MEMS-based probes for velocity and pressure measurements in unsteady and turbulent flowfields

Rediniotis, Othon K.

doi:10.2514/6.1999-521

Cited by 11 publications

(3 citation statements)

References 26 publications

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“…Further investigations based on the two aforementioned studies show the application of a fast-response cylinder probe in a centrifugal compressor [6][7][8]. Moreover, Rediniotis et al [9] built a MEMS based fast-response five sensor probe for subsonic measurements, in order to test the angular/spatial and temporal characteristics of the probe with signal frequencies of up to 400 Hz. A flush-mounted sensor experiences high loads, which can be reduced by placing the sensor farther inside the probe.…”

Section: Introductionmentioning

confidence: 99%

Development of unsteady multi-hole pressure probes based on fiber-optic pressure sensors

Heckmeier

Iglesias

Kreft³

et al. 2019

Eng. Res. Express

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For measurements of unsteady flow phenomena with multi-hole pressure probes, pressure transducers are integrated in the probe near the probe tip. The application of additive manufacturing enables a wide variation in probe geometries for complex use cases. The spatial characteristics of the unsteady probe are determined by the steady state calibration in a known free-jet wind tunnel. Furthermore, the acoustic/pneumatic line-cavity system, that emerges inside the channels of the probe, is investigated in detail in the temporal calibration. In order to realize multi-hole probes with higher temporal resolution, which can be operated in harsh environments, a fiber-optic pressure sensor is developed. The measurement principle of the fiber-optic sensor is based on the Fabry-Pérot interferometer effect. The sensor is operated differentially with a pressure capillary by either pressurizing the sensor or using the surrounding static pressure as the reference pressure. Besides calibration of the sensor, comparisons with a state-of-the-art piezo-resistive pressure transducer have been performed. The focus of this work is on the reproducibility of both frequency response and amplitude.

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Section: Introductionmentioning

confidence: 99%

Development of unsteady multi-hole pressure probes based on fiber-optic pressure sensors

Heckmeier

Iglesias

Kreft³

et al. 2019

Eng. Res. Express

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“…The advent of Micro-Electrical-Mechanical-Systems (MEMS) has the potential to offer smaller sensors and reduce the size of unsteady probes. Rediniotis and Johansen (1998) examined a 5-hole MEMS probe with a diameter of approximately 1 mm, shown in cross-section in Figure 2. This probe includes a semi-spherical cap that is placed over a silicon chip with pressure sensors and was capable of a maximum frequency response of around 400 Hz.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2. The 5-hole MEMS probe studied by Rediniotis and Johansen (1998). Principles of operation Figure 5 shows a schematic of the novel probe concept.…”

Section: Introductionmentioning

confidence: 99%

A Novel MEMS-Based Probe for Unsteady Aerodynamic Measurements: A Proof-of-Concept Study

Morris

Coull

Dickens

et al. 2020

J. Glob. Power Propuls. Soc.

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A novel MEMS-based probe is described which is capable of measuring unsteady flow angles, total pressure and velocity. Uniquely, this probe uses shear stress sensors to relate the surface streamline directions on the probe face to the freestream flow angles. The probe has the potential to be miniaturised to around 1 mm in diameter and achieve a temporal resolution of up to several 100 kHz. A computational study of virtual calibrations is used to understand how to adjust the probe geometry and sensor locations to maximise the sensitivity and range of the device. The most promising configuration was calibrated experimentally using a large-scale probe to demonstrate the feasibility of the concept.

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The calibration of five-hole pressure probe

Bereznai¹,

Mlynár²

2016

AIP Conference Proceedings

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Abstract. In the laboratory of the Institute of Energy Machinery, Faculty of Mechanical Engineering in Bratislava were produced amount of pressure probes of different designs. Special position among themselves are five-hole pressure probe with tip of sphere or wedge used to determine the velocity vector in a unknown flow fields. Such probes have to be calibrated during blowing an air stream of known velocity magnitude and components of the velocity vector at different angles of attack, when the characteristic information about pressure ratios on a sensitive part of the measuring probe is obtained.

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MEMS-based probes for velocity and pressure measurements in unsteady and turbulent flowfields

Cited by 11 publications

References 26 publications

Development of unsteady multi-hole pressure probes based on fiber-optic pressure sensors

Development of unsteady multi-hole pressure probes based on fiber-optic pressure sensors

A Novel MEMS-Based Probe for Unsteady Aerodynamic Measurements: A Proof-of-Concept Study

The calibration of five-hole pressure probe

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