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TsAGI Science Journal

ISSN Печать: 1948-2590
ISSN Онлайн: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.2017022809
pages 277-293

EXPERIMENTAL STUDIES OF THE AIR INTAKE IN A FREE-MOLECULAR GAS FLOW

Alexander Ivanovich Erofeev
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Street, Zhukovsky, Moscow Region, 140180, Russian Federation
Alexander Petrovich Nikiforov
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky St., Zhukovsky, Moscow Region, 140180 Russia
V. V. Plugin
Central Aerohydrodynamic Institute (TsAGI), 1 Zhukovsky Street, Zhukovsky, Moscow Region, 140180, Russian Federation

Краткое описание

Intake models of flows of molecular nitrogen (with velocities up to 4 km/s), oxygen (up to 3 km/s), and helium (up to 7 km/s) are experimentally studied in the VAT-103 vacuum wind tunnel based at TsAGI. The gas density in a storage tank connected to the air intake is measured. In addition to the experiments, the probability of molecules flying through the intake is computed by the Monte Carlo method with two models of molecule reflection from the surface: (1) diffuse reflection and (2) the Nocilla model. It is shown that the diffuse reflection model ensures an adequate description of the experimental results.


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