Unsteady Surface Pressure Measurements on Trailing Edge Serrations Based on Digital MEMS Microphones.

Sanders, Martinus P.J.; Santana, Leandro D. de; Azarpeyvand, Mahdi; Venner, Cornelis H.

doi:10.2514/6.2018-3290

Cited by 12 publications

(8 citation statements)

References 22 publications

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“…White et al (2012) has used a MEMS microphone array for wall pressure spectra measurement in the turbulent boundary layer at 0-0.6 Mach numbers. Similarly, Sanders et al (2018) studied the unsteady wall pressures at the trailing edge of a 3D printed NACA0012 airfoil. In this work, digital MEMS microphones were used to study turbulent boundary layer noise at Re range of 20,000-700,000.…”

Section: Aerospace Applicationsmentioning

confidence: 99%

A review of principles of MEMS pressure sensing with its aerospace applications

Javed

Mansoor

Shah

2019

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Purpose Pressure, being one of the key variables investigated in scientific and engineering research, requires critical and accurate measurement techniques. With the advancements in materials and machining technologies, there is a large leap in the measurement techniques including the development of micro electromechanical systems (MEMS) sensors. These sensors are one to two orders smaller in magnitude than traditional sensors and combine electrical and mechanical components that are fabricated using integrated circuit batch-processing technologies. MEMS are finding enormous applications in many industrial fields ranging from medical to automotive, communication to electronics, chemical to aviation and many more with a potential market of billions of dollars. MEMS pressure sensors are now widely used devices owing to their intrinsic properties of small size, light weight, low cost, ease of batch fabrication and integration with an electronic circuit. This paper aims to identify and analyze the common pressure sensing techniques and discuss their uses and advantages. As per our understanding, usage of MEMS pressure sensors in the aerospace industry is quite limited due to cost constraints and indirect measurement approaches owing to the inability to locate sensors in harsh environments. The purpose of this study is to summarize the published literature for application of MEMS pressure sensors in the said field. Five broad application areas have been investigated including: propulsion/turbomachinery applications, turbulent flow diagnosis, experimentalaerodynamics, micro-flow control and unmanned aerial vehicle (UAV)/micro aerial vehicle (MAV) applications. Design/methodology/approach The first part of the paper deals with an introduction to MEMS pressure sensors and mathematical relations for its fabrication. The second part covers pressure sensing principles followed by the application of MEMS pressure sensors in five major fields of aerospace industry. Findings In this paper, various pressure sensing principles in MEMS and applications of MEMS technology in the aerospace industry have been reviewed. Five application fields have been investigated including: Propulsion/Turbomachinery applications, turbulent flow diagnosis, experimental aerodynamics, micro-flow control and UAV/MAV applications. Applications of MEMS sensors in the aerospace industry are quite limited due to requirements of very high accuracy, high reliability and harsh environment survivability. However, the potential for growth of this technology is foreseen due to inherent features of MEMS sensors’ being light weight, low cost, ease of batch fabrication and capability of integration with electric circuits. All these advantages are very relevant to the aerospace industry. This work is an endeavor to present a comprehensive review of such MEMS pressure sensors, which are used in the aerospace industry and have been reported in recent literature. Originality/value As per the author’s understanding, usage of MEMS pressure sensors in the aerospace industry is quite limited due to cost constraints and indirect measurement approaches owing to the inability to locate sensors in harsh environments. Present work is a prime effort in summarizing the published literature for application of MEMS pressure sensors in the said field. Five broad application areas have been investigated including: propulsion/turbomachinery applications, turbulent flow diagnosis, experimental aerodynamics, micro-flow control and UAV/MAV applications.

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Section: Aerospace Applicationsmentioning

confidence: 99%

A review of principles of MEMS pressure sensing with its aerospace applications

Javed

Mansoor

Shah

2019

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“…Smaller and affordable sensors can be installed near the edges of the model with ease. This enables measurements on the surface of trailing-edge serrations, as demonstrated in Sanders et al [19], to cover the necessary spatial resolution and without the limitations for the flow speed and frequency range from PIV techniques.…”

Section: Introductionmentioning

confidence: 99%

Wall pressure fluctuations over a serrated trailing edge at different angles of attack

Pereira

Avallone

Ragni

2021

Aiaa Aviation 2021 Forum

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“…Both authors do not mention a problem with a low acoustic overload point. Sanders et al [ 10 ] embedded digital MEMS microphones in trailing-edge serrations in order to measure the hydrodynamic coherence length. They state that MEMS microphones with a higher acoustic overload point should be used for Reynolds numbers larger than

due to problems with signal clipping.…”

Section: Introductionmentioning

confidence: 99%

Road to Acquisition: Preparing a MEMS Microphone Array for Measurement of Fuselage Surface Pressure Fluctuations

et al. 2021

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Preparing and pre-testing experimental setups for flight tests is a lengthy but necessary task. One part of this preparation is comparing newly available measurement technology with proven setups. In our case, we wanted to compare acoustic Micro-Electro-Mechanical Systems (MEMS) to large and proven surface-mounted condenser microphones. The task started with the comparison of spectra in low-speed wind tunnel environments. After successful completion, the challenge was increased to similar comparisons in a transonic wind tunnel. The final goal of performing in-flight measurements on the outside fuselage of a twin-engine turboprop aircraft was eventually achieved using a slim array of 45 MEMS microphones with additional large microphones installed on the same carrier to drawn on for comparison. Finally, the array arrangement of MEMS microphones allowed for a complex study of fuselage surface pressure fluctuations in the wavenumber domain. The study indicates that MEMS microphones are an inexpensive alternative to conventional microphones with increased potential for spatially high-resolved measurements even at challenging experimental conditions during flight tests.

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Unsteady Surface Pressure Measurements on Trailing Edge Serrations Based on Digital MEMS Microphones.

Cited by 12 publications

References 22 publications

A review of principles of MEMS pressure sensing with its aerospace applications

A review of principles of MEMS pressure sensing with its aerospace applications

Wall pressure fluctuations over a serrated trailing edge at different angles of attack

Road to Acquisition: Preparing a MEMS Microphone Array for Measurement of Fuselage Surface Pressure Fluctuations

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