Rotating stall waves that travel against the direction of rotor rotation are reported for the first
time and a new, low-order analytical approach to model centrifugal compressor stability is …

Despite its simple geometry, the turbulent flow in vaneless diffusers is asymmetric and highly
skewed. In the present work, a frozen eddy viscosity approach was employed to investigate …

This paper presents an experimental analysis of the unsteady phenomena developing in a
vaneless diffuser of a radial flow pump. Partial flow operating conditions were investigated …

Heightened interest in visualizing the flow structure under critical conditions for aero-engine
led to further understanding of the underlying physical mechanism as well as to a better …

In spite of a low circumferential Mach number the sound of isolated centrifugal fan impellers
is sometimes dominated by distinctive tones at blade passing frequency (BPF) and integer …

Rotating stalls in vaneless diffusers are studied from the viewpoint that they are basically two-
dimensional inviscid flow instability under the boundary conditions of vanishing velocity …

The internal flow structures in a vaneless diffuser of a radial pump are experimentally and
numerically investigated. Numerical simulations are used for investigating the prominent …

A stall inception model of centrifugal compressors is developed on the basis of the global
stability analysis in the present paper. This model takes specific flow patterns and impeller …

In this paper the concept of 'quasi-dynamic'pressure measurements is introduced and used
in order to obtain compressor spectral maps describing the process of surge onset in a …

Unsteady flow patterns throughout a centrifugal compressor system during the rotating stall
and the surge were measured experimentally. Various kinds of unsteady behavior of the …