Preliminary Experience with High Response Pressure Measurements in a Multistage, High Speed Compressor
Abstract
The investigation of unsteady aerodynamic phenomena within high speed axial turbomachines necessitates the use of a measuring system with a frequency bandwidth of 100-150 kHz. Preliminary experiments to commission and prove a real-time digital data acquisition system have been carried out at RAE Pyestock and are detailed in this paper. The strategy adopted for data analysis is also described, particularly the facility to lock the data capture process to the rotating frame of the machine to carry out phase-locked analysis on-line. Miniature high frequency response transducers (of 500 kHz natural frequency) were used to measure the unsteady total and wall-static pressures within a high speed axial core compressor. Successful protection of the transducer diaphragm was achieved using a thin RTV 511 Silastomer rubber coating. This and further practical experience regarding the use of such transducers within this harsh environment is described. Keywords: Turbomachinery; Axial flow compressors; Unsteady flow; Turbulence; Data acquisition; Unsteady pressure measurement; Great Britain.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1988
- Accession Number
- ADA203484
Entities
People
- J. D. Bryce
- M. A. Cherrett
Organizations
- Royal Aircraft Establishment