THERMAL SCIENCE

International Scientific Journal

Chafik Bensalem

,

Abdallah Benarous

,

Pierre-Olivier Logerais

NUMERICAL ANALYSIS OF THE FLOW DYNAMICS OF AN N2 CRYOGENIC JET

ABSTRACT
Injection and mixing of cryogenic propellants are very complex at near-critical and supercritical conditions. The concise description and the reliable measurements on such flows are still questionable. In this work, a RANS study is performed for a pure N2 fluid injection at transcritical conditions on a laboratory scale test rig. An in-depth thermodynamical analysis on the real-gas behavior has allowed N2 density prediction over the experimental range of the injection temperature and for several equations of state. A focus was thrown on the prediction of the density evolution on the chamber centerline and across the injector. The calculations were performed using both adiabatic and constant temperature conditions for the injector wall. The inner heat transfer in the injector had a significant effect on the jet density distribution and therefore, on the overall flow dynamics. Numerical results regarding axial profiles of density and dense core lengths agree fairly well with the experimental data provided by the literature.
PAPER SUBMITTED: 2019-08-05
PAPER REVISED: 2020-02-27
PAPER ACCEPTED: 2020-03-27
PUBLISHED ONLINE: 2020-05-02
DOI REFERENCE: https://doi.org/10.2298/TSCI190805162B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 2, PAGES [1573 - 1586]
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Numerical analysis of the flow dynamics of an N2 cryogenic jet

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