Influence of the outflow initial parameters on the transverse dimensions of underxpanded argon jets in presence of condensation. (January 2023)

• Record Type: Journal Article
• Authors: Dubrovin, K.A.; Zarvin, A.E.; Kalyada, V.V.; Yaskin, A.S.
• Is Part Of: Vacuum. Volume 207(2023)
• Publication Date: 2023-01
• Subjects: Gas dynamics -- Supersonic nozzles -- Condensation process -- Cluster -- Argon jet -- Tradition flow -- Cluster wake -- Visualization; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2022.111651
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: The influence of the outflow initial parameters (stagnation pressure P 0 and temperature T 0, as well as the residual pressure in the background medium P ∞ ) on the radii in the maximum cross sections of the «traditional» initial jet and the concurrent cluster flow («cluster wake») recently discovered by the authors is considered. The empirical dependencies proposed in the well-known studies of the gas dynamics of supersonic jets are verified, amendment models that take into account the features of the outflow of gases from a supersonic nozzle under condensation conditions are presented, assumptions about the reasons for the similarity of a «traditional» jet and an external «cluster wake» are made, limitations on the conditions for «cluster wake» formation are discussed. Highlights: A method for photometric measurements in cold gas flows that do not have their own luminescence is described. The influence of the condensation process on the size of supersonic jets flowing into a highly rarefied medium is considered. Corrections for the Ashkenas-Sherman dependence are presented, taking into account the clustering of flow particles.