Overview of the Aero- and Aerothermodynamic Research in HOPE-X and Related Activities in Japan

Shirouzu, Masao; Inouye, Y.; Watanabe, Shigeya; Shigemi, Masashi; Ueno, Michio; Yamamoto, Yukimitsu; Ito, Takeshi

doi:10.2514/6.2004-2426

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…However, no meaningful data was obtained due to a serious mismatch in the temperature distribution from the surrounding material. To measure aerodynamic heating on the nose and elevon of HYFLEX, an aerodynamic heating sensor [6,7] was developed using C/C material, the same as TPS, with inserted sheathed type-R thermocouples (TCs). The heating rate was determined by solving the IHCP using an iterative technique.…”

Section: Long-duration Heat Load Measurement Approach By Novel Appara...mentioning

confidence: 99%

Long-duration heat load measurement approach by novel apparatus design and highly efficient algorithm

Zhu¹,

Yi²,

Meng³

et al. 2017

Meas. Sci. Technol.

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Improving the surface heat load measurement technique for vehicles in aerodynamic heating environments is imperative, regarding aspects of both the apparatus design and identification efficiency. A simple novel apparatus is designed for heat load identification, taking into account the lessons learned from several aerodynamic heating measurement devices. An inverse finite difference scheme (invFDM) for the apparatus is studied to identify its surface heat flux from the interior temperature measurements with high efficiency. A weighted piecewise regression filter is also proposed for temperature measurement prefiltering. Preliminary verification of the invFDM scheme and the filter is accomplished via numerical simulation experiments. Three specific pieces of apparatus have been concretely designed and fabricated using different sensing materials. The aerodynamic heating process is simulated by an inductively coupled plasma wind tunnel facility. The identification of surface temperature and heat flux from the temperature measurements is performed by invFDM. The results validate the high efficiency, reliability and feasibility of heat load measurements with different heat flux levels utilizing the designed apparatus and proposed method.

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Section: Long-duration Heat Load Measurement Approach By Novel Appara...mentioning

confidence: 99%

Long-duration heat load measurement approach by novel apparatus design and highly efficient algorithm

Zhu¹,

Yi²,

Meng³

et al. 2017

Meas. Sci. Technol.

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Basic Study on Feasibility of Reusable Sub-Orbital Spacecraft with Wings

Shintate

Yanagihara

Tsukamoto

2022

Lecture Notes in Electrical Engineering

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Reflectometry diagnostics for atmospheric entry applications: state-of-the-art and new developments

et al. 2023

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Insight into the plasma properties of high-speed ionized flows is key for the validation of predictive aerothermodynamic tools for atmospheric entry applications, namely plasma radiation which will be highly dependent on the flow electron densities, which accordingly need to be accurately estimated. We performed an extensive review on past re-entry microwave diagnostics, including both in-flight and ground-test experiments. This work assesses the peculiar characteristics of entry plasmas, and derives functional requirements for microwave diagnostics tailored for such applications. A preliminary analysis, including a simulation of electromagnetic environment for the RAM-C II flight experiment, obtained through a CFD code coupled to an electromagnetic propagation code, is presented. The obtained results outline the adequacy of such diagnostics for improving verification and validation for high-speed entry plasma flows.

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Overview of the Aero- and Aerothermodynamic Research in HOPE-X and Related Activities in Japan

Cited by 5 publications

References 17 publications

Long-duration heat load measurement approach by novel apparatus design and highly efficient algorithm

Long-duration heat load measurement approach by novel apparatus design and highly efficient algorithm

Basic Study on Feasibility of Reusable Sub-Orbital Spacecraft with Wings

Reflectometry diagnostics for atmospheric entry applications: state-of-the-art and new developments

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