A Closed Circuit Variable Density Air Supply for Turbomachinery Research PUBLIC ACCESS

[+] Author Affiliations
J. P. Gostelow

New South Wales Institute of Technology, Broadway, Sydney, Australia

P. J. Watson

SRC Turbomachinery Laboratory, Cambridge, England

Paper No. 76-GT-62, pp. V01AT01A062; 9 pages
  • ASME 1976 International Gas Turbine and Fluids Engineering Conference
  • Volume 1A: General
  • New Orleans, Louisiana, USA, March 21–25, 1976
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7974-0
  • Copyright © 1976 by ASME


A closed-circuit system is described which has been designed for testing the transonic blading of turbomachinery. The system is installed as the principal faci ity at the S.R.C. Turbomachinery Laboratory. A 1 ½-MW motor-driven compressor installation can be run continuously to produce air speeds up to Mach 1.35 in cascades of 80-cm2 throat area. The overall design of the buildings in relation to the problems of noise and vibration is considered. The choice of plant components and the typical operation of the system are described, including the flexibility achieved by running the compressors singly, in series or in parallel. A PDP-12 computer is used for on-line data analysis, with presentation of compressor characteristics. Details are given of the instrumentation employed including double-pass Schlieren, remote-controlled probe-traversing gear, and the scanning of transducer signals. Typical results from the testing of transonic linear cascades of turbine blades are given. The testing of annular cascades of vibrated blades is also described.

Copyright © 1976 by ASME
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