The present paper reports measurements carried out in a centrifugal compressor equipped with double row of low solidity partial vane diffuser. Performance of the compressor is measured with three sets of double row diffusers with different radial spacing between the diffusers. From these measurements best configurations are identified and static pressures on the diffuser walls and probe measure...

An implication of a turbine current is the development wake, reduced speed flow, thus affecting performance an adjoined turbine. The aim this study to examine wake properties offer basic framework for exploration efficient arrangements through OpenFOAM source package and entropy production theory. results indicate that diffuser inlet produces largest rate; however, dissipates quickly after roto...

The inlet and outlet size, number location have a significant influence on the thermal environment indoor air distribution for temperature velocity. In this work, numerical experimental studies were performed to examine influences of distribution, location, movement indoor. Also, separation amount extracted has been investigated in study. To provide comfortable occupants, important factors such...

The swirling flow in a diffuser has been studied using the stereo PIV technique. DANTEC hardware and software were used for experiment. water pipe inlet set spinning by introducing tangential jet flow. Both piping of circular cross-section, however casing had rectangular (square) cross-section. plane measurement was located perpendicular to within diffuser. two cameras with Scheinpflug lens mou...

Preliminary note Uniformity of the radial air jet issuing from the ceiling vortex diffuser with side entry plenum box was investigated experimentally. Two different cases of diffuser plenum box design were used: plenum box with perforated plate and plenum box without perforated plate. Air jet velocities were measured under isothermal conditions circumferentially around a diffuser. It was found ...

This paper presents an optimization design method for centrifugal compressors based on one-dimensional calculations and analyses. It consists of two parts: (1) centrifugal compressor geometry optimization based on one-dimensional calculations and (2) matching optimization of the vaned diffuser with an impeller based on the required throat area. A low pressure stage centrifugal compressor in a M...

Demand control of the air distribution systems is crucial to satisfactory thermal environment under variable heat gain conditions in an energy efficient manner. In this study, airflow patterns, ventilation performance and local comfort have been experimentally investigated mock-up meeting office rooms with a volume (VAV) system. The Active Diffuser, which had constant inlet velocity, was compar...

Preliminary tests on the feasibility of using conductivity measurements for diffuser control have shown that brix and conductivity profiles along a diffuser are very similar in shape. The influence of temperature, concentration, pH-value, nonsolubles and sulphated ash on conductivity of cane juice was investigated and simultaneous on-line measurements were carried out to establish shortand long...