On the model of metrication of supersonic under-expanded gas jets under condensation conditions
K.A. Dubrovin1,2, A.E. Zarvin2, V.V. Kalyada2, A.S. Yaskin2
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: gas dynamics, supersonic flows, argon, condensation process, clusters, visualization
Abstract
Based on photometric measurements in an argon flow, the influence of large van der Waals clusters on the transverse dimensions of a supersonic under-expanded jet was revealed. In the range of average sizes of formed clusters 330 < 〈S〉 < 6200 part./clust., a model of corrections to the known gas-dynamic empirical dependences, formed in the absence of a condensed phase, was proposed to take into account the features of gas outflow from a supersonic nozzle under developed condensation. The possible reasons for the broadening of gas flows under conditions of developed condensation were established. The proposed correction model was tested in supersonic outflows of condensing gas on a number of supersonic conical nozzles.
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