The numerical calculations of the flowfield in a planar vortex chamber have been performed. The model is based on conservation laws of mass, momentum and energy for nonsteady two-dimensional compressible gas flow in case of swirl axial symmetry. The processes of viscosity, heat conductivity and turbulence have been taken into account. It was found that transition of kinetic energy of gas into h...

Laser-Doppler velocimetry measurements through a one millimeter hole in the casing of an annular turbine cascade were performed in the endwall region downstream of the blade row. Complementary threehole pressure probe measurements were also taken downstream of the nozzle blades, as well as blade surface pressure measurements. The object of this study was to devise methods for the measurement cl...

ABSTRACT At the same time and location, simultaneous time series of wave slope images and the flowfield beneath water waves were obtained using an integrated set-up including particle-tracking and wave slope instruments. By an especially developed tracking algorithm, hundreds of seeding particles can be traced automatically, measuring the flow field. At the the same location the wave-field was ...

We consider a postprocessor that is able to analyze the flow-field generated by an external (unknown) code so as to determine the error of useful functionals. The residuals generated by the action of a high order finite-difference stencil on a numerically computed flow-field are used for adjoint based a-posteriori error estimation. The method requires information on the physical model (PDE syst...

A modular framework for aerodynamic optimization of complex geometries is developed. By working directly with a parametric CAD system, complex-geometry models are modified and tessellated in an automatic fashion. The use of a component-based Cartesian method significantly reduces the demands on the CAD system, and also provides for robust and efficient flowfield analysis. The optimization is co...

A probabilistic framework is proposed for the optimization of efficient switched control strategies for physical systems dominated by stochastic excitation. In this framework, the equation for the state trajectory is replaced with an equivalent equation for its probability distribution function in the constrained optimization setting. This allows for a large class of control rules to be conside...