TY - JOUR

T1 - Study of energy parameters in non-equilibrium supersonic jets at low gas pressure using the data from molecular-beam diagnostics

AU - Zarvin, A. E.

AU - Dering, E. D.

AU - Dubrovin, K. A.

AU - Kalyada, V. V.

N1 - Zarvin, A.E., Dering, E.D. et al. Study of energy parameters in non-equilibrium supersonic jets at low gas pressure using the data from molecular-beam diagnostics. Thermophys. Aeromech. 33, 211–233 (2026). https://doi.org/10.1134/S0869864326020022 Research was supported by the Russian Science Foundation (Grant No. 22-11-00080-П, https://rscf.ru/project/22-11-00080/).

PY - 2026/9/19

Y1 - 2026/9/19

N2 - The paper deals with an issue of extending the experimental capabilities in the study of gas dynamics for rarefied gas jets through using new diagnostic tools for evaluating the energy parameters of a flow. The study considers the known approaches to measuring temperature in a rarefied gas flow. We provide a detailed description of the presented method and equipment for measuring the transverse density (or intensity) profiles in a molecular beam and deriving the perpendicular speed ratio. Comparison of the experimental data with available data from theoretical models confirmed the reliability of gained information. The possibilities and conditions for calculating the translational (perpendicular) temperature were examined. The analysis covers the error and the reliability range of obtained results as well as the influence of skimmer interaction and background gas penetration on the recorded parameters. In addition, the possibility of expanding the investigation range using the selected method was considered.

AB - The paper deals with an issue of extending the experimental capabilities in the study of gas dynamics for rarefied gas jets through using new diagnostic tools for evaluating the energy parameters of a flow. The study considers the known approaches to measuring temperature in a rarefied gas flow. We provide a detailed description of the presented method and equipment for measuring the transverse density (or intensity) profiles in a molecular beam and deriving the perpendicular speed ratio. Comparison of the experimental data with available data from theoretical models confirmed the reliability of gained information. The possibilities and conditions for calculating the translational (perpendicular) temperature were examined. The analysis covers the error and the reliability range of obtained results as well as the influence of skimmer interaction and background gas penetration on the recorded parameters. In addition, the possibility of expanding the investigation range using the selected method was considered.

KW - cluster formation

KW - molecular beam

KW - perpendicular speed ratio

KW - rarefied gas dynamics

KW - skimmer

KW - supersonic jet

KW - translational temperature

KW - динамика разреженного газа

KW - сверхзвуковая струя

KW - молекулярный пучок

KW - перпендикулярное отношение скоростей

KW - поступательная температура

KW - образование кластеров

KW - скиммер

UR - https://www.mendeley.com/catalogue/a114dcc3-0018-3703-8885-7c7231e795e0/

UR - https://www.scopus.com/pages/publications/105051292332

U2 - 10.1134/S0869864326020022

DO - 10.1134/S0869864326020022

M3 - Article

VL - 33

SP - 211

EP - 233

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 2

ER -