Optical Fibre Aerodynamic Probes for Total Pressure and Total Temperature Measurement in Turbomachinery

Optical fibre sensors offer the prospect of miniature aerodynamic probes for highly localised flow measurements in aerospace wind tunnels and turbomachines. We discuss the design and construction of optical fibre sensors for temperature and pressure. The temperature sensors consist of multilayer coatings deposited on the fibre end face from which the reflected intensity is temperature-dependent. Two sensors were incorporated in a dual heated probe to measure total temperature. The pressure sensors are miniature diaphragms in which pressure-induced deflection is measured interferometrically in reflection. We present results from initial trials made in unsteady flow in a single stage research turbine, in which total temperature data with harmonic components up to 30 kHz and total pressure signals up to 230 kHz were recorded.

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Optical fibre probes for total pressure and total temperature measurement in a turbine test rig

13th International Conference on Optical Fiber Sensors ◽

10.1117/12.2302001 ◽

1999 ◽

Cited By ~ 1

Author(s):

J. S. Barton

Keyword(s):

Temperature Measurement ◽

Optical Fibre ◽

Total Pressure ◽

Test Rig ◽

Total Temperature

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Optical-fibre sensors using micromachined silicon resonant elements

IEE Proceedings D Control Theory and Applications ◽

10.1049/ip-d.1988.0053 ◽

1988 ◽

Vol 135 (5) ◽

pp. 353 ◽

Cited By ~ 10

Author(s):

R.E. Jones ◽

J.M. Naden ◽

R.C. Neat

Keyword(s):

Optical Fibre ◽

Optical Fibre Sensors

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Optical Fibre Sensors 18 (OFS-18)

Measurement Science and Technology ◽

10.1088/0957-0233/18/10/e01 ◽

2007 ◽

Vol 18 (10) ◽

Author(s):

Julian D C Jones ◽

Ralph P Tatam

Keyword(s):

Optical Fibre ◽

Optical Fibre Sensors

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France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes

Sensors ◽

10.3390/s17061377 ◽

2017 ◽

Vol 17 (6) ◽

pp. 1377 ◽

Cited By ~ 17

Author(s):

Sylvie Delepine-Lesoille ◽

Sylvain Girard ◽

Marcel Landolt ◽

Johan Bertrand ◽

Isabelle Planes ◽

...

Keyword(s):

Optical Fibre ◽

State Of The Art ◽

Radioactive Wastes ◽

Intermediate Level ◽

Optical Fibre Sensors ◽

High Level

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Unsteady Three-Dimensional Analysis of Inlet Distortion in a Transonic Fan

Fluids Engineering ◽

10.1115/imece2006-13145 ◽

2006 ◽

Author(s):

Peng Sun ◽

Guotal Feng

Keyword(s):

Shock Wave ◽

Total Pressure ◽

Large Scale ◽

Three Dimensional ◽

Navier Stokes ◽

Inlet Distortion ◽

Flow Loss ◽

Large Scale Vortex ◽

Total Temperature ◽

Transonic Fan

A time-accurate three-dimensional Navier-Stokes solver of the unsteady flow field in a transonic fan was carried out using "Fluent-parallel" in a parallel supercomputer. The numerical simulation focused on a transonic fan with inlet square wave total pressure distortion and the analysis of result consisted of three aspects. The first was about inlet parameters redistribution and outlet total temperature distortion induced by inlet total pressure distortion. The pattern and causation of flow loss caused by pressure distortion in rotor were analyzed secondly. It was found that the influence of distortion was different at different radial positions. In hub area, transportation-loss and mixing-loss were the main loss patterns. Distortion not only complicated them but enhanced them. Especially in stator, inlet total pressure distortion induced large-scale vortex, which produced backflow and increased the loss. While in casing area, distortion changed the format of shock wave and increased the shock loss. Finally, the format of shock wave and the hysteresis of rotor to distortion were analyzed in detail.

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