TY - JOUR

T1 - Effect of Condensation on the Length of Strongly Underexpanded Jets Exhausting Into a Rarefied Submerged Space

AU - Zarvin, A. E.

AU - Yaskin, A. S.

AU - Kalyada, V. V.

N1 - Funding Information: This work was supported by the Ministry of Education and Science of the Russian Federation within the framework of the program of increasing the competitiveness of research centers (No. 5-100). The equipment of the Collective Use Center “Applied Physics” of the Physical Department of the Novosibirsk State University was used. Publisher Copyright: © 2018, Pleiades Publishing, Ltd.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Exhaustion of supersonic argon and nitrogen jets through sonic and supersonic nozzles into a rarefied submerged space at high stagnation pressures is studied experimentally. The shapes and lengths of the jets are visualized by means of detecting radiation excited in the considered flow by an electron beam. Dependences of the geometric parameters of the jets on exhaustion and clusterization conditions at low Reynolds numbers based on the reference length of the jet are obtained. It is found that the coefficient of proportionality between the length of the first “barrel” of the supersonic jet and the degree of jet expansion increases with an increase in the stagnation pressure. Empirical dependences of the proportionality coefficient on the size of clusters formed in supersonic flows are derived for the first time.

AB - Exhaustion of supersonic argon and nitrogen jets through sonic and supersonic nozzles into a rarefied submerged space at high stagnation pressures is studied experimentally. The shapes and lengths of the jets are visualized by means of detecting radiation excited in the considered flow by an electron beam. Dependences of the geometric parameters of the jets on exhaustion and clusterization conditions at low Reynolds numbers based on the reference length of the jet are obtained. It is found that the coefficient of proportionality between the length of the first “barrel” of the supersonic jet and the degree of jet expansion increases with an increase in the stagnation pressure. Empirical dependences of the proportionality coefficient on the size of clusters formed in supersonic flows are derived for the first time.

KW - clusterization

KW - electron beam visualization

KW - supersonic jet

UR - http://www.scopus.com/inward/record.url?scp=85043994459&partnerID=8YFLogxK

U2 - 10.1134/S002189441801011X

DO - 10.1134/S002189441801011X

M3 - Article

AN - SCOPUS:85043994459

VL - 59

SP - 86

EP - 92

JO - Journal of Applied Mechanics and Technical Physics

JF - Journal of Applied Mechanics and Technical Physics

SN - 0021-8944

IS - 1

ER -