No 4 (2020) Technical mechanics
Technical mechanics, 2020, 4, 65 - 71
Calculation of a 3D turbulent flow in aircraft gas turbine engine ducts
Kvasha Yu. A.
Kvasha Yu. A.
This work is devoted to the development of approaches to the numerical simulation of 3D turbulent gas
flows in different ducts of aircraft gas turbine engines, in particular in inlet device ducts. Inlet
devices must provide large values of the total pressure recovery factor and flow uniformity at the
engine compressor inlet. The aim of this work is the verification of the operability of a technique
developed earlier for the calculation of the parameters of a 3D turbulent flow in complex-shape ducts.
The basic approach is a numerical simulation of 3D turbulent gas flows on the basis of the complete
averaged Navier¬–Stokes equations and a two-parameter turbulence model. The proposed technique of
numerical simulation of a 3D gas flow was tested by calculating a 3D laminar flow in a square pipe
bent at a right angle. The calculated flow pattern is in satisfactory agreement with the experimental
data on the flow structure in a pipe elbow reported in the literature. Based on a numerical simulation
of a 3D turbulent flow in the air duct of one of the air intake configurations for an aircraft
turboprop engine, the efficiency of that configuration is assessed. The calculated flow parameter
nonuniformity at the air intake outlet, i. e., at the compressor inlet, is compared with that
obtained earlier for another air intake configuration for the same engine. It is pointed out that
the air intake configuration considered earlier provides a much more uniform flow parameter
distribution at the engine compressor inlet. On the whole, this work shows that the quality
of subsonic air intakes for aircraft gas turbine engines can be assessed using the proposed
numerical technique of 3D gas flow simulation. The results obtained may be used in the aerodynamic
improvement of inlet devices for aircraft engines of different types.
numerical simulation, 3D duct flow, pipe elbow flow, air intake, flow parameter nonuniformity
1. Kirk A. M., Gargoloff J. I., Rediniotis O. K., Cizmas P. G. A. Numerical and experimental investigation of a serpentine inlet duct. International Journal of Computational Fluid Dynamics. 2009. Vl. 23. Pp. 245-258.
Copyright (©) 2020 Kvasha Yu. A.
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