This paper presents the implementation and results of the airfoil electrothermal anti-ice mathematical model developed in part 1 (Silva, G. A. L, Silvares, O. M., Zerbini, E. J. G. J., “Numerical Simulation of Airfoil Thermal Anti-Ice Operation Part 1: Mathematical Modeling”, Journal of Aircraft, submitted for publication). From flowfield and supercooled water droplet impingement data up to ele...

We attempt to understand visual classification in humans using both psychophysical and machine learning techniques. Frontal views of human faces were used for a gender classification task. Human subjects classified the faces and their gender judgment, reaction time and confidence rating were recorded. Several hyperplane learning algorithms were used on the same classification task using the Pri...

To reduce the computational costs in Large-Eddy Simulations of turbulent flows, a multilevel method is introduced. It relies on the splitting of the turbulent flowfield into several frequency bands in space and time, each band being associated to a computational grid in physical space. The method allows to take into account in a deterministic way the information contained on finer grids, and mi...

An experimental study was performed at the University of Illinois at Urbana-Champaign Low-Speed Wind Tunnel to quantify the performance and flowfleld effects of two-element open-wheel-race-car front wing configurations. Four distinct configurations were tested inand out-of-ground effect and at various speeds (Reynolds numbers), angles of attack, and flap positions. A splitter plate was installe...

The combination of multiplemodules in parallel manner is an important way to achieve the much higher thrust of scramjet engine. For the multiple-modules scramjet engine, when inlet unstarted oscillatory flow appears in a single-module engine due to high backpressure, how to interact with each module by massflow spillage, and whether inlet unstart occurs in other modules are important issues. Th...

The coherent anti-Stokes Raman spectroscopy (CARS) method has recently been used in the United States and Europe to probe several different types of propulsion systems for air vehicles. At NASA Langley Research Center in the United States, CARS has been used to simultaneously measure temperature and the mole fractions of N2, O2 and H2 in a supersonic combustor, representative of a scramjet engi...

Accurate and efficient modeling of shock-layer radiative heat loads is critical for many spacecraft designs. A correlated-k distribution method has been developed for the most important atomic species (N and O), which provides great accuracy with high numerical efficiency for the evaluation of radiative transfer in a hot plasma. Challenges posed by typical nonequilibrium gas conditions and extr...

The FDV method was originally developed by T.J. Chung [3]-[6]. The authors developed and presented a modification to this method named MFDV method in [2]. The aim of this modification was to give the implicitness parameters a deeper physical meaning while maintaining the solution stability and robustness. In the present work the modified flowfield dependent variation method (MFDV) has been test...

This paper is devoted to predict laminar and turbulent heating rates around blunt re-entry spacecraft at hypersonic conditions. Heating calculation of a hypersonic body is normally performed during the critical part of its flight trajectory. The procedure is of an inverse method, where a shock wave is assumed, and the body shape that supports this shock, as well as the flowfield between the sho...

Experimental observations are reported for the laminar flow of a viscoelastic liquid through a symmetrical plane sudden expansion preceded by a gradual contraction from a square duct. As is well known, for Newtonian fluid flow above a critical Reynolds number the flowfield downstream of an expansion becomes asymmetric. For the viscoelastic liquid investigated here the asymmetry is greatly reduc...