Stationary and non-stationary Pressure Measurement Technology

The high-precision, stationary differential pressure transducers of the type 9816 from Esterline Pressure Systems enable an exact determination of all stationary pressures during experimental investigations due to their high measuring accuracies. Due to the rack design with exchangeable plug-in modules, the modules of type 9816 have a high flexibility. They are used at TFD for all test rigs. Due to which a fast and uncomplicated exchange and thus an adaptation of the sensors to changed experimental conditions can be realized easily and quickly. Along with the possibility of in-house calibration of the modules, the highest available measurement accuracy is always guaranteed during the tests.

Field of Application

Measurement of steady-state and transient pressures in turbomachinery
Stall Detection

Description

The nonstationary miniature pressure transducers from the manufacturer Kulite are used at the TFD for a wide variety of applications. For example, they are used for stall detection as part of operational monitoring, but are also used for transient measurement of blade profile pressures. Due to their small size as well as the high expertise of TFD's internal sensor workshop, instrumentation with these sensors can be realized at almost any location of the turbomachine. For this purpose, the sensors are integrated into the blading in the TFD sensor workshop in such a way that they do not influence the airfoil flow itself. Furthermore, these sensors are used in the production of transient multi-hole flow vector probes for traversing the flow field within the turbomachine. They are characterized above all by their high temporal resolution in conjunction with the measurement accuracy, which is unique for this size. This also enables the measurement of transient pressures with maximum accuracy. Further information on the pressure measurement technology used in the TFD can be found on the manufacturer pages of Esteline Pressure Systems as well as Kulite.

Picture - Stationary print module NetScanner 9816 — Stationary print module NetScanner 9816

Picture - Instationary 6-hole probe — Instationary 6-hole probe

Picture - Miniature instationary pressure transducer for use in a stator vane — Miniature instationary pressure transducer for use in a stator vane

Specification

	stationary	instationary
Existing measurement ranges	10“ WC, 20“ WC, 1 PSI, 2,5 PSI, 5 PSI, 10 PSI, 15 PSI, 30 PSI, 45 PSI, 100 PSI	5 PSI, 10 PSI, 25 PSI, 50 PSI
Resolution	0,003 % FS	infinitesimal
Measurement accuracy	0,15 % FS ≤ 2,5 PSI 0,05 % FS > 2,5 PSI	0,1 % FS
Sampling rate	max. 100 Messungen/Kanal/Sekunde	max. 100 Messungen/Kanal/Sekunde
Piezoresistive pressure sensors