Regulations from the European Union move towards a constant reduction of pollutant emissions to match single-digit goal by 2050. Original equipment manufacturers propose newly designed components for lifetime extension ofgGas turbines that both reduce and allow increasing thermodynamic performance redesigning turbine cooling geometries optimizing secondary air systems. The optimal design intern...

micro-leakage, one of the major reasons for recurrent decays, may lead to uncontrollable flow of liquids, pulp inflammation and peri-apical pathology. the purpose of this in vitro study was to evaluate micro-leakage of pit and fissure sealants after using three different pit and fissure preparation techniques: 1) acid etching, 2) fissure enameloplasty and acid etching, and 3) air abrasion and a...

The tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well cavitation erosion. To better understand structures dynamics of the TLV, large-eddy simulation (LES) is coupled with a homogeneous model to simulate flow around NACA0009 hydrofoil given clearance. numerical results are validated by comparisons experimental measurements. de...

To improve the performance of electrically assisted turbochargers (EATs), influences hub profile and casing on EAT were numerically studied by controlling upper lower endwall profiles. An artificial neural network a genetic algorithm used to optimize profile, considering total pressure ratio isentropic efficiency at peak point. Different performances prototype optimized under variable clearance...

April 10-15, 2016 Abstract A whole-annulus unsteady numerical simulation is carried out to investigate the mechanism of the rotating stall in a 1.5-stage low-speed axial-compressor. By comparing the experimental and numerical results, the numerical results are validated. The numerical simulation captures the most features of the rotating stall of the 1.5-stage compressor observed from the exper...

Of 521 patients with erectile dysfunction in whom a multidisciplinary approach was used, 145 (27.8%) showed venous leakage as (concomitant) etiology of the impotence in dynamic cavernosography. The rate of the maintenance flow corresponded well with the response to a standardized intracavernosal injection of vasoactive drugs (p less than 0.05) in patients with venous leakage. The maintenance fl...

A new notion of Security Boundary is introduced to model multilevel security policies in the scenario of mobile systems, within Cardelli and Gordon’s “pure” Mobile Ambients calculus. Information leakage may be expressed in terms of the possibility for a hostile ambient to access confidential data that are not protected inside a security boundary. A control flow analysis is defined, as a refinem...

In our experiment, an interface between a viscous liquid and air is deformed by a sink flow of constant flow rate to form a sharp tip. Using a microscope, the interface shape is recorded down to a tip size of 1 microm. The curvature at the tip is controlled by the distance h between the tip and the sink. As a critical distance h*is approached, the curvature diverges like 1/(h-h*)3and the tip be...

The tip clearance, a compact gap between the inducer blade and casing wall, is critical to both liquid leakage cavitation-induced forces of turbopump. In this study, we numerically investigate effect clearance on cavitation characteristics an inducer. Six different clearances, 0.1, 0.3, 0.5, 1.0, 1.5, 2 mm, namely Models A–F, were designed evaluate performance, cavity structure, loading, radial...

Anastomotic leakage is considered as an independent risk factor for postoperative mortality after esophagectomy, and an insufficient blood flow in the reconstructed conduit may be a risk factor of anastomotic leakage. We investigated the clinical significance of blood flow visualization by indocyanine green (ICG) fluorescence in the gastric conduit as a means of predicting the leakage of esopha...