Separation control on high lift low-pressure turbine airfoils using pulsed vortex generator jets
نویسندگان
چکیده
منابع مشابه
Numerical investigations of separation-induced transition on high-lift low-pressure turbine using RANS and LES methods
At low Reynolds numbers, laminar-turbulent transition occurs on the suction side of high-lift low-pressure turbine blades. The prediction of this flow is an important step in low-pressure turbine design. Thus the laminar-turbulent transition must be modeled or resolved. The flow around the high-lift low-pressure turbine blade T106C is predicted using RANS simulations, without and with transitio...
متن کاملDesigning high-lift airfoils using genetic algorithms
A multi-component airfoil design procedure is presented. It is based on a multi-objective genetic optimizer coupled with a boundary layer flow field solver capable of working in high-lift conditions. Examples of unconstrained and constrained lift coefficient maximization are reported.
متن کاملControl of vortex shedding on two- and three-dimensional airfoils
We review and expand on the control of separated flows over flat plates and airfoils at low Reynolds numbers associated with micro air vehicles. Experimental observations of the steady-state and transient lift response to actuation, and its dependence on the actuator, airfoil geometry, and flow conditions are discussed and an attempt is made to unify them in terms of their excitation of periodi...
متن کاملEffects of Front-loading and Stagger Angle on Endwall Losses of High Lift Low Pressure Turbine Vanes
Past efforts to reduce the airfoil count in low pressure turbines have produced high lift profiles with unacceptably high endwall loss. The purpose of the current work is to suggest alternative approaches for reducing endwall losses. The effects of the fluid mechanics and high lift profile geometry are considered. Mixing effects of the mean flow and turbulence fields are decoupled to show that ...
متن کاملA Multifidelity Multiobjective Optimization Framework for High-Lift Airfoils
High-lift devices design is a challenging task as it involves highly complex flow features while being critical for the overall performance of the aircraft. When part of an optimization loop, the computational cost of the Computational Fluid Dynamics becomes increasingly problematic. Methods to reduce the optimization time has been of major interest over the last 50 years. This paper presents a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Thermal Engineering
سال: 2012
ISSN: 1359-4311
DOI: 10.1016/j.applthermaleng.2011.08.028