Details

Autor(en) / Beteiligte

• Mansour, Michel
• Chokani, Ndaona
• Kalfas, Anestis I
• Abhari, Reza S

Titel

Time-resolved entropy measurements using a fast response entropy probe

Ist Teil von

• Measurement science & technology, 2008-11, Vol.19 (11), p.115401 (14)-115401 (14)

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This 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.