To improve fishtail pipe diffuser outflow uniformity, deswirlers and splitters are added inside and after fishtail pipe diffuser passages for a compact centrifugal compressor.

The measurements are carried out in the passages of the following diffusers: vaneless, vane, low solidity vane and partial vane diffusers. The results are presented as contours, axially averaged and mass averaged flow parameters.

To effectively design the diffuser flow passage in a small space with a large turning angle, the novel conformal diffuser not only integrates the radial, bend, and axial sections but also twists each vane in space.

Oct 7, 2016 · The results indicate that at the inlet of the diffuser there are two pressure peaks in a passage cycle. The higher pressure peak relates to the impeller wake and the lower peak is connected with the vortex generated at the diffuser’s leading edge.

Two builds of discrete-passage diffuser were tested, with 30 and 38 separate passages. Both the 30 and 38 passage diffusers investigated showed comparable range of unstalled operation and similar level of overall diffuser pressure recovery.

The detailed internal flow in the diffuser and volute passage near the tongue was measured with a three-hole yaw probe connected to multi-point pressure scanning system with a pressure range of ±2.5 kPa and an accuracy of ±0.20%.

A study of data from two discrete passage diffusers has been carried out, with emphasis on inlet and entry region characteristics. A wide range of inlet conditions has been examined. The total pressure loss occurring in the diffuser entry region has been quantified, as …

In a centrifugal compressor the flow leaves the impel-ler with high absolute velocity at a large angle to the radial direction. The role of the diffuser is to decelerate the flow while it is passing through a divergent passage. Thereby the kinetic energy …

Flow in the vaned diffuser radial pump is characterized by a strong jet–wake flow structure from the impeller and unsteady interactions between the rotating impeller and the stationary diffuser. Such interactions result in large pressure fluctuations both downstream and upstream.

A unique, "Diffuser Passage Compressor" concept is presented which aims at minimizing axial compressor's stall margin deficit with tip clearance opening, i.e. reducing so called tip clearance sensitivity.