A Conceptual Design Study for a New High Temperature Fast Response Cooled Total Pressure Probe

Brouckaert, Jean-Franc ̧ois; Mersinligil, Mehmet; Pau, M.

doi:10.1115/gt2008-51054

Cited by 3 publications

(5 citation statements)

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“…Figure 11 shows the fast-Fourier-transform (FFT) of a recording at 12500 r/min. The fundamental BPV is 17.05 kHz, and five harmonics, (1) to (5), are clearly seen. The resonance around 137 kHz, (6), is the line-cavity resonance frequency at the flow temperature.…”

Section: Frequency Analysismentioning

confidence: 94%

“…In this article, a short summary of literature will be presented as the full literature review has been presented by the authors in references [4], [5], and [6].…”

Section: State Of the Artmentioning

confidence: 99%

“…The screen and the sensor are cooled by passing the incoming coolant from the inner duct through the channels around the sensor. The probe design in detail has been previously reported by Brouckaert et al [5]. Parametric studies have been carried out using simple one-and twodimensional conjugate heat transfer models, investigating the cooling performance values such as coolant temperatures and cooling rates as a function of environmental conditions including gas temperature and pressure, Mach number, and turbulence intensity.…”

Section: Probe Conceptmentioning

confidence: 99%

“…After the testing of the first prototype on several test vehicles [5,6], the electrical splicing layout has been altered, hermetically sealing the sensor wires from the coolant. Another change for the second prototype was the use of a leadless sensor, where the sensor chip is brazed to the wires instead of a wire bonding process.…”

Section: Manufacturing and Assemblymentioning

confidence: 99%

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High-temperature high-frequency turbine exit flow field measurements in a military engine with a cooled unsteady total pressure probe

Mersinligil

Desset

Brouckaert

2011

Proceedings of the Institution of Mechanical Engineers, Part A:

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The measurement of unsteady pressures within the hot components of gas turbine engines still remains a true challenge for test engineers. Several high-temperature pressure sensors have been developed, but so far, their applications are restricted to unsteady wall static pressure measurements. Because of the severe flow conditions such as turbine inlet temperatures of 1700 C and pressures of 50 bar or more in the most advanced aero-engine designs, few (if any) experimental techniques exist to measure the time-resolved flow total pressure inside the gas path. This article describes the measurements performed at the turbine exit of a military engine with a cooled fast response total pressure probe. The probe concept is based on the use of a conventional miniature piezo-resistive pressure sensor, located in the probe tip to achieve a bandwidth of at least 40 kHz. Due to the extremely harsh conditions, the probe and sensor are heavily water cooled. The probe was designed to be continuously immersed into the hot gas stream to obtain time series of pressure with a high bandwidth and therefore statistically representative average fluctuations at the blade passing frequency (BPV). The experimental results obtained with a second-generation prototype are presented. The probe was immersed into the engine through the bypass duct between turbine exit and flame-holders of the afterburner of a Volvo RM12 engine, at exhaust temperatures above 900 C. The probe was able to resolve the BPV ($17 kHz) and several harmonics up to 100 kHz.

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Section: Frequency Analysismentioning

confidence: 94%

“…In this article, a short summary of literature will be presented as the full literature review has been presented by the authors in references [4], [5], and [6].…”

Section: State Of the Artmentioning

confidence: 99%

Section: Probe Conceptmentioning

confidence: 99%

Section: Manufacturing and Assemblymentioning

confidence: 99%

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High-temperature high-frequency turbine exit flow field measurements in a military engine with a cooled unsteady total pressure probe

Mersinligil

Desset

Brouckaert

2011

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…To overcome this problem, a cooled probe design again based on the use of a commercial piezoresistive sensor has been developed by Brouckaert et al [12] to be continuously immersed in the hot gas path. The probe is 8 mm diameter and is heavily cooled with high pressure water.…”

Section: Introductionmentioning

confidence: 99%

A High Temperature High Bandwidth Fast Response Total Pressure Probe for Measurements in a Multistage Axial Compressor

Mersinligil

Brouckaert

Courtiade

et al. 2012

Journal of Engineering for Gas Turbines and Power

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Over the last decades, fast response aerodynamic probes have been recognized as a robust measurement technique to provide time-resolved flow field data in turbomachinery environments. Still, most of the existing probe designs are restricted to low temperature applications (<120°C) either because of sensor temperature range limitations or packaging issues. Measurements in turbomachines also require a small probe size often with a very high bandwidth which are conflicting constraints difficult to satisfy simultaneously. This contribution therefore presents the development of a novel miniature (0 2.5 mm ) high temperature single sensor total pressure probe, designed for operation up to 250 °C with a very high bandwidth of 250 kHz. The probe main element is a 1.7 mm diameter commercial piezoresistive transducer placed in a Pitot type arrangement with a flush mounted sensor to provide the highest bandwidth. The details ofthe probe design are presented as well as the probe calibrations in pressure and in temperature. The effects of using a thermal compensation module or a sense resistor to monitor the temperature drift are described in the context of measurement uncertainty. The probes were characterized in terms of aerodynamic characteristics versus flow angle and Mach number. Shock tube tests have shown a dynamic response ofthe probe with sensor resonance frequencies well over 300 kHz, with a flat frequency range up to 250 kHz. Two probe prototypes were manufactured and first used in the V/j-stage high speed axial compressor CREATE ofthe LMFA at Ecole Centrale de Lyon in France. The probes were traversed at each interblade row plane up to temperatures of 180°C and absolute pressure of 3 bars. The probe was able to resolve the high blade passing frequencies (^16 kHz) and several harmonics including rotor-stator interaction frequencies up to 200 kHz. Besides the average total pressure distributions from the radial traverses, phase-locked averages and random unsteadiness are presented. The probe spatial and temporal resolutions are discussed in the context of those results.

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Application of Fiber-Optical Microphone for Thermo-Acoustic Measurements

Konle

Paschereit

Röhle

2010

Journal of Engineering for Gas Turbines and Power

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A high temperature resistant fiber-optical microphone (FOM) was developed and successfully applied in a combustion chamber at a thermal power of 8.4 kW to measure thermo-acoustic oscillations at a frequency of 85 Hz and a sound pressure level of 154 dB. The sensor head temperature was estimated to ∼1000 K. The core of the optical setup used for the FOM is a Fabry–Perot interferometer. To create an acoustical sensor based on this type of interferometer, a new method of generation and postprocessing of the interference signal was developed. The simple replaceability of the sensor membrane reduces the requirements concerning the sensor handling compared with conventional condenser microphones and allows the adaptation of the sensor sensitivity to its application case changing the membrane stiffness.

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A Conceptual Design Study for a New High Temperature Fast Response Cooled Total Pressure Probe

Cited by 3 publications

References 0 publications

High-temperature high-frequency turbine exit flow field measurements in a military engine with a cooled unsteady total pressure probe

High-temperature high-frequency turbine exit flow field measurements in a military engine with a cooled unsteady total pressure probe

A High Temperature High Bandwidth Fast Response Total Pressure Probe for Measurements in a Multistage Axial Compressor

Application of Fiber-Optical Microphone for Thermo-Acoustic Measurements

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