Pressure Recovery in a Diffuser for Gas Centrifuge

抄録

The pressure recovery of supersonic flow at very low density was studied in a vane-island type diffuser for gas centrifuge.
A tester of diffuser with a rapidly rotating cylinder was used in experiments. Wallstatic pressures were measured at many points in the diffuser to observe the static pressure distribution. The change of pressure distribution with back pressure and the effect of flow rate were investigated. Pressure distribution showed that the pressure recovery occurred in the converging section. The pressure ratio increased linearly with the back pressure in this experimental range and the effect of flow rate was not observed.
A numerical analysis of the pressure recovery in the channel section of the diffuserwas made by applying the finite difference method to the slender-channel equations. The pressure distribution obtained in experiments could be explained as a result of supersonic compression with reverse flow.