Experimental and Numerical Diagnostics of Flow Properties in the HEK-X Expansion Tube-Reference-Cited by-同舟云学术

Experimental and Numerical Diagnostics of Flow Properties in the HEK-X Expansion Tube

Published:2024-02-28 Issue: Volume: Page:
ISSN:
Container-title:
language:
Short-container-title:

Author:

Shimamura Kohei¹,Shigeru Hara²,Tanno Hideyuki³

Affiliation:

1. Tokyo Metropolitan University

2. University of Tsukuba

3. Japan Aerospace Exploration Agency, Kakuda Space Center

Abstract

This study proposes a scheme for understanding the flow conditions in a super-orbital expansion tube. Visualization experiments and computational fluid dynamics (CFD) analysis were combined to analyze the flow dynamics of the JAXA HEK-X superorbital expansion tube. Experiments were performed at shock wave velocities of 6–8 km/s using a wedge and hemisphere probe setup, with oblique and bow shock waves visualized using a dual camera system. Atomic O-777 nm emission was also measured at the stagnation point of the hemispherical probe using the band-pass filter to compare the CFD with radiation analysis results. The CFD results, validated with visualization and 777 nm radiation measurement results, mean that the temperature, density, and velocity of the test flow can be identified, and the degree of oxygen atom dissociation in the test flow can be accurately predicted, including the degree of accuracy.

Publisher

Research Square Platform LLC

Reference17 articles.

1. Morgan, R. G. (1997). A review of the use of expansion tubes for creating superorbital flows, AIAA paper 97–0279. https://doi.org/10.2514/6.1997-279 2)James, C. M. Gildfind, D. E. Morgan, R. G. Lewis, S. W. and McIntyre, T. J. (2020) Experimentally Simulating Giant Planet Entry in an Expansion Tube, Journal of Spacecraft and Rockets 57:4, 656–671

2. https://doi.org/10.2514/1.A34457 3)David E. Gildfind, Daniel Smith, Alexis Lefevre, Peter A. Jacobs, and Timothy J. McIntyre, (2022) Magnetohydrodynamic aerobraking shock stand-off measurements with flight representative electrodynamic boundary conditions, AIAA Journal 2022 60:1, 41–55.

3. https://doi.org/10.2514/1.A34457

4. Tanno, H., Komuro, T., Sato, K., Itoh, K., Arai, K., and Yamada, K., (2016) “Basic characteristics of the free-piston driven expansion tube JAXA HEK-X,” AIAA paper 2016–3817. https://doi.org/10.2514/6.2016-3817 5)Itoh, K., Ueda, S., Komuro, T., Sato K., Takahashi, M., Miyajima, H., Tanno, H., and Muramoto, H., (1998)“Improvement of a free piston driver for a high-enthalpy shock tunnel,” Shock Waves, Vol. 8, pp. 215–233.

5. https://doi.org/10.1007/s001930050115 6)Fukumaru, S., Shimamura, K., Fujiwara, Y. Tanno, H., and Yamada, K. (2021) Aeroheating Measurement of HAYABUSA-CAPSULE using HEK-X Expansion Tube, AIAA paper 2021 – 0492.