In order to explore the internal relationship between stall core propagation and flange leakage flow in rotating of a mixed-flow pump, based on k-? turbulence model, SIMPLEC algorithm hexahedral structured grid are used simulate field pump. By setting clearance as 0.2 mm, 0.5 mm 0.8 characteristics unsteady pump under condition near studied, influence pressure fluctuation is analyzed. The resul...

This paper proposes a linear parameter varying (LPV) model reference-based control for fixed-wing unmanned aerial vehicles (UAVs), which achieves agile and high performance tracking objectives in extended flight envelopes, e.g. when near stall or deep stall flight conditions are considered. Each of the considered control loops (yaw, pitch and airspeed) delivers an error model that can be reshap...

The unsteady separated turbulent flow around an oscillating airfoil pitching in a sinusoidal pattern in the regime of low Reynolds number is investigated numerically employing the URANS approach with two advanced turbulence models, namely the RNG kmode and Transition SST model, and the DES approach based on the SST kmodel. A comparison with experimental data shows that the SST kbased D...

A detailed numerical study has been carried out to investigate the effects of leadingedge protuberance as a novel flow-separation control-technique for vertical-axis-windturbine (VAWT). The aerodynamic performance stationary protuberanced blade and an associated H-type Darrieus VAWT made three blades were investigated using unsteady Reynolds-Averaged-Navier-Stokes (URANS) Implicit Large Eddy Si...

Deciphering the mechanisms by which proteins fold remains a substantial challenge for structural biology. In particular, very little is known about cotranslational folding, a process in which folding begins as the nascent protein is still emerging from the ribosome. Recognizing the dearth of methods to study this early folding event, Clark and colleagues present a strategy to stall protein tran...

The memory hierarchy model is a powerful tool that can separate the stall time in a multi-level cache. However, since no tool currently exists that is able to compute this information, it is diicult to validate the model. In this respect, a processor simulator can help. With a simulator, we can directly observe the stall time due to cache misses, and thus obtain cpi 0. We succesfully validate t...

A low-order method is presented for aerodynamic prediction of wings operating at near-stall and post-stall flight conditions. The intended use in design, modeling, simulation. In this method, the flow separation due to stall modeled a vortex lattice framework as an effective reduction camber, or “decambering.” For each section wing, parabolic decambering flap, hinged location section, calculate...