Variable inlet guide vanes (VIGVs) are widely used for flow throttling and also extending the operating range of centrifugal compressors. Although there several studies on effects adding IGVs performance curve compressors, none them have focused number vanes. In current study, high-fidelity three-dimensional numerical simulations carried out to analyze VIGVs with different aerodynamic a single-...

In order to improve the working performance of an Alfalfa air conveyor, a type horizontal screw conveyor with seed stirring function was designed. The process co-simulated by EDEM software and ADAMS software. effects mechanism on population movement characteristics, stress, mass flow rate variation coefficient each index were obtained. results showed that can effectively mobility population, re...

Electrochemical trepanning (ECTr) is an effective method for machining the ruled surface parts. Generally, forward flow mode used in ECTr, under which streamlines at outlet are divergent, resulting obvious patterns and instability of process. In ECTr a diffuser with special structure, lateral adopted to improve uniformity field, thereby improving quality hub. complicated multiphysics coupling T...

Abstract Downsizing and turbocharging are nowadays widely spread techniques in automotive small-size internal combustion engines aimed at reducing the specific fuel consumption without affecting power output. Due to device small dimensions high temperature of exhaust-gases feeding turbine, a relevant amount heat is customarily exchanged between turbine compressor so that classical adiabatic app...

Performance testing identifies many aspects of turbocharger performance. Although, when performance is less than satisfactory, test cell mapping only identifies secondary or tertiary troubles demonstrating inconsistencies with expected performance. Such tasks as seeking out and eliminating efficiency losses or increasing operational surge margin are unrealistic expectations when basing your con...

Abstract. The impetus towards sustainable energy production and access has led to considerable research development on decentralized generators, in particular diffuser-augmented wind turbines. This paper aims characterize the performance of turbines (DAWTs) using high-lift airfoils employing a three-step computational analysis. study is based fluid dynamics, analysis carried out by solving unst...

Satellite instruments operating in the reflective solar wavelength region often require accurate and precise determination of the Bidirectional Reflectance Distribution Function (BRDF) of laboratory-based diffusers used in their pre-flight calibrations and ground-based support of on-orbit remote sensing instruments. The Diffuser Calibration Facility at NASA's Goddard Space Flight Center is a se...

Approach to achieve self-calibration three dimensional (3D) light field display is investigated in this paper. The proposed 3D light field display is constructed up on spliced multiLCDs, lens and diaphragm arrays, and directional diffuser. The light field imaging principle, hardware configuration, diffuser characteristic and image reconstruction simulation are described and analyzed, respective...

We consider the errors introduced by speckle pattern statistics of a diffusing target in the measurement of large displacements made with a self-mixing interferometer (SMI), with sub-λ resolution and a range up to meters. As the source on the target side, we assume a diffuser with randomly distributed roughness. Two cases are considered: (i) a developing randomness in z-height profile, with sta...