninhabited Aerial Vehicles (UAVs).

摘要

This report documents the activities and results of an AFOSR-funded, in-house, basic research effort. The effort was focused on the fluid mechanics and heat transfer that is associated with advanced turbine aerodynamic designs, particularly for small engines. The objectives of this task were to identify and evaluate loss mechanisms for very highly loaded turbines and turbines intended to operate at low Reynolds number, and investigate passive and fluidic techniques for the control of separation, reattachment, blade row outlet air angle deviations, secondary flows, and similar loss producing phenomena. The results are applicable to both military and civil applications of gas turbine engines. The following titles published in professional journals and conference proceedings are provided in the appendix: 'Secondary Flow Loss Reduction Through Blowing for a High-Lift Front-Loaded Low Pressure Turbine Cascade' 'Surface Stress Sensitive Film as a Separation Control Sensor' 'An Investigation of Reynolds Lapse Rate for Highly Loaded Low Pressure Turbine Airfoils with Forward and Aft Loading' 'Experimental Comparison of DBD Plasma Actuators for Low Reynolds Number Separation Control' 'Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring - Part I: Airfoil Design' 'Endwall Loss Reduction of High Lift Low Pressure Turbine Airfoils Using Profile Contouring - Part II: Validation' 'Endwall Loss and Mixing Analysis of a High Lift Low Pressure Turbine Cascade' 'Surface Stress Sensors for Closed Loop Low Reynolds Number Separation Control' (dissertation).