Rarefied flow regime of an underexpanded supersonic jet

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Rarefied flow regime of an underexpanded supersonic jet. / Bykov, N. Yu.; Горбачев, Юрий Евгеньевич ; Фёдоров, Станислав Алексеевич.

In: E3S Web of Conferences, Vol. 459, 01001, 04.12.2023.

Research output: Contribution to journal › Conference article › peer-review

BibTeX

@article{ff993b368dd445d98aa6f941480d8fdb,

title = "Rarefied flow regime of an underexpanded supersonic jet",

abstract = "The results of a numerical study of a supersonic underexpanded jet flowing from a conical nozzle into a rarefied environment are presented. The modeling was performed by the direct simulation Monte Carlo method. The range of parameters corresponding to the expansion ratio 40 < n < 240, the hydrodynamic regime of the flow in the nozzle and the rarefied regime of interaction of the jet with the environment, characterized by Knudsen numbers in the range 0.03 < KnL < 0.2, is considered. It is shown that in the specified range of KnL a drastic rearrangement of the flow structure occurs. For the lower limit of the KnL range, a shock-wave structure typical of a highly underexpanded jet is observed. For Kn = 0.2, it completely degrades. Data have been obtained on the process of dimer formation in an expanding jet. An increase in the mole fraction of dimers with increasing distance from the nozzle throat is shown both in the conical nozzle and in the initial section of the jet expansion region.",

author = "Bykov, {N. Yu.} and Горбачев, {Юрий Евгеньевич} and Фёдоров, {Станислав Алексеевич}",

note = "This work was supported by the Russian Science Foundation grant no. 22-11-00080. Computing resources are provided by the supercomputer center {"}Polytechnic{"} of Peter the Great St.Petersburg Polytechnic University.; XXXIX Сибирский теплофизический семинар ; Conference date: 28-08-2023 Through 31-08-2023",

year = "2023",

month = dec,

day = "4",

doi = "10.1051/e3sconf/202345901001",

language = "English",

volume = "459",

journal = "E3S Web of Conferences",

issn = "2555-0403",

publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - Rarefied flow regime of an underexpanded supersonic jet

AU - Bykov, N. Yu.

AU - Горбачев, Юрий Евгеньевич

AU - Фёдоров, Станислав Алексеевич

N1 - Conference code: XXXIX

PY - 2023/12/4

Y1 - 2023/12/4

N2 - The results of a numerical study of a supersonic underexpanded jet flowing from a conical nozzle into a rarefied environment are presented. The modeling was performed by the direct simulation Monte Carlo method. The range of parameters corresponding to the expansion ratio 40 < n < 240, the hydrodynamic regime of the flow in the nozzle and the rarefied regime of interaction of the jet with the environment, characterized by Knudsen numbers in the range 0.03 < KnL < 0.2, is considered. It is shown that in the specified range of KnL a drastic rearrangement of the flow structure occurs. For the lower limit of the KnL range, a shock-wave structure typical of a highly underexpanded jet is observed. For Kn = 0.2, it completely degrades. Data have been obtained on the process of dimer formation in an expanding jet. An increase in the mole fraction of dimers with increasing distance from the nozzle throat is shown both in the conical nozzle and in the initial section of the jet expansion region.

AB - The results of a numerical study of a supersonic underexpanded jet flowing from a conical nozzle into a rarefied environment are presented. The modeling was performed by the direct simulation Monte Carlo method. The range of parameters corresponding to the expansion ratio 40 < n < 240, the hydrodynamic regime of the flow in the nozzle and the rarefied regime of interaction of the jet with the environment, characterized by Knudsen numbers in the range 0.03 < KnL < 0.2, is considered. It is shown that in the specified range of KnL a drastic rearrangement of the flow structure occurs. For the lower limit of the KnL range, a shock-wave structure typical of a highly underexpanded jet is observed. For Kn = 0.2, it completely degrades. Data have been obtained on the process of dimer formation in an expanding jet. An increase in the mole fraction of dimers with increasing distance from the nozzle throat is shown both in the conical nozzle and in the initial section of the jet expansion region.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85182758567&origin=inward&txGid=3ed7e1863fbb2679ea5dfa308ce888a9

UR - https://www.mendeley.com/catalogue/a4232a6a-fc39-3d80-9c81-6223fcf76fbf/

U2 - 10.1051/e3sconf/202345901001

DO - 10.1051/e3sconf/202345901001

M3 - Conference article

VL - 459

JO - E3S Web of Conferences

JF - E3S Web of Conferences

SN - 2555-0403

M1 - 01001

T2 - XXXIX Сибирский теплофизический семинар

Y2 - 28 August 2023 through 31 August 2023

ER -

ID: 59578178