Pressure distribution on the frontal disk for turbulent flows in a radial diffuser (original) (raw)

Effect of Double Row Diffusers on Performance and Flow Field of a Centrifugal Compressor

2013

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 measurements inside the diffuser passages are carried out and contours of diffuser wall static pressures and flow properties inside the passage are presented.

Performance and wall static pressure measurements on centrifugal compressor diffusers

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2003

The results of experimental studies on performance and wall static pressure distribution in the diffuser passage of a low specific speed centrifugal compressor are given. The performance tests were carried out with vaneless, vane and low-solidity vane diffusers at speeds of 2500, 3000 and 3500r/min. Diffuser wall static pressures measured at 3000r/min for four flow coefficients on the shroud and hub walls are reported. The peak energy coefficient is maximum for the vane diffuser. The operating range of the low-solidity vane diffuser is wider than that of the vane diffuser. At high flow coefficients, the static pressure rise is substantially lower for the vane diffuser, as the incidence on the vane leading edge is very high. The low-solidity vane diffuser did not suffer a large drop in static pressure near the leading edge. The most probable reason may be the large area available in the low-solidity vane diffuser for flow adjustment and weaker flow separation zones on account of the ...