Flight test of a rugged scramjet-inlet temperature and velocity sensor

Kurtz, Joe; Aizengendler, Mark; Krishna, Yedhu; Walsh, Paul; O’Byrne, Sean

doi:10.2514/6.2015-0110

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…A prototype was successfully tested on the ground for signal fluctuations and signal-to-noise ratio under the pressure, temperature, and vibration conditions expected during a hypersonic flight test. The design is significantly simpler than previous designs presented in the literature and was the first TDLAS sensor design used in a scramjet inlet during a flight test [6,7].…”

Section: Discussionmentioning

confidence: 99%

“…This largely mitigated the effects of thermal drift but maintained the sensitivity of the dual-beam approach. The ac coupling (and any baseline drift due to stray light) must be accounted for in the analysis of the data [6,22].…”

Section: A Thermal Driftmentioning

confidence: 99%

“…This paper concerns the design, development, and ground testing of a diode-laser-based oxygen sensor for this inlet flow. Companion papers describe the flight test results [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Rugged, Scramjet Inlet Temperature and Velocity Sensor: Design and Ground Test

et al. 2016

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The design and testing of a gas temperature and velocity scramjet engine inlet sensor based on tunable diode laser absorption spectroscopy of oxygen is discussed. The robustness and stability of the optical design necessitated by the dynamic vibrational and thermal environment were balanced against the need for compact size and very high signalto-noise ratio in a low-pressure, high-altitude flight regime. Test results demonstrated very good mechanical and thermal stability and an adequate signal-to-noise ratio for altitudes up to 30 km with predicted O 2 absorbance peaks greater than the signal standard deviation by a factor of more than 3. Nomenclature I, I 0 = signal intensity with and without sample gas (arbitrary units) T= I∕I 0 , sample gas transmittance

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Section: Discussionmentioning

confidence: 99%

Section: A Thermal Driftmentioning

confidence: 99%

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Rugged, Scramjet Inlet Temperature and Velocity Sensor: Design and Ground Test

et al. 2016

Self Cite

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“…Therefore, future researches on this method may focus on reducing the correlation between measuring accuracy and flight noises through the optimization of relevant algorithms (hypersonic flight noises may be unavoidable, and Huang et al [136] once conducted a study to simulate hypersonic flight noises). Kurtz et al [137] also used tunable diode laser absorption spectroscopy as the sensor of air inlet temperature and flow field velocity (see Figure 38), pointing out that increasing the length of air inlets helps improve accuracy of the sensor. Jin [138] studied thermal parametric conversion induced by air distortion in hypersonic tests with tunable laser diode.…”

Section: Thermal Control Systemsmentioning

confidence: 99%

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

et al. 2019

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Combined-cycle engine is a potential propulsion system for hypersonic aircraft. To ensure long-term, normal operation of combined-cycle engine under the harsh environment of high thermal load, it is of great significance to study the thermal protection and management of the propulsion system. In this study, the objective and development status of thermal protection and thermal management systems for the combined-cycle propulsion system were described. The latest research progresses of thermal protection, thermal barrier coating, and thermal management system of the combined-cycle propulsion system were summarized. Moreover, the problems and shortcoming in current researches were summarized. In addition, a prospect for the future development of thermal protection and management of the combined-cycle propulsion system was presented, pointing out a direction of great value and vital research significance to thermal protection and management of the combined-cycle propulsion system.

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“…Sensors based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) have the advantages of high sensitivity, high stability, high selectivity and fast response, and have been widely applied in atmospheric environmental monitoring [1,2,3], medical health [4], industrial production [5,6], military surveying [7,8] and other fields. Given that the absorption spectrum is primarily determined by the atomic and molecular composition of the measured sample, it is a useful tool to determine the presence of a particular substance in a sample [9,10,11,12]. Nevertheless, the performance of TDLAS systems can be limited by many factors [13,14], especially, the measurement signal incorporates numerous contributions from optical components (interference fringe) and electronic components [15,16].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Methods and Algorithms for Improving Near-Infrared Tunable Diode-Laser Absorption Spectroscopy

Zhang

Kang

Meng

et al. 2018

Sensors

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Tunable diode laser absorption spectroscopy technology (TDLAS) has been widely applied in gaseous component analysis based on gas molecular absorption spectroscopy. When dealing with molecular absorption signals, the desired signal is usually interfered by various noises from electronic components and optical paths. This paper introduces TDLAS-specific signal processing issues and summarizes effective algorithms so solve these.

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Flight test of a rugged scramjet-inlet temperature and velocity sensor

Cited by 7 publications

References 10 publications

Rugged, Scramjet Inlet Temperature and Velocity Sensor: Design and Ground Test

Rugged, Scramjet Inlet Temperature and Velocity Sensor: Design and Ground Test

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

Mathematical Methods and Algorithms for Improving Near-Infrared Tunable Diode-Laser Absorption Spectroscopy

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