Open AccessAerodynamic analysis of the small-scaled centrifugal compressor for micro-turbojet engine applications
Author(s) -
Aleksandr Sebelev,
Alexey Tikhonov,
V. A. Aleksenskiy,
A. A. Shengals,
O. I. Klyavin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1891/1/012017
Subject(s) - impeller , centrifugal compressor , diffuser (optics) , gas compressor , transonic , aerodynamics , mechanics , airfoil , total pressure , aerospace engineering , marine engineering , engineering , physics , optics , light source
This paper presents the results of an aerodynamic analysis of a small-scaled transonic centrifugal compressor for micro turbojet engine (TJE) applications. The analysis was conducted using a CFD model validated by experimental data collected for the gaged JetCat P200-RX micro-TJE. The loss coefficients of the impeller, vaned diffuser and deswirler were estimated for 4 design points corresponding to 70%, 80%, 90% and 100% rotation speeds to perform the loss balance diagram. The flow angle spanwise variation demonstrated an intensive flow separation zone at the top 25% of the vaned diffuser span due to the pressure shock appearance. It was shown that the main source of the losses in the investigated compressor is the deswirler due to non-optimal flow turning conditions. The diffuser loss coefficient was estimated as 0.18 at the compressor full load.