Michel Mansour et al 2008 Meas. Sci. Technol. 19 115401 doi:10.1088/0957-0233/19/11/115401
Michel Mansour1, Ndaona Chokani1, Anestis I Kalfas2 and Reza S Abhari1
Show affiliationsThis paper describes a recently developed miniature fast response entropy probe and its application in the turbomachinery facilities at ETH Zurich. The development of the probe is motivated by the need to more clearly document the loss generation mechanisms in the harsh environment of turbomachines. The probe is comprised of a piezoresistive sensor and a pair of thin-film gauges that measure the unsteady pressure and temperature, respectively. The unsteady relative entropy can thus be determined. The design, manufacture and calibration of the probe are first presented in detail. Its application to detail the unsteady entropy field, and associated losses, in a centrifugal compressor, axial turbine and film cooling flows are then described.
05.70.Ce Thermodynamic functions and equations of state
89.20.Bb Industrial and technological research and development
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
Issue 11 (November 2008)
Received 12 November 2007, in final form 1 July 2008
Published 17 September 2008
Michel Mansour et al 2008 Meas. Sci. Technol. 19 115401
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