Accession Number:

AD0668066

Title:

INVESTIGATION OF LOW-CAPACITY HIGH-PRESSURE STAGES OF CENTRIFUGAL COMPRESSORS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1967-09-13

Pagination or Media Count:

26.0

Abstract:

In view of the importance to contemporary turbocompressor design of increasing the efficiency of low-capacity, high-pressure, centrifugal compressors, and the difficulties engendered by the small discharge volumes, the paper summarizes and evaluates the results obtained in tests of such compressor stages. Tests were carried out on 9 configurations of intermediate stages impeller-diffuser-return bend and channel and 3 configurations of terminal stages impeller-diffuser. All the impellers had a relative width b2D2 of approximately 0.02 the intermediate stage impellers had a diameter D2 of 352 mm and were tested at tip speeds of 300-315 msec., while the terminal stage impellers were 220-256 mm in diameter and were tested at 196-229 msec. Three types of diffusers channeled, vaned and vaneless were used for the intermediate stages, while the terminal stages were tested only with vaned diffusers. The effectiveness of a particular stage was evaluated on the basis of the stage efficiency, impeller efficiency, diffuser efficiency, stage pressure coefficient, stage pressure ratio, impeller pressure ratio, drag coefficient of the stationary parts, relative loss coefficient of the stagnation pressure, degree of reaction, Mach number, Reynolds number, flow coefficient, discharge rate and the angles of incidence of flow. Author

Subject Categories:

  • Hydraulic and Pneumatic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE