In this paper we investigate the behavior of higher order Galerkin expansions of the MooreGreitzer model of general transients in aeroengine compression systems. We assume steady state entrainment of the higher Fourier modes of the rotating stall cell which helps establish a framework for a simpli ed numerical analysis of the bifurcating solutions corresponding to rotating stall. For small valu...

This study demonstrates the separation and transition flow behaviour around a 3-D wind turbine blade by analysing blending functions, intermittency, onset Reynolds number in SST Gamma Theta model. The National Renewable Energy Laboratory Phase VI rotor was modelled for analysis. simulations were executed using ANSYS-CFX solver. Extensive comparisons performed to demonstrate accuracy of this num...

Molecular motors and cytoskeletal filaments work collectively most of the time under opposing forces. This opposing force may be due to cargo carried by motors or resistance coming from the cell membrane pressing against the cytoskeletal filaments. Some recent studies have shown that the collective maximum force (stall force) generated by multiple cytoskeletal filaments or molecular motors may ...

The aerodynamics of a stationary wing in turbulent wake are investigated. Force and velocity measurements used to describe the unsteady flow. Various wakes studied with different dominant frequencies length scales. In contrast pre-stall angles attack, time-averaged lift increases substantially at post-stall attack as interacts von Kármán vortex street experiences temporal variations effective a...

The impact of the epidemic on China's economy is huge. By analyzing informal and consulting measures taken by local governments in Sichuan to restore stall post period, this paper classifies refines made urban different sizes cities, puts forward relevant laws, opinions forecasts future trend period. Due epidemic, people's awareness self-protection has increased, have also strengthened preventi...

Results of a high-speed 10-stage axial-flow compressor test involving overall compressor and individual stage performance while stalling and operating in quasi-steady rotating stall are described. Test procedures and data acquisition methods used to obtain the dynamic stalling and quasi-steady in-stall data are explained. Unstalled and in-stall time-averaged data obtained from the compressor op...

Uncomfortable stalls reduce the time cows spend resting and are a risk factor for lameness. Although recommendations for stall dimensions are available, little research supports these recommendations. In this study, kinematic techniques were used to provide the first accurate measures of space used by Holstein dairy cows during lying-down movements in an open space and in a free stall. Cows (n=...

The paper presents the modeling of nonlinear longitudinal aerodynamics using flight data of Hansa-3 aircraft at high angles of attack near stall. The Kirchhoff’s quasi-steady stall model has been used to incorporate nonlinear aerodynamic effects in the aerodynamic model used to estimate the parameters, thereby, making the aerodynamic model nonlinear. The Maximum Likelihood method has been appli...

This article describes a model of financial crisis and explores its implications for public policy. The framework nests the key features of earlier models but is better able to address international architecture questions in a welfare setting. In particular, this framework is used to assess the welfare costs of creditor coordination failure and several recent public policy proposals on reformin...

This paper provides 2D Computational Fluid Dynamics (CFD) investigations, using OpenFOAM package, of the unsteady separated fully turbulent flows past a NACA 0015 airfoil undergoing sinusoidal pitching motion about its quarter-chord axis in deep stall regime at reduced frequency 0.1, free stream Mach number 0.278, and Reynolds number, based on chord length, , . First, eighteen steady-state comp...