We consider flows past airfoils which are irrotationai and subsonic for low Mach numbers at large distances from the airfoil. If the Mach number at infinity is gradually increased, at some particular value a small supersonic region appears in the flow next to the airfoil. The flow appears to remain without shocks. If the Mach number at infinity is increased still more, a definite observable sho...

In this paper, vortex shedding and suppression are numerically investigated as autonomous non-autonomous dynamical systems respectively. Lagrangian coherent structures (LCSs) used a numerical tool to analyze these systems. These ridges of Finite time Lyapunov exponent (FTLE) which act material surfaces that transport barriers within the flow. Initially, utility LCSs is explored for revealing Fi...

For micro air vehicles (MAV), the precise prediction of aerodynamic force plays an important role. The a comparative low Reynold number (Re) vehicle tends to be affected by different flow modes. In this paper, performance three-dimensional NACA0012 airfoil is studied numerically. A range angles attack ( α) 0°−25° and Reynolds 1000 considered. Mean fluctuating coefficients forces around are anal...

conclusions the high prevalence of vwd among our patients was the same as other previous reports, suggesting low awareness about this disease and under diagnosis of mild cases. results mean age of our patients was 32.5 ± 10.6 years. the level of von willebrand factor in 22.5% and von willebrand activity in 19.6% of patients was abnormal. the prevalence of vwd among patients with menorrhagia was...

Abstract Aircraft engine architectures are currently in the phase of a change to meet future market demands. Certain such novel force engines operate under distorted inflow conditions, which undesirable during flight. It is important characterize effect distortions order understand impact on performance components. This paper discusses design and development test-facility that has capability te...

An efficient semi-numerical framework is used in this paper to analyze the dynamic model of an axially moving beam with a nonlinear attachment composed energy sink and piezoelectric device. The governing equations motion system are derived by using Hamilton’s principle von Karman strain-displacement relation Euler - Bernoulli theory. modeled as lumped mass point mass, spring cubic stiffness lin...

In this paper, we prove the local exact null controllability of the thermoelastic plate model, in the absence of rotational inertia, and under the influence of the (non-Lipschitz) von Kármán nonlinearity. The plate component may be taken to satisfy either the clamped or higher order (and physically relevant) free boundary conditions. In the accompanying analysis, critical use is made of sharp o...