The In-Flight Sensor Systems PYREX, PHLUX and RESPECT for the Capsule EXPERT

Herdrich, Georg; Auweter‐Kurtz, Monika; Fertig, Markus; Lein, Stefan; Preci, Arianit; Schuessler, Markus; Winter, Michael

doi:10.2514/6.2006-3418

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…Such catalytic probes have previously been used for atmospheric research on sounding rockets, albeit with a different design (Perov and Rakhmanov, 1977). We adopted a concept originally developed for ESA's re-entry capsule EXPERT (European eXPErimental Reentry Testbed) (Herdrich et al, 2005). The basic idea was to simultaneously operate two measurement systems based on different principles and yet very similar in overall size and position on the rocket.…”

Section: Eberhart Et Al: Measurement Of Atomic Oxygen In the Middmentioning

confidence: 99%

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

et al. 2015

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Abstract. The middle-and upper-atmospheric energy budget is largely dominated by reactions involving atomic oxygen (O). Modeling of these processes requires detailed knowledge about the distribution of this oxygen species. Understanding the mutual contributions of atomic oxygen and wave motions to the atmospheric heating is the main goal of the rocket project WADIS (WAve propagation and DISsipation in the middle atmosphere). It includes, amongst others, our instruments for the measurement of atomic oxygen that have both been developed with the aim of resolving density variations on small vertical scales along the trajectory. In this paper the instrument based on catalytic effects (PHLUX: Pyrometric Heat Flux Experiment) is introduced briefly. The experiment employing solid electrolyte sensors (FIPEX: Flux φ(Phi) Probe Experiment) is presented in detail. These sensors were laboratory calibrated using a microwave plasma as a source of atomic oxygen in combination with mass spectrometer reference measurements. The spectrometer was in turn calibrated for O with a method based on methane. In order to get insight into the horizontal variability, the rocket payload had instrument decks at both ends. Each housed several sensor heads measuring during both the up-and downleg of the trajectory. The WADIS project comprises two rocket flights during different geophysical conditions. Results from WADIS-1 are presented, which was successfully launched in June 2013 from the Andøya Space Center, Norway. FIPEX data were sampled at 100 Hz and yield atomic oxygen density profiles with a vertical resolution better than 9 m. This allows density variations to be studied on very small spatial scales. Numerical simulations of the flow field around the rocket were done at several points of the trajectory to assess the influence of aerodynamic effects on the measurement results. Density profiles peak at 3 × 10 10 cm −3 at altitudes of 93.6 and 96 km for the up-and downleg, respectively.

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Section: Eberhart Et Al: Measurement Of Atomic Oxygen In the Middmentioning

confidence: 99%

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

et al. 2015

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“…As shown in Figure 5, one will measure emission close to the stagnation region and another one will detect emission in the downstream expansion region. The measured data will be compared to predicted emission obtained from CFD [15].…”

Section: Shock Layermentioning

confidence: 99%

In-Flight Testing of Critical Technologies and Experimentation of Aerothermodynamic Phenomena

Thoemel¹,

Muylaert²,

Ratti³

et al. 2009

16th AIAA/DLR/DGLR International Space Planes and Hypersonic Systems and Technologies Conference

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The objective of the EXPERT re-entry flight project is to obtain data on critical aerothermodynamic phenomena by means of dedicated payloads integrated onto its thermal protection system. These data will be used to validate the tools for Aerodynamic data basing and Aerothermodynamic design of thermal protection systems of hypersonic cruise and reentry spacecrafts. Validation of design tools really means understanding of the uncertainties associated with the use of ground based hypersonic facilities, with the level of validation of the physical models embedded into the numerical codes employed for the numerical reconstruction of these windtunnel experiments , its flight extrapolation as well as with the qualification of the sensors integrated into the thermal protection system . Within this paper, the objectives of the different measurement assemblies and their designs are reviewed. The theoretical tools and experimental facilities related to the flight experiments are presented.

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“…The integration of the spectra along the line of sight is performed based on the radiation transport equation and accounts for absorption. The resulting spectral radiance at the sensor head was folded with the spectrometer characteristics obtained from calibration of the sensor system in order to simulate spectrometer signals, which were used for layout of the measurement chain of RESPECT 7,11) .…”

Section: Parade -Simulation Of Radiationmentioning

confidence: 99%

“…The catalysis based sensor system PHLUX 7) aims on the investigation of gas surface interaction effects. The design of the system is based on PYREX because the measured variable is identical.…”

Section: Pyrometric Heat Flux Experiments -Phluxmentioning

confidence: 99%

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Final Design and Performance Parameters of the Payloads PYREX, PHLUX and RESPECT on EXPERT

Lein

Steinbeck

Preci

et al. 2010

AEROSPACE TECHNOLOGY JAPAN

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An overview of the IRS payload development for ESA's EXPERT mission is given. The final design and performance parameters of the payloads PYREX, PHLUX and RESPECT are described. PYREX is a sensor system measuring the thermal protection system (TPS) rear side temperature. PHLUX is a catalysis based experiment to determine the dissociation degree of the boundary layer. RESPECT applies optical emission spectroscopy to measure spectrally resolved the radiation onto a TPS surface.

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The In-Flight Sensor Systems PYREX, PHLUX and RESPECT for the Capsule EXPERT

Cited by 7 publications

References 3 publications

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

In-Flight Testing of Critical Technologies and Experimentation of Aerothermodynamic Phenomena

Final Design and Performance Parameters of the Payloads PYREX, PHLUX and RESPECT on EXPERT

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