Abstract A common requirement for turbomachinery testing facilities is the ability to independently control Mach number and Reynolds number. In practice, this means independent of inlet total pressure exit static in a test facility. paper, we present solution problem with particular applicability large-scale annular facilities. We describe design commissioning combined dump diffuser deswirl sys...

Diffusers and the floor ahead of them create majority downforce a vehicle creates. Outside motorsports, diffuser is relatively unused, although its interaction with ground consistent field study owing to aerodynamic benefits. The flow behavior governed by three fluid-mechanical mechanisms: interaction, underbody upsweep, upsweep. In addition, four different regimes appear when varying ride heig...

The cylindrical volute intake structure possesses some advantages including convenient processing, installation & uninstallation and high machining efficiency. helium turboexpander with this novel in a superconducting cryogenic device is investigated deeply study. Based on the established mathematical model corresponding numerical computation methods, whole flow passage internal of numerically ...

Abstract The main objective of this study is to provide input on the mesh and temperature distribution inside drying chamber for a building-integrated dryer food preservation obtain uniform profile. For this, we varied angle inclination 20° 30° subsequently also speed air flow (1m/s; 1,2 m/s; 1,5 1,7 m/s 2 m/s), at level walls ambient it 25°C inlet set 55°C. results obtained showed that differe...

The objective of this paper is to investigate the space-time frequency spectra for cavitating flows in a mixed-flow pump by using both fast Fourier transform and wavelet transform. Unsteady are numerically investigated Reynolds-averaged Navier-Stokes method, which closured with SST k-ω turbulence model Zwart cavitation model. performance fairly predicted when compared available experimental dat...

This paper presents the numerical and experimental investigation of a straight core annular diffuser normally used in marine gas turbine combustor. The flow in the annular diffuser has been simulated by solving the equations for conservation of mass and momentum. For turbulence modeling the standard k-ε model is employed and the predicted results have been validated with experiments. A five-hol...

Inlet boundary conditions at the supply opening play an important role in accuracy and reliability of computational fluid dynamics (CFD) simulations for indoor airflow. A non-exhaustive overview past CFD ventilation flow generic enclosures indicates that uniform hypotheses inlet are commonly used. However, due to thermal effects a complex air system geometry, constant values airflow quantities ...

The optical reference plane of a J1002 shaped dome diffuser from CMS-Schreder was determined using direct normal spectral solar UV irradiance measurements relative to a flat Teflon diffuser. The spectroradiometers were calibrated relative to the same irradiance standard. The optical reference plane of the shaped J1002 diffuser is 5.3 mm behind the top of the dome with an uncertainty of 1.0 mm. ...

We have developed a new wind turbine system that consists of a diffuser shroud with a broad-ring brim at the exit periphery and a wind turbine inside it. The shrouded wind turbine with a brimmed diffuser has demonstrated power augmentation by a factor of about 2–5 compared with a bare wind turbine, for a given turbine diameter and wind speed. This is because a low-pressure region, due to a stro...