Diffuser augmented wind turbines (DAWTs) can increase mass flow through the rotor substantially, but have often failed to fulfill expectations. We address high-performance diffusers, and investigate the design requirements for a DAWT rotor to efficiently convert the available energy to shaft energy. Several factors can induce wake stall scenarios causing significant energy loss. The causality b...

Diffuser technology placed around hydrokinetic rotors may improve the conversion of fluid’s kinetic energy into shaft power. However, rotor blades are susceptible to phenomenon cavitation, which can impact overall power efficiency. This paper presents development a new optimization model applied shrouded by diffuser. The proposed geometry takes account effect cavitation inception. main contribu...

Design and manufacturing of a high performance micro-hydro-kinetic turbine is discussed in the present paper. The main goal is manufacturing an equipped experimental model of hydro-kinetic turbine with highest energy absorption from water current. A multi-shape ducted turbine comprised of a multi-part diffuser was manufactured that can be converted to many experimental models for studying vario...

the paper describes an investigation about the application of the new multiple-impedance discontinuities model for optimizing profile diffuser barriers. the new multiple-impedance discontinuities model is much faster than the numerical method, thus it is used in an optimization process. the a-weighted insertion loss was used for the traffic noise spectrum. the result of optimization, which is d...

In this paper considered the engineering analysis of a diffuser with closed-type wind power plant by converting kinetic energy oncoming into electrical energy. The study turbine was carried out in order to increase efficiency design is converted finite element model for aerodynamic calculations. investigated changing angle attack diffuser, various options its parameters find most optimal condit...

The application of machine learning to solve engineering problems is in extremely high demand. This article proposes a tool that employs algorithms for predicting the frequency response an unsteady vortex phenomenon, precessing core (PVC), occurring conical diffuser behind radial swirler. model input parameters are two components time-averaged velocity profile at cone inlet. An empirical databa...

The demands to apply transonic centrifugal compressor have increased in the advanced gas turbine engines. Various techniques are used increase aerodynamic performance of compressor. effects inclined leading edges diffuser vanes a on flow-field unsteadiness and noise generation investigated by solving compressible, three-dimensional, transient Navier–Stokes equations. Diffuser with various incli...

In this study the diffuser has different functions. You may already know function of diffuser. Diffuser Has a to clean air from viruses, dust, and pollution. Usually, is mixed with essential oil give nice scent around room. The purpose was examine physics concept by knowing ratio relationship between water volume time, time temperature in mode 1 2. research can be implemented. There are several...

This study aims to determine whether the combination formulation of essential oils between cinnamon and citronella can be used as an aromatherapy reed diffuser preparation that has acted anti-stress aromatherapy. The method in this research is experimental laboratory with a post-test only control group design using mice test animals. population was Cinnamon (Cinnamomum verum) (Cymbopogon nardus...