Fiber optic sensing technologies potentially applicable for hypersonic wind tunnel harsh environments

Qiu, Huacheng; Min, Fu; Yang, Yanguang

doi:10.1186/s42774-020-00033-y

Cited by 14 publications

(7 citation statements)

References 75 publications

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“…A nominal Mach 12 nozzle was used in this experiment, the freestream Mach number Ma was calibrated to be 12.7. The average stagnation temperature T 0 and pressure P 0 were 600 K and 2.0 MPa respectively, the unit Reynolds number Re L was calculated to be 2.26×10 6 /m, and the Reynolds number Re based on the model length was 4.44×10 5 . In order to prevent gas condensation, dry pure nitrogen was used as the flow medium.…”

Section: Methodsmentioning

confidence: 99%

Hypersonic Aerodynamic Force Balance Using Temperature Compensated Semiconductor Strain Gauges

Qiu

Yang

Sun

et al. 2023

Preprint

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Metal foil strain gauges remain the state-of-the-art transducers for wind tunnel balance. While strain gauge technology is very mature, piezoresistive semiconductor sensors offer alternatives that are worth exploring to assess the unique benefits, such as better strain resolution and accuracy, which would enable balances to be designed with higher factors to safety and hence longer fatigue lifetimes without sacrificing force resolution and accuracy. A new three-component balance, based on temperature compensated semiconductor strain gauges, has been designed, calibrated and tested in a hypersonic low density wind tunnel. The static accuracy of the semiconductor balance is calibrated better than 0.3%, and the dynamic accuracy of the balance is established using a HB-2 standard model in Mach 12 hypersonic flow. Good experimental repeatability was confirmed to be better than 2.5%, and the effectiveness of the balance is demonstrated by comparing the forces and moments of measured data with computational fluid dynamics simulations, as well as reference wind tunnel results under similar condition.

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Section: Methodsmentioning

confidence: 99%

Hypersonic Aerodynamic Force Balance Using Temperature Compensated Semiconductor Strain Gauges

Qiu

Yang

Sun

et al. 2023

Preprint

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“…A third useful characteristic of scaled testing is that models can be designed ad hoc to achieve specific goals (Schottler et al, 2016;Lanfazame et al, 2016;Winslow et al, 2018;Kelley et al, 2016;Bastankhah and Porté-Agel, 2017a, b;Campagnolo et al, 2016a;Bottasso and Campagnolo, 2020;Nanos et al, 2022), and can be extensively instrumented (Bottasso and Campagnolo, 2020). Advances in 3D printing (Zhu, 2019), improvements in precision manufacturing and in the realization of complex composite structures (Campagnolo et al, 2014;Bottasso et al, 2014;Parandoush and Lin, 2017), advanced sensors (Qiu et al, 2020), miniaturized actuators, wireless transmission, and other technological improvements are being actively exploited to improve model building (Bottasso and Campagnolo, 2020). While the small dimensions often pose constraints, the flexibility offered by the design of scaled turbine models is hard to match when compared to full-scale machines.…”

Section: Validation In Wind Tunnel Experimentsmentioning

confidence: 99%

Wind farm flow control: prospects and challenges

Bottasso²,

et al. 2022

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Abstract. Wind farm control has been a topic of research for more than two decades. It has been identified as a core component of grand challenges in wind energy science to support accelerated wind energy deployment and to transition to a clean and sustainable energy system for the 21st century. The prospect of collective control of wind turbines in an array, to increase energy extraction, reduce structural loads, improve the balance of systems, reduce operation and maintenance costs, etc. has inspired many researchers over the years to propose innovative ideas and solutions. However, practical demonstration and commercialization of some of the more advanced concepts has been limited by a wide range of challenges, which include the complex physics of turbulent flows in wind farms and the atmosphere, uncertainties related to predicting structural load and failure statistics, and the highly multi-disciplinary nature of the overall design optimization problem, among others. In the current work, we aim at providing a comprehensive overview of the state of the art and outstanding challenges, thus identifying the key research areas that could further enable commercial uptake and success of wind farm control solutions. To this end, we have structured the discussion on challenges and opportunities into four main areas: (1) insight in control flow physics, (2) algorithms and AI, (3) validation and industry implementation, and (4) integrating control with system design (co-design).

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“…All this has increased the demand for these sensors. Among the most prominent features of optical sensors, for example, are the following points [3], [5], [17], [20], [21], [26]- [30], [32], [43], [48]- [50].…”

Section: Advantages Of Foss Compared To Traditional Electronic Sensorsmentioning

confidence: 99%

Optical fiber sensors: review of technology and applications

Eid

2022

IJEECS

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<p>There is a huge increase in the usage of optical fiber sensors in various fields, especially the field of communications, as these sensors have been employed in a promising industry, namely, the internet of things. This industry is witnessing a growing demand for more sensors as well as employing them in new applications, and there is an urgent need to invent new sensors to meet our requirements in providing more time, luxury, and effort with the highest quality and the best possible performance. But there is now a lot of information about optical sensors as well as many classifications and applications. There are also some developments in a scientific research yard. The main objective of this paper is to introduce short, effective, and concentrated points in optical fiber sensors such as a brief historical background, their structure, and their different operation principles, different classifications for these sensors according to different categories, and finally advantages of fiber optical sensors compared to traditional electronic sensors. I hope this content will be very useful to anyone interested in these types of sensors. This review is done with particular assurance on the recently published information.</p>

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Fiber optic sensing technologies potentially applicable for hypersonic wind tunnel harsh environments

Cited by 14 publications

References 75 publications

Hypersonic Aerodynamic Force Balance Using Temperature Compensated Semiconductor Strain Gauges

Hypersonic Aerodynamic Force Balance Using Temperature Compensated Semiconductor Strain Gauges

Wind farm flow control: prospects and challenges

Optical fiber sensors: review of technology and applications

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