DOI: 10.1063/1.1761918. Structure of the Vibrational Relaxation Zone of Shock Waves in Oxygen

Structure of the Vibrational Relaxation Zone of Shock Waves in Oxygen

10.1063/1.1761918

Crossref journal-article

AIP Publishing

The Physics of Fluids (317)

Abstract

The vibrational relaxation zone of incident shock waves in oxygen has been observed with the laser schlieren technique. Thirty experiments were examined covering the temperature range 1000–3700°K. The experimental observations were subjected to an accurate numerical analysis based on the energy relaxation equation [dEν/dt=(Eνeq−Eν)/τ], and the temperature dependence of τ derived from individual experiments was compared with the temperature dependence derived from the entire set. The two temperature trends are found to agree, showing the adequacy of the energy equation as a description of relaxation in oxygen. The variation of the relaxation time with temperature is given by Pτ = (2.92 ± 0.20) × 10−10 exp [(126.0 ± 0.9)/T⅓] atm sec, which is in general agreement with previous data. Possible reasons for the apparent failure of the energy equation in the CO2 relaxation experiments of Johannesen et al. are discussed. A simple modification of the Blackman procedure for the analysis of relaxation data is suggested. This modification is shown to reduce the discrepancy between exact and approximate values of τ by a factor of three for O2 relaxation at temperatures greater than 1200°K.

Bibliography

Lutz, R. W., & Kiefer, J. H. (1966). Structure of the Vibrational Relaxation Zone of Shock Waves in Oxygen. The Physics of Fluids, 9(9), 1638â1642.

Authors 2

Robert W. Lutz (first)
John H. Kiefer (additional)

References 22 Referenced 42

10.1017/S0022112056000056 / J. Fluid Mech. (1956)
{'key': '2023080222280317200_r2', 'first-page': '1018', 'volume': '22', 'year': '1954', 'journal-title': 'J. Chem. Phys.'} / J. Chem. Phys. (1954)
{'key': '2023080222280317200_r3'}
10.1063/1.1724416 / Phys. Fluids (1959)
10.1017/S0022112061000032 / J. Fluid Mech. (1961)
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10.1063/1.1711366 / Phys. Fluids (1964)
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10.1063/1.1726741 / J. Chem. Phys. (1966)
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10.1063/1.1716132 / Rev. Sci. Instr. (1958)
10.1063/1.1724906 / J. Chem. Phys. (1964)
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{'key': '2023080222280317200_r16'}
10.1063/1.1734532 / J. Chem. Phys. (1963)
{'key': '2023080222280317200_r18'}
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{'key': '2023080222280317200_r19b', 'first-page': '373', 'volume': '148', 'year': '1963', 'journal-title': 'Dokl. Akad. Nauk SSSR'} / Dokl. Akad. Nauk SSSR (1963)
{'key': '2023080222280317200_r19c', 'first-page': '51', 'volume': '148', 'year': '1963', 'journal-title': 'Dokl. Phys. Chem.'} / Dokl. Phys. Chem. (1963)

Dates

Type	When
Created	20 years, 8 months ago (Dec. 28, 2004, 12:47 a.m.)
Deposited	2 years, 1 month ago (Aug. 2, 2023, 6:28 p.m.)
Indexed	4 months, 3 weeks ago (April 10, 2025, 6:30 a.m.)
Issued	59 years ago (Sept. 1, 1966)
Published	59 years ago (Sept. 1, 1966)
Published Online	20 years, 8 months ago (Dec. 9, 2004)
Published Print	59 years ago (Sept. 1, 1966)

Funders 0

None

BibTeX

@article{Lutz_1966, title={Structure of the Vibrational Relaxation Zone of Shock Waves in Oxygen}, volume={9}, ISSN={0031-9171}, url={http://dx.doi.org/10.1063/1.1761918}, DOI={10.1063/1.1761918}, number={9}, journal={The Physics of Fluids}, publisher={AIP Publishing}, author={Lutz, Robert W. and Kiefer, John H.}, year={1966}, month=sep, pages={1638–1642} }

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